Find the magnitude of the force needed to accelerate a 220 g mass with a⃗ = -0.205 m/s2 i^+0.400 m/s2 j^.

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

The mass of a bowling ball is 10 kg and the mass of a ping pong ball is 0.015 kg. if the two objects are 5 meters apart, what is the gravitational force ?

Why do atoms emit energy of only specific wavelengths