What is the most important reason to control the conditions of an experiment?

Why does cupping your hand around your ear improve your hearing?

You drop a rock off of a building. It takes 4.5s to hit the ground. How tall is the building?

50 meters In 3 seconds, what is the average speed (velocity)

When an object accelerates, what about its motion changes? Question 1 options: Speed must change, but not velocity. Both speed and velocity must change. Velocity must change, but not speed. Neither speed or velocity can change

Vanadium metal has a molar heat capacity of 24.9 J/mol·K. Given that q = Cm * n * ΔT, how many moles of vanadium are present if 3.27 ✕ 103 J of heat is required to raise the temperature of the sample by 36.7 K?

What is constant acceleration?

What is the best conductor of electricity? A. aluminum B. gasoline C. protien D. lipids

A container of water is lifted vertically 3.0m

Newton's second law of motion addresses the relationship between what two variables that influence the force on a body? A. Mass and acceleration B. acceleration and inertia C. Inertia and mass D. Acceleration and velocity

across a rough, horizontal surface. The chair's mass is 18.8 kg. The force you exert on the chair is 165 N directed 26 degrees below the horizontal. While you slide the chair a distance of 6.00 m, the chair's speed changes from 1.30 m/s to 2.50 m/s.