1. I drop a little rock from the top of the tower and it takes 1.65 seconds to hit the ground. Calculate the velocity in m/s after 1.10 seconds of freefall and calculate the velocity at impact in mi/hr.

A block sits at rest on a table, 0.9 m above the ground. If the black has a six J of energy (with the ground set as zero height level), what is the mass of the block?

A scientist tests the water in a local pond and finds that it has a pH of 7.9. What is true about the water sample?

A 2.40 kg can of coffee moving at 1.50 m/s in the + x-direction on a kitchen counter collides head-on with a 1.20 kg box of macaroni that is initially at rest. After the collision the can of coffee is moving at 0.825 m/s in the + x-direction.

Which of the following is a speed, not a velocity? A. 35 m/s east B. 0-35 m/s C. 035 m/s D. 35 m/s south

When you set something down on the ground what kind of work are your arms doing

How could you make a sound wave have a lower pitch

Ice caps at the north and south poles are very reflective the ice reflects light and heat rather than absorbing it.

When you jump straight up as high as you can, what is the order of magnitude of the maximum recoil speed that you give to the Earth? Model the Earth as a perfectly solid object.

Consider the Sun and Earth as a single system. How does the law of conservation of energy apply to this system? A) The energy from the Sun that reaches Earth is destroyed by Earth.

Based on the law of conservation of energy, which statement is false Energy is lost when machines don't work right. We can't add more energy to the universe. We can't destroy energy that exists in the universe.