The two dry sand samples are examined by changing one parameter. The independent variable, the one that is intentionally manipulated between the two samples, is the (temperature over time, mass of each sample, or type of material used)

A ball with mass of 0.050 kg is dropped from a height of h1 = 1.5 m. It collides with the floor, then bounces up to a height of h2 = 1.0 m. The Collison takes 0.015 s. Use part e to Calculate impulse (J) ? Write the formula first.

What did the results of photoelectric-effect experiments establish? A) Electrons are emitted as soon as low-intensity, high-frequency light hits a metal surface. B) Electrons are never emitted if low-intensity light waves strike a metal surface.

A student dissolves 24.2 g of NaCl in 500 mL of water. Another student dissolved 24.2 g of KI in 500 mL of water. Why do the two solutions have different molarities? a) The volumes of the solutes differ. b) The compounds have different molar masses.

What is an example of chemical potential energy in humans?

Which statement correctly describes the movement of thermal energy according to the second law of thermodynamics? The natural tendency of systems is for heat to flow from a cooler object to a warmer one.

A car has an initial velocity of 11.2 m / sec. the car accelerates at 10.0 m / s2 for 8.0 seconds. what is the velocity of the car at the end of the 8.0 seconds?

You're going to open the door further by giving it a brief, hard push. first, you'll push the door at its center. then, you'll push it near the door knob. both pushes are equally hard, and last the same length of time.

In which phenomenon does Earth's magnetic field play an important part? A retaining gases around Earth to form the atmosphere B. stratifying the atmosphere into layers c. movements of tectonic plates D. spreading of the sea floor E.

Make sure that you spend extra time warming up during - O O A. spring B. cold weather O c. the afternoon O D. a heat wave

Which of these forces could speed up a baseball? A) Applied and Frictional forces B) Applied and Gravitational forces C) Frictional and Gravitational forces