Suppose you are trying to push a car that won't start to a mechanic. If it has a mass of 900 kg, how hard will you need to push it to get it to accelerate at 0.5
m/s^2?

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

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.

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished