The mass of the asteroid is 9000 kg, and it is

approaching Earth at 45 m/s. If the rocket has a mass of 1800 kg, what

velocity must it have to completely stop the asteroid after collision?

A. - 225 m/s

B. 306 m/s

c. 45 m/s

D. - 116 m/s

Why does a small particle size generally cause a reaction to proceed faster? a. the only reason is that there are more collisions per second. b. the collisions occur with greater energy. c.

If a woman weighs 125 lb, her mass expressed in kilograms is x kg, where x is

If an object has the the mass of 3kg, calculate the force acting on it.

Which of the following correctly describes Albert Einstein's interpretation of the photoelectric effect.

The ice in his drink has a mass of 6 g and a volume of 20 cm3. what is the density of the ice?

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.