a skate boarder starts from rest and accelerates a distance of 485 m reaching a final velocity of 20 m/s. How long does it take?

A main sequence star cools and expands. It must be entering which stage? A. white dwarf B. black dwarf C. red giant D. neutron star ... ?

According to Newton's law of universal gravitation, which of these objects would have the strongest gravitational force? a golf ball a mirror a queen-sized bed a basketball

The First Quarter Moon always occurs when A. the Moon is directly opposite the position of the Sun. B. when the Moon is closer to the Sun than the Earth is. C. on the 7th or 8th of every month. D.

What piece of laboratory equipment would you use to measure mass?

The volume of 1 kg of helium in a piston-cylinder device is initially 5 m3. Now helium is compressed to 2 m3 while its pressure is maintained constant at 174 kPa.

Compare and contrast between reflection and refraction

You push a friend sitting on a swing she has a mass of 50 kg and accelerates a rate of 4 m/s2 find the force you exerted

What must be true about tow objects if heat is flowing between them?

Will a 2 liter bottle of coke have a different density than a one liter bottle of coke?

A positive rod is placed to the left of sphere A, and the spheres are separated