To stay a Hula-Hoop aloft, it is helping to be in form — actually.
Experiments with gyrating, hoop-slinging robots have printed how those spinning rings keep up regardless of the pull of gravity. The form of the robotic’s physique is a an important issue, researchers record within the Jan. 7 Complaints of the Nationwide Academy of Sciences.
The form must have “hips” — a slope that gives upward drive to counteract gravity. And a “waist” — curvature like an hourglass — helps to keep the ring from drifting up or down and sliding off.
enter[type=”radio”].svelte-wecxzz{show:none}.payment-option-wrapper.svelte-wecxzz.svelte-wecxzz{show:flex;flex:1 0 28%;width:100%}.payment-option-wrapper.svelte-wecxzz.svelte-wecxzz:only-child{max-width:325px}.box-container.svelte-wecxzz.svelte-wecxzz{show:flex;flex-direction:column;flex:1 1 0;width:0;text-align:heart}.inner-box.svelte-wecxzz.svelte-wecxzz{border:var(–zf-payment-options-border);border-radius:var(–zf-payment-options-borderRadius);background-color:var(–zf-payment-options-bgColor);peak:100%;show:flex;flex-direction:column}.box-container.highlighted.svelte-wecxzz .inner-box.svelte-wecxzz{border-top-left-radius:0;border-top-right-radius:0}.box-container.svelte-wecxzz .box-content.svelte-wecxzz{flex-grow:1;padding:30px 20px;margin:0 10px;overflow:hidden}.box-container.svelte-wecxzz .styled-box-content.svelte-wecxzz{shade:var(–zephr-color-text-main);font-family:var(–zf-root-fontFamily)}
.box-container .styled-box-content h1,
.box-container .styled-box-content h2,
.box-container .styled-box-content h3,
.box-container .styled-box-content p,
.box-container .styled-box-content span
{shade:var(–zephr-color-text-main);font-family:var(–zf-root-fontFamily)}.payment-options-container .box-container .styled-box-content button{shade:#fff;background-color:var(–zephr-color-action-main);border-width:calc(var(–zephr-button-borderWidth) * 1px);border-color:var(–zephr-color-action-tinted);border-radius:calc(var(–zephr-button-borderRadius) * 1px);font-size:var(–zf-button-fontSize)}.payment-options-container .box-container .styled-box-content button:hover{background-color:var(–zephr-color-action-tinted);border-color:var(–zephr-color-action-tinted)}.payment-options-container .box-container .box-content img{max-width:210px;peak:auto}.box-top.svelte-wecxzz.svelte-wecxzz{peak:40px}.box-container.highlighted.svelte-wecxzz .box-top.svelte-wecxzz{shade:var(–zf-payment-options-highlighted-color);background-color:var(–zf-payment-options-highlighted-bgColor);role:relative;border:var(–zf-payment-options-border);border-bottom-width:0;border-radius:var(–zf-payment-options-borderRadius);border-bottom-left-radius:0;border-bottom-right-radius:0;show:flex;justify-content:heart;align-items:heart}.box-container.highlighted.svelte-wecxzz .box-top .box-top-text.svelte-wecxzz{font-weight:ambitious}.box-container.svelte-wecxzz .box-bottom.svelte-wecxzz{min-height:60px;show:flex;flex-direction:column;align-items:heart;padding:20px 0 30px;margin:0 30px}.button-sub-text.svelte-wecxzz.svelte-wecxzz{margin-top:10px}
.payment-options-container.svelte-15oxdku{flex-wrap:wrap;font-size:var(–zf-payment-options-fontSize);width:100%;shade:var(–zf-payment-options-color);line-height:18px;padding:31px 0 20px;show:grid;justify-content:space-evenly;justify-items:heart;grid-template-columns:repeat(auto-fit, minmax(300px, 1fr));hole:13px}@media(max-width: 340px){.payment-options-container.svelte-15oxdku{grid-template-columns:repeat(auto-fit, minmax(280px, 1fr))}}
.zephr-form-error-message-min-height.svelte-719cfr{min-height:1.1em}.zephr-form-error-message.svelte-719cfr{shade:var(–zephr-color-warning-main);font-size:var(–zf-subtext-fontSize);margin-top:0.5em;role:relative;margin-left:1.2em;margin-right:1.2em}
