A car is moving on a circular path of radius 100 m. Its speed v is changing with time as v = 2t2, where v is in ms–1 and t in second. The acceleration of car at t = 5s is approximately:.

Why does the input force have to be greater than the force needed to lift the bale?

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity

He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is