Educational level of parents (high school grad, college grad, Ms, PhD) What type of variable and classification is this?

What is the frequency of a light wave with a wavelength of 620nm

Which two objects have the greatest gravitational force acting between them

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