.zephr-form-input-inner-container.svelte-127vcsp{role:relative}.zephr-form-input-full-width.svelte-127vcsp{width:100%}.zephr-form-input.svelte-127vcsp{width:100%;show:block;peak:calc(var(–zephr-input-height) * 1px);padding-left:8px;font-size:var(–zf-input-fontSize);border:calc(var(–zephr-input-borderWidth) * 1px) cast
var(–zephr-input-borderColor);border-radius:calc(var(–zephr-input-borderRadius) * 1px);transition:border-color 0.25s ease, box-shadow 0.25s ease;define:0;shade:var(–zephr-color-text-main);background-color:var(–zf-input-bgColor);font-family:var(–zf-root-fontFamily)}.zephr-form-input.svelte-127vcsp::placeholder{shade:var(–zephr-color-background-tinted);font-family:var(–zf-root-fontFamily)}.zephr-form-input-checkbox.svelte-127vcsp{width:auto;peak:auto;margin:8px 5px 0 0;go with the flow:left}.zephr-form-input-radio.svelte-127vcsp{role:absolute;opacity:0;cursor:pointer;peak:0;width:0}.zephr-form-input-color[type=”color”].svelte-127vcsp{width:50px;padding:0;border-radius:50%}.zephr-form-input-color[type=”color”].svelte-127vcsp::-webkit-color-swatch{border:none;border-radius:50%;padding:0}.zephr-form-input-color[type=”color”].svelte-127vcsp::-webkit-color-swatch-wrapper{border:none;border-radius:50%;padding:0}.zephr-form-input.disabled.svelte-127vcsp,.zephr-form-input.disabled.svelte-127vcsp:hover{border:calc(var(–zephr-input-borderWidth) * 1px) cast
var(–zephr-input-borderColor);background-color:var(–zephr-color-background-tinted)}.zephr-form-input.error.svelte-127vcsp{border:1px cast var(–zephr-color-warning-main)}
.zephr-form-input-label.svelte-vnzoa4.svelte-vnzoa4{margin-top:10px;show:block;line-height:30px;font-size:var(–zf-subtext-fontSize);shade:var(–zephr-color-text-tinted);font-family:var(–zf-root-fontFamily)}.zephr-form-input-label.svelte-vnzoa4.svelte-vnzoa4:first-child{margin-top:0}.zephr-form-input-label.svelte-vnzoa4 span.svelte-vnzoa4{show:block}
.svelte-fa-base{peak:1em;overflow:seen;transform-origin:heart;vertical-align:-0.125em}.svelte-fa-fw{text-align:heart;width:1.25em}.svelte-fa-pull-left.svelte-bvo74f{go with the flow:left}.svelte-fa-pull-right.svelte-bvo74f{go with the flow:appropriate}.svelte-fa-size-lg.svelte-bvo74f{font-size:1.33333em;line-height:0.75em;vertical-align:-0.225em}.svelte-fa-size-sm.svelte-bvo74f{font-size:0.875em}.svelte-fa-size-xs.svelte-bvo74f{font-size:0.75em}.spin.svelte-bvo74f{animation:svelte-bvo74f-spin 2s 0s countless linear}.pulse.svelte-bvo74f{animation:svelte-bvo74f-spin 1s countless steps(8)}@keyframes svelte-bvo74f-spin{0%{rework:rotate(0deg)}100%{rework:rotate(360deg)}}
.svelte-fa-layers.svelte-1sinijc{show:inline-block;role:relative}.svelte-fa-layers.svelte-1sinijc .svelte-fa{role:absolute;backside:0;left:0;appropriate:0;peak:0;margin:auto;text-align:heart}.svelte-fa-layers.svelte-1sinijc .svelte-fa-layers-text{role:absolute;peak:50%;left:50%;rework:translate(-50%, -50%)}.svelte-fa-layers.svelte-1sinijc .svelte-fa-layers-text span{show:inline-block}.svelte-fa-pull-left.svelte-1sinijc{go with the flow:left}.svelte-fa-pull-right.svelte-1sinijc{go with the flow:appropriate}.svelte-fa-size-lg.svelte-1sinijc{font-size:1.33333em;line-height:0.75em;vertical-align:-0.225em}.svelte-fa-size-sm.svelte-1sinijc{font-size:0.875em}.svelte-fa-size-xs.svelte-1sinijc{font-size:0.75em}
.container.svelte-1x0c3df{show:inline-block;peak:auto}.svelte-fa-size-lg.svelte-1x0c3df{font-size:1.33333em;line-height:0.75em;vertical-align:-0.225em}.svelte-fa-size-sm.svelte-1x0c3df{font-size:0.875em}.svelte-fa-size-xs.svelte-1x0c3df{font-size:0.75em}
.zephr-form-password-match.svelte-11tz5c7.svelte-11tz5c7{margin:20px 0;justify-content:heart}.zephr-form-password-match.svelte-11tz5c7 ul.svelte-11tz5c7{padding-left:0;margin:0}.zephr-form-password-requirement.svelte-11tz5c7.svelte-11tz5c7{show:flex;align-items:heart;shade:var(–zephr-color-text-tinted);font-size:var(–zf-subtext-fontSize);min-height:20px;font-family:var(–zf-root-fontFamily)}.zephr-form-password-requirement-icon.svelte-11tz5c7.svelte-11tz5c7{margin-right:10px;font-size:15px}
