A rock is dropped from a height of 80 m and is in free fall what is the velocity of as it reaches the ground 4.0 seconds later

Why do you think the velocity of the center of mass does not change

Shows the number and type of atoms present in the smallest representative unit of a substance.

List five uses of electromagnets identified in the article. Made-to-Order Magnets.

A transverse wave with a frequency of 125 Hz is traveling in the x-direction. How long will it take this wave to travel 3000 m in the x-direction? 0.42 seconds 2.0 seconds 2.4 seconds 4.8 seconds

Two cars of the same mass have different velocities. Which car has more momentum

Under what condition (s) will an object be in equilibrium? Notice that equilibrium in physics has a broader definition. (A) Only if it is moving with constant velocity. (B) Only if it is at rest.

If a pressure gauge measure an increase in 3*10^ (5) Pa on an area of 0.7 m^2, calculate the increase in the force applied to the area?

Which of the following is an example of potential rather than kinetic energy? a. water rushing over Niagara Falls b. a molecule of glucose c. a crawling beetle foraging for food d. light flashes emitted by a firefly

If a force of 15 newtons [N] is applied to a surface and the pressure is measured as 4,000 pascals [Pa], what is the area of the surface in units of square milimeters [mm2 ]?

An engineer has the task of producing an aluminum alloy with a density of 3.0 grams per cubic centimeter. She comes up with the perfect alloy and saves a sample of it. Which mass and volume measurements correspond to this sample? 7 g and 2.