A merry-go-round rotates with a centripetal acceleration of 15 m/s2. If the

outer horses are 7 m from the center of the ride, what is their velocity?

O

A. 11.8 m/s

O

B. 10.2 m/s

O

O

C. 9.6 m/s

D. 8.4 m/s

After data are collected they are often arranged in a

Assuming that only air resistance and gravity act on a falling object, we can find that the velocity of the object, v, must obey the differential equation dv m mg bv dt  .

What is required to bring about phase change?

If you want to conduct an electrical current, which situation would produce a solution capable of this? A) Dissolving water in oil. B) Dissolving sugar in water. C) Dissolving solid NaBr in oil. D) Dissolving solid NaF in water.

It took 1700 J of work to stretch a spring from its natural length of 2 m to a length of 6 m. Find the spring constant k.

9. An astronaut of mass 90 kg walks in space outside her spaceship and receives a 30-N force from a nitrogen spurt gun. What acceleration does she experience?

Which of the following describes the charge of an atom before any electrons are transferred? positive charge negative charge it depends on the number of protons and neutrons neutral charge

A slow jogger runs a mile in 16 minutes. Calculate the speed in

Protecting his nest, a 600-g peregrine falcon rams a marauding 1.5-kg raven in midair. the falcon is moving at 20.0 m/s, and the raven at 9.00 m/s at the moment of impact.

A carousel has a radius of 1.70 m and a moment of inertia of 110 kg · m2. A girl of mass 44.0 kg is standing at the edge of the carousel, which is rotating with an angular speed of 3.40 rad/s.