.zephr-form-password-progress.svelte-1b6w0g8.svelte-1b6w0g8{show:flex;margin-top:10px}.zephr-form-password-bar.svelte-1b6w0g8.svelte-1b6w0g8{width:100%;peak:4px;border-radius:2px}.zephr-form-password-bar.svelte-1b6w0g8.svelte-1b6w0g8:no longer(:first-child){margin-left:8px}.zephr-form-password-requirements.svelte-1b6w0g8.svelte-1b6w0g8{margin:20px 0;justify-content:heart}.zephr-form-password-requirements.svelte-1b6w0g8 ul.svelte-1b6w0g8{padding-left:0;margin:0}.zephr-form-password-requirement.svelte-1b6w0g8.svelte-1b6w0g8{show:flex;align-items:heart;shade:var(–zephr-color-text-tinted);font-size:var(–zf-subtext-fontSize);min-height:20px;font-family:var(–zf-root-fontFamily)}.zephr-form-password-requirement-icon.svelte-1b6w0g8.svelte-1b6w0g8{margin-right:10px;font-size:15px}
.apple-pay-button{show:inline-block;-webkit-appearance:-apple-pay-button;-apple-pay-button-type:pay;width:440px;max-width:100%;peak:45px;margin-top:20px}.apple-pay-button-black{-apple-pay-button-style:black}#google-pay-button.svelte-1acsmhs{width:440px;max-width:100%;peak:45px;margin-top:20px}
#braintree-dropin-container.svelte-z7jd27{margin-top:1em;margin-bottom:1em}
#stripe-element.svelte-1lhuc6b{margin-top:2em;margin-bottom:1em;border:calc(var(–zephr-input-borderWidth) * 1px) cast
var(–zephr-input-borderColor);border-radius:calc(var(–zephr-input-borderRadius) * 1px);padding:1em}#stripe-element.svelte-1lhuc6b iframe:concentration{define:none !vital}
#stripe-mobile-pay-button.svelte-1t95nqv{width:440px;max-width:100%;peak:45px;margin-top:20px}
.spinner-container.svelte-1isq5k3{text-align:heart;padding:2em}
#zuora_payment.svelte-cf8b5h{margin-top:1em;margin-bottom:1em}.zuora-disabled-iframe-container.svelte-cf8b5h .z_hppm_iframe{pointer-events:none;opacity:0.3}
#payment-element.svelte-1oygrrs{margin-top:1em;margin-bottom:1em;border:calc(var(–zephr-input-borderWidth) * 1px) cast
var(–zephr-input-borderColor);border-radius:calc(var(–zephr-input-borderRadius) * 1px);padding:1em}
.check-image.svelte-12ljnq4{peak:1.2em;vertical-align:center;margin-right:0.5em}.zephr-form-success-message.svelte-12ljnq4{shade:var(–zephr-color-text-main);show:inline-block}
.zephr-form-verification-resend-link-container.svelte-b6r3ph{margin-bottom:2em}.zephr-form-verification-resend-link.svelte-b6r3ph,.zephr-form-verification-resend-text.svelte-b6r3ph{go with the flow:appropriate;role:absolute;padding-right:2px;padding-top:0.5em;padding-left:0.5em;font-size:var(–zf-subtext-fontSize);appropriate:0}.zephr-form-verification-resend-link.svelte-b6r3ph{cursor:pointer;shade:var(–zf-link-color)}
.zephr-form-custom-text.svelte-12fdogm{margin-top:1em;margin-bottom:1em;shade:var(–zephr-color-text-main)}
.zephr-form-checkbox.svelte-eyzg32.svelte-eyzg32.svelte-eyzg32{role:absolute;opacity:0;cursor:pointer;peak:0;width:0}.zephr-form-checkbox-label.svelte-eyzg32.svelte-eyzg32.svelte-eyzg32{show:flex;align-items:heart;font-family:var(–zf-root-fontFamily)}.zephr-form-checkmark.svelte-eyzg32.svelte-eyzg32.svelte-eyzg32{role:relative;box-sizing:border-box;peak:23px;width:23px;background-color:#fff;border:calc(var(–zephr-input-borderWidth) * 1px) cast
var(–zephr-input-borderColor);border-radius:6px;margin-right:12px;cursor:pointer}.zephr-form-checkmark.checked.svelte-eyzg32.svelte-eyzg32.svelte-eyzg32{border-color:var(–zephr-color-action-main)}.zephr-form-checkmark.checked.svelte-eyzg32.svelte-eyzg32.svelte-eyzg32:after{content material:””;role:absolute;width:6px;peak:13px;border:cast var(–zephr-color-action-main);border-width:0 2px 2px 0;rework:rotate(45deg);peak:3px;left:8px;box-sizing:border-box}.zephr-form-checkmark.disabled.svelte-eyzg32.svelte-eyzg32.svelte-eyzg32{border:calc(var(–zephr-input-borderWidth) * 1px) cast
