The accepted value for the speed of light in a vacuum is 2.99792458 x 10 ms. three groups of students made independent measurements of the speed of light ca (2.9870.002) x 10 ms-1 cg = (2.997 ± 0.005) × 108 ms-1 cc = (2.8999 ± 0.0005) × 108 m s-1 state which of the measurements is the most (i) accurate (ii) precise

Aplanet of mass m 6.75 x 1024 kg is orbiting in a circular path a star of mass m 2.75 x 1029 kg. the radius of the orbit is r 8.05 x107 km. what is the orbital period (in earth days) of the planet tplanet?

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Auniform crate c with mass mc is being transported to the left by a forklift with a constant speed v1. what is the magnitude of the angular momentum of the crate about point a, that is, the point of contact between the front tire of the forklift and the ground