An object which has a mass of 70 kg is sitting on a cliff 10m high calculate the objects potential energy. given g=10m/s^2 a.7,000 joules b. 3,500 joules c. 700 joules d. 70 joules e. 35 joules

Aparticle moves in the xy plane with constant acceleration. at time zero, the particle is at x = 6 m, y = 8.5 m, and has velocity ~vo = (9 m/s) ˆı + (−2.5 m/s) ˆ . the acceleration is given by ~a = (4.5 m/s 2 ) ˆı + (3 m/s 2 ) ˆ . what is the x component of velocity after 3.5 s? answer in units of m/s.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.