var(–zephr-color-background-tinted)}.zephr-form-checkmark.disabled.checked.svelte-eyzg32.svelte-eyzg32.svelte-eyzg32:after{border:cast var(–zephr-color-background-tinted);border-width:0 2px 2px 0}.zephr-form-checkmark.error.svelte-eyzg32.svelte-eyzg32.svelte-eyzg32{border:calc(var(–zephr-input-borderWidth) * 1px) cast
var(–zephr-color-warning-main)}.zephr-form-checkbox.svelte-eyzg32:focus-visible+.zephr-form-checkbox-label.svelte-eyzg32>.zephr-form-checkmark.svelte-eyzg32{define:2px cast var(–zephr-color-action-main);outline-color:-webkit-focus-ring-color}
.zephr-form-input-radio.svelte-17rnpjv.svelte-17rnpjv.svelte-17rnpjv{role:absolute;opacity:0;cursor:pointer;peak:0;width:0}.zephr-form-radio-label.svelte-17rnpjv.svelte-17rnpjv.svelte-17rnpjv{show:flex;align-items:heart;font-family:var(–zf-root-fontFamily)}.zephr-form-radio-dot.svelte-17rnpjv.svelte-17rnpjv.svelte-17rnpjv{show:block;role:relative;box-sizing:border-box;peak:23px;width:23px;background-color:#fff;border:1px cast #ebebeb;border-radius:50%;margin-right:12px;cursor:pointer}.checked.svelte-17rnpjv.svelte-17rnpjv.svelte-17rnpjv{border-color:var(–zephr-color-action-main)}.checked.svelte-17rnpjv.svelte-17rnpjv.svelte-17rnpjv:after{content material:””;role:absolute;width:17px;peak:17px;background:var(–zephr-color-action-main);border-radius:50%;peak:2px;left:2px}.disabled.checked.svelte-17rnpjv.svelte-17rnpjv.svelte-17rnpjv:after{background:var(–zephr-color-background-tinted)}.error.svelte-17rnpjv.svelte-17rnpjv.svelte-17rnpjv{border:1px cast var(–zephr-color-warning-main)}.zephr-form-input-radio.svelte-17rnpjv:focus-visible+.zephr-form-radio-label.svelte-17rnpjv>.zephr-form-radio-dot.svelte-17rnpjv{define:2px cast var(–zephr-color-action-main);outline-color:-webkit-focus-ring-color}
.zephr-form-input-error-text.svelte-1f2hwm0{shade:var(–zephr-color-warning-main);font-family:var(–zf-root-fontFamily)}.zephr-form-input-select.svelte-1f2hwm0{show:block;look:auto;width:100%;peak:calc(var(–zephr-input-height) * 1px);font-size:var(–zf-input-fontSize);font-family:var(–zf-root-fontFamily);border:calc(var(–zephr-input-borderWidth) * 1px) cast
var(–zephr-input-borderColor);border-radius:calc(var(–zephr-input-borderRadius) * 1px);transition:border-color 0.25s ease, box-shadow 0.25s ease;define:0;shade:var(–zephr-color-text-main);background-color:var(–zf-input-bgColor);padding:10px}.zephr-form-input-select.unselected.svelte-1f2hwm0{shade:var(–zephr-color-background-tinted)}.zephr-form-input-select.error.svelte-1f2hwm0{border-color:var(–zephr-color-warning-main)}.zephr-form-input-textarea.svelte-1f2hwm0{show:block;min-height:calc(var(–zephr-input-height) * 1px);min-width:100%;max-width:100%;background-color:var(–zf-input-bgColor);border:calc(var(–zephr-input-borderWidth) * 1px) cast var(–zephr-input-borderColor);border-radius:calc(var(–zephr-input-borderRadius) * 1px);transition:border-color 0.25s ease, box-shadow 0.25s ease;shade:var(–zephr-color-text-main);font-size:var(–zf-input-fontSize);font-weight:300;padding:16px 8px;font-family:var(–zf-root-fontFamily);define:0}.zephr-form-input-textarea.svelte-1f2hwm0::placeholder{shade:var(–zephr-color-background-tinted);font-family:var(–zf-root-fontFamily)}.zephr-form-input-slider-output.svelte-1f2hwm0{margin:13px 0 0 10px}
.zephr-form-link.svelte-1mdtotm{margin:10px 0;shade:var(–zf-link-color);text-decoration:underline;cursor:pointer;font-family:var(–zf-root-fontFamily)}.zephr-form-link-disabled.svelte-1mdtotm{shade:var(–zephr-color-text-main);cursor:not-allowed;text-decoration:none}.zephr-form-link-no-underline.svelte-1mdtotm{text-decoration:none}
.zephr-form-reset-link-container.svelte-11qigta{min-height:2.5em}.zephr-form-link-message.svelte-11qigta{margin:10px 0 10px 20px;font-family:var(–zf-root-fontFamily)}
