While a gymnast is in the air during a leap, which of the following quantities must remain constant for her? A) Angular momentum about her center of massB) positionC) velocityD) momentumE) angular velocity

Which of the following objects has the most kinetic energy? a car going 60 miles per hour a spring that is compressed a rock sitting on the edge of a cliff a bicycle going 10 miles per hour

You are given two carts, a and b. they look identical and you are told that they are made of the same material. you place a at rest on an air track and give b a constant velocity directed to the right so that it collides elastically with a.

A car experiences a centripetal acceleration of 4.4 m/s ^2 as ur rounds a corner with a speed of 15 m/s. What is the radius of the corner?

Why shouldn't we look at the sun directly? 100pts

Water has a much higher specific heat than most other covalent compounds. What do you predict might happen if water had a low specific heat instead?

The correctly balanced equation for H2O2 → H2O + O2 is

How would an unbalanced chemical equation convey misleading information about what took place during a chemical reaction?

A car rounds a 75-m radius curve at a constant speed of 18 m/s. a ball is suspended by a string from the ceiling the car and moves with the car. the angle between the string and the vertical is:

Emission of light from an atom occurs when an electron

Which is an example of transfroming potential energy to kinetic