How o astronomers gather information to establish the hubble law?

If you were to drop a bowling ball and a feather from the top of a building the bowling ball would hit the ground first due to

If an atom has 5 protons, 5 neutrons, and 3 electrons, what is the atom's charge? +2 -2 0 -3

According to newton's third law of motion, when a hammer strikes and exerts force to push it into a piece of wood, the nail A. creates a friction with the hammer B. exerts an equal force on the wood C.

If the mass of the spacecraft were doubled, how much would the force of gravity would change?

B1. A stone is dropped from the cliff. If the height of the cliff is 200cm. (a) calculate (1) Potential energy after falling for 20 seconds

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.