.zephr-form-reset-link-container.svelte-11qigta{min-height:2.5em}.zephr-form-link-message.svelte-11qigta{margin:10px 0 10px 20px;font-family:var(–zf-root-fontFamily)}
.zephr-form-google-icon.svelte-155mfls{width:20px}
.zephr-form-social-sign-in.svelte-18a7qws{align-items:heart}.zephr-form-social-sign-in-button.svelte-18a7qws{width:100%;min-height:55px;padding:15px;shade:#000;background-color:#fff;box-shadow:0 0 5px rgba(0, 0, 0, 0.3);border-radius:10px;font-size:17px;show:flex;align-items:heart;cursor:pointer;margin-top:20px;font-family:var(–zf-root-fontFamily)}.zephr-form-social-sign-in-button.svelte-18a7qws:hover{background-color:#fafafa}.zephr-form-social-sign-in-icon.svelte-18a7qws{show:flex;justify-content:heart;margin-right:30px;width:25px}
.zephr-form-promo-input-container.svelte-19l6fte{flex:0.6}.zephr-form-promo-activate-line.svelte-19l6fte{show:flex;cursor:pointer;min-height:calc(var(–zephr-input-height) * 1px);margin:1em 1.2em;font-size:var(–zf-payment-summary-fontSize);line-height:calc(var(–zephr-input-height) * 1px);shade:var(–zf-link-color)}.zephr-form-promo-line.svelte-19l6fte{show:flex;min-height:calc(var(–zephr-input-height) * 1px);margin:1em 1.2em}.zephr-form-addon-line.svelte-19l6fte{show:flex;padding-top:1em;padding-bottom:1em;margin-left:1.2em}.zephr-form-summary-prorate-disclaimer.svelte-19l6fte{padding-top:0.25em;padding-left:1em;shade:var(–zephr-color-text-tinted)}.zephr-form-summary-charge-description.svelte-19l6fte{shade:var(–zephr-color-text-tinted)}.zephr-form-charge-line.svelte-19l6fte{show:flex;padding-top:1em;margin-left:1.2em;padding-left:1em}.zephr-form-summary-line-right.svelte-19l6fte{margin-left:auto;margin-right:1.5em;text-align:appropriate}.zephr-form-summary-line-left.svelte-19l6fte{margin-left:10px}.zephr-form-summary-promo-middle.svelte-19l6fte{role:relative;peak:calc(var(–zephr-input-height) * 0.5px)}.zephr-form-summary.svelte-19l6fte{border:var(–zf-payment-summary-border);border-radius:var(–zf-payment-summary-borderRadius);padding-top:1em;padding-bottom:1em;font-size:var(–zf-payment-summary-fontSize);margin-top:1.5em;margin-bottom:1.5em;shade:var(–zf-payment-summary-color);background-color:var(–zf-payment-summary-bgColor)}.zephr-form-summary.svelte-19l6fte:first-child{margin-top:0}.zephr-form-summary-title.svelte-19l6fte{margin-bottom:1em;margin-left:1.2em}.zephr-form-summary-price-line.svelte-19l6fte{font-weight:ambitious;padding-left:1em;padding-top:1em}.zephr-form-summary-line.svelte-19l6fte{show:flex}.zephr-form-summary-price-line-upper.svelte-19l6fte{border-top:var(–zf-payment-summary-border);margin-top:1em}.zephr-form-summary-line-title.svelte-19l6fte{flex:0 0 65%;margin-left:1.2em}.zephr-form-summary-line-price.svelte-19l6fte{flex:1;text-align:appropriate;margin-right:1.5em}
.zephr-form-divider-container.svelte-1ni5n6w{show:flex;align-items:heart;justify-content:heart;margin:1.5em 0}.zephr-form-divider-line.svelte-1ni5n6w{peak:1px;width:50%;margin:0 5px;background-color:var(–zephr-color-text-tinted)}.zephr-form-divider-line-complete.svelte-1ni5n6w{peak:1px;width:100%;margin:0 5px;background-color:var(–zephr-color-text-tinted)}.zephr-form-divider-text.svelte-1ni5n6w{margin:0 12px;shade:var(–zephr-color-text-main);font-size:14px;font-family:var(–zf-root-fontFamily);white-space:nowrap}
.zephr-form-login-link.svelte-1bpa3mq.svelte-1bpa3mq{margin-top:1em;margin-bottom:1em;text-align:heart}.zephr-form-login-link.svelte-1bpa3mq>a.svelte-1bpa3mq{shade:var(–zf-link-color);margin-left:0.25em}
.zephr-form-account-code-container.svelte-ctt9he{margin-top:1.5em}
