“I'm sorry you're in so much pain.” “I can't even imagine what you're going through. ...
“You're not alone.”
“I'm here for you.” The caveat here is to only say it if you mean it, and are willing to help the person out in any way you can.

Aballet student who learns with the of his instructor is demonstrating learning.

An object in mechanical equilibrium is an object

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2