What is the nature of force between two charges if q1+q2=0

friction force is the opposition to the motion of surfaces sliding across each other. what is one factor that affects the amount of friction?

The multiple reflection of a single sound wave is a/an a. reverberation. b. echo. c. diffraction. d. refraction.

Which best describes what happens to sunlight after it passes through the keyhole of a door?

An object has traveled 1500 meters in 18 seconds what is its average speed?

A 4 kg bar of metal weighs about 8.8 pounds. Approximately how much does it weigh in newtons?

You pull a simple pendulum of length 0.225m to the side through an angle of 3.50∘ and release it. Part A How much time does it take the pendulum bob to reach its highest speed? Take free fall acceleration to be 9.80 m/s^2.

What is the velocity of a wave having a frequency of 25 Hz and a wavelength of 10m

What is the force on a 1-kg ball that is falling freely due to the pull of gravity

Which would react chemically by forming an ionic bond? A. 2 chlorine atoms with 7 valence electrons each B. 1 neon atom with 8 valence electrons and 1 lithium atom with 1 valence electron C.

Which of these are considered an oxidizing mutagenic agent? x-rays benzopyrene gamma rays