.zephr-form-invitation-container.svelte-yy7ok3{border:1px cast;margin:1.5em 0;padding:20px;shade:var(–zephr-color-text-main)}.zephr-form-invitation-title.svelte-yy7ok3{margin-bottom:20px;font-weight:ambitious;font-family:var(–zf-root-fontFamily)}.zephr-form-invitation-email.svelte-yy7ok3{show:flex;align-items:heart}.zephr-form-invitation-input-container.svelte-yy7ok3{flex-grow:1}.zephr-form-invitation-success-message.svelte-yy7ok3{margin-top:0.5em}
.subscription-option-product-label{margin-bottom:5px;margin-top:0}.subscription-option-wrapper.svelte-1ecrab7{show:flex;flex:1 0 28%;width:100%;max-width:400px}.subscription-option-wrapper.svelte-1ecrab7:only-child{max-width:325px}.subscription-option-box{show:flex;flex-direction:column;flex:1 1 0;width:0}.info-row.svelte-1ecrab7{margin-top:7px;margin-bottom:7px}.info-label.svelte-1ecrab7{show:inline;margin-right:10px}.details.svelte-1ecrab7{show:inline}hr.svelte-1ecrab7{border-width:1px 0px 0px;margin:5px 5px;border-color:var(–zephr-color-background-tinted)}.inner-box.svelte-1ecrab7{border:var(–zf-payment-options-border);border-radius:var(–zf-payment-options-borderRadius);background-color:var(–zf-payment-options-bgColor);peak:100%;show:flex;flex-direction:column;flex-grow:1;padding:20px 20px;margin:0 10px;overflow:hidden}.change-disabled-label.svelte-1ecrab7{margin-top:15px}
.subscription-options-container.svelte-1nzbr4y{flex-wrap:wrap;font-size:var(–zf-payment-options-fontSize);width:100%;shade:var(–zf-payment-options-color);line-height:18px;padding:31px 0 20px;show:grid;justify-content:space-evenly;justify-items:heart;grid-template-columns:repeat(auto-fit, minmax(300px, 1fr));hole:13px}@media(max-width: 340px){.subscription-options-container.svelte-1nzbr4y{grid-template-columns:repeat(auto-fit, minmax(280px, 1fr))}}
.subscription-list-item.svelte-1wg9q7{font-family:var(–zephr-typography-body-font), var(–zephr-typography-body-fallbackFont);shade:var(–zephr-color-text-main)}hr.svelte-1wg9q7{border-width:1px 0px 0px;margin:20px 0px;border-color:var(–zephr-color-background-tinted)}.inactive.svelte-1wg9q7{text-decoration:line-through}h3.svelte-1wg9q7{margin:0 0 20px}.inner-box.svelte-1wg9q7{show:flex;flex-direction:column;flex-grow:1;padding:30px 20px;margin:0 10px;overflow:hidden;min-width:300px}
.subscriptions-list-container.svelte-ewgdz9{margin-top:15px}
.event-link-wrapper{margin-top:10px}.float-right.svelte-12vtv9v{go with the flow:appropriate;margin-top:calc(var(–zephr-input-height) * -1px + 5px)}
.bold-label.svelte-121zkre label{font-weight:ambitious}.read-only-input.svelte-121zkre{border:none;background:none;shade:#333;cursor:default;define:none;flex-grow:1;margin-right:10px;margin-top:15px}.zephr-form-relative-container.svelte-121zkre{show:flex;align-items:heart;justify-content:space-between;width:100%}.update-link{white-space:nowrap;text-decoration:none;font-size:0.75em}
.bold-label.svelte-121zkre label{font-weight:ambitious}.read-only-input.svelte-121zkre{border:none;background:none;shade:#333;cursor:default;define:none;flex-grow:1;margin-right:10px;margin-top:15px}.zephr-form-relative-container.svelte-121zkre{show:flex;align-items:heart;justify-content:space-between;width:100%}.update-link{white-space:nowrap;text-decoration:none;font-size:0.75em}
.zephr-form-ro-attribute{show:flex;align-items:heart;peak:50px;justify-content:flex-start}.zephr-form-ro-attribute-label{margin-right:10px;&:after {
content material: “: “;
}}
hr.svelte-4jb3ht{border-width:1px 0px 0px;margin:20px 0px;border-color:var(–zephr-color-background-tinted)}.session-container.svelte-4jb3ht{padding:15px;show:flex;flex-direction:column}.device-title.svelte-4jb3ht{font-weight:ambitious;font-size:1.2em;margin-bottom:10px}.current-device.svelte-4jb3ht{shade:#777;font-size:0.9em;margin-left:10px}.login-time.svelte-4jb3ht,.browser.svelte-4jb3ht,.nation.svelte-4jb3ht{margin-bottom:10px;font-size:0.9em}
.sign-out-all.svelte-1gdzu2p{shade:#0073e6;cursor:pointer;font-size:1em;margin:20px 0;text-align:heart}.sign-out-all.svelte-1gdzu2p:hover{text-decoration:underline}
.desk.svelte-1b6aeft.svelte-1b6aeft{show:grid;grid-template-columns:0.7fr 1.4fr 1fr 0.6fr}.table-head.svelte-1b6aeft.svelte-1b6aeft{show:contents}.table-row.svelte-1b6aeft.svelte-1b6aeft{show:contents}.table-head.svelte-1b6aeft>div.svelte-1b6aeft{font-size:13px;padding:13px 10px 10px;border-bottom:1px cast var(–zephr-color-background-tinted)}.table-row.svelte-1b6aeft>div.svelte-1b6aeft{font-size:14px;peak:60px;padding:0 10px;border-bottom:1px cast var(–zephr-color-background-tinted);show:flex;align-items:heart}.table-head.svelte-1b6aeft>div.svelte-1b6aeft:first-child,.table-row.svelte-1b6aeft>div.svelte-1b6aeft:first-child{padding-left:0}.table-head.svelte-1b6aeft>div.svelte-1b6aeft:last-child,.table-row.svelte-1b6aeft>div.svelte-1b6aeft:last-child{padding-right:0}.taxes.svelte-1b6aeft.svelte-1b6aeft{shade:var(–zephr-color-background-tinted);white-space:pre;font-size:small}
.zephr-form-content.svelte-1g2h5zh{padding:var(–zf-container-padding);background-color:var(–zf-container-bgColor);border:var(–zf-container-border);border-radius:var(–zf-container-borderRadius)}.zephr-payment-options-content.svelte-1g2h5zh{background-color:clear;border:none;border-radius:0}.zephr-form-max-width.svelte-1g2h5zh{max-width:var(–zf-container-maxWidth);margin:auto}.close-button-container.svelte-1g2h5zh{text-align:appropriate;width:100%;margin-bottom:15px}.close-button.svelte-1g2h5zh{cursor:pointer;show:inline;padding:7px;min-width:32px;min-height:32px;border-radius:16px;margin:1px}
.zephr-form{–zf-root-fontSize:16px;–zf-root-fontFamily:var(–zephr-typography-body-font), var(–zephr-typography-body-fallbackFont);–zf-container-maxWidth:440px;–zf-container-padding:20px;–zf-container-margin:20px auto;–zf-container-border:none;–zf-container-borderRadius:calc(var(–zephr-input-borderRadius) * 1px);–zf-container-color:var(–zephr-color-text-main);–zf-container-bgColor:var(–zephr-color-background-main, clear);–zf-subtext-fontSize:12px;–zf-link-color:#6ba5e9;–zf-input-fontSize:var(–zf-root-fontSize);–zf-input-bgColor:var(–zephr-color-background-main, clear);–zf-button-fontSize:calc(var(–zephr-button-fontSize, 16) * 1px);–zf-button-color:#fff;–zf-password-valid-color:#7bcb7f;–zf-password-invalid-color:#c4c4c4;–zf-payment-options-fontSize:var(–zf-subtext-fontSize);–zf-payment-options-color:var(–zephr-color-text-main);–zf-payment-options-bgColor:var(–zf-container-bgColor);–zf-payment-options-border:calc(var(–zephr-input-borderWidth) * 1px) cast var(–zephr-input-borderColor);–zf-payment-options-borderRadius:calc(var(–zephr-input-borderRadius) * 1px);–zf-payment-options-highlighted-color:var(–zephr-color-text-main);–zf-payment-options-highlighted-bgColor:var(–zephr-color-accent-main);–zf-payment-summary-fontSize:var(–zf-subtext-fontSize);–zf-payment-summary-color:var(–zephr-color-text-main);–zf-payment-summary-bgColor:var(–zf-input-bgColor);–zf-payment-summary-border:calc(var(–zephr-input-borderWidth) * 1px) cast var(–zephr-input-borderColor);–zf-payment-summary-borderRadius:calc(var(–zephr-input-borderRadius) * 1px)}.zephr-form.svelte-1ta1qs8{shade:var(–zf-container-color);margin:var(–zf-container-margin);font-size:var(–zf-root-fontSize);font-family:var(–zf-root-fontFamily)}.zephr-form *{box-sizing:border-box}:the place(.zephr-form) button{text-transform:unset;overflow:seen;font-family:var(–zf-root-fontFamily, unset);font-size:var(–zf-root-fontSize, unset);line-height:unset;margin:unset;padding:unset;border:unset;background:unset;&:hover, &:focus-visible {
border: unset;
background: unset;
}}.zephr-form-disabled-div{pointer-events:none;opacity:0.8}.zephr-form-relative-container{role:relative}.zephr-form-flex-container{show:flex}.zephr-form-input-inner-button{cursor:pointer;role:absolute;peak:50%;rework:translateY(-50%);appropriate:5px;padding:10px 5px}.zephr-form-input-inner-text{shade:var(–zephr-color-text-main);font-size:var(–zf-subtext-fontSize);font-weight:ambitious;font-family:var(–zf-root-fontFamily)}
]]>
a {
shade: white !vital;
}
.zephr-form-button {
background-color: #d4441f !vital;
text-transform: uppercase !vital;
font-weight: 900 !vital;
letter-spacing: 0.075em;
font-size: 1.2em !vital;
border: 2px cast black !vital;
}
.zephr-form {
border: 1px cast #ffcccb;
background-image: url(”
background-size: quilt;
background-position: left peak;
background-image:url(”
padding: 20px;
padding-top: 40px;
}
.zephr-form {
–zf-container-bgColor: none;
–zf-container-maxWidth: 900px;
}
.zephr-form-input {
font-size: 1.5rem !vital;
font-family: monospace !vital;
clear out: drop-shadow(black .1rem .1rem 5px);
}
.zephr-form-error-message {
background-color:white;
padding:5px;
font-weight:ambitious
}
.zephr-form-input::placeholder {
font-family: “Courier New” !vital;
shade: #999 !vital;
}]]>
Impressed via performers close to his house in Greenwich Village, implemented mathematician Leif Ristroph of New York College started taking into consideration the physics of Hula-Hoops. Earlier research, he and co-workers learned, hadn’t defined how the ring remains aloft. (Ristroph has a monitor document of tackling quirky physics questions. His staff lately investigated what would occur if a garden sprinkler sucked water in as a substitute of taking pictures it out.)
So Ristroph and co-workers gave it a whirl. In experiments, a gyrating cylindrical robotic couldn’t stay a ring from sliding down. It was once lacking the crucial upward drive, generated when a ring swings over a sloped form. However a cone-shaped robotic, with a slope however no waistlike curve, additionally failed. If the ring started towards the highest of the cone, the upward drive overpowered gravity, and the ring would migrate up. If the ring started towards the ground, the upward drive wasn’t sufficient to stay it aloft, and it migrated down. However an hourglass-shaped robotic stored a ring often aloft.
Other folks must be capable to hula-hoop without reference to physique form, via adapting their gyrations in keeping with role adjustments of the ring. Certainly, the researchers had been in a position to get a cone-shaped robotic to hula-hoop via adjusting the speed of gyration relying on how top the ring slid.
A right kind release was once additionally crucial within the experiments. If the ring began off too gradual, the try would fail. In a success classes, the ring coated up with the gyrating physique, such that the ring and physique all the time shifted in the similar route. That’s additionally the easiest way to release a ring, Ristroph says.
A last tip gleaned from the analysis: Larger hoops are just right for newbies — they are able to be supported with slower gyrations.
Questions or feedback in this article? Electronic mail us at comments@sciencenews.org | Reprints FAQ
Physics creator Emily Conover has a Ph.D. in physics from the College of Chicago. She is a two-time winner of the D.C. Science Writers’ Affiliation Newsbrief award.
We’re at a crucial time and supporting local weather journalism is extra vital than ever. Science Information and our guardian group, the Society for Science, want your assist to reinforce environmental literacy and be sure that our reaction to local weather exchange is knowledgeable via science.
Please
subscribe to Science Information and upload $16 to enlarge
science literacy and working out.
:max_bytes(150000):strip_icc()/GettyImages-2227392128-f95994034c8f47c38408febb9d015a6c.jpg "Markets Information, July 28, 2025: S&P 500, Nasdaq Shut at New Highs as Buyers Watch for Extra Business Information, Brace for Giant Tech Income, Fed Determination")
