What is the velocity (in m/s) of a 550 kg roller coaster cart at the bottom of the track if it started with 990,000 J of gravitational potential energy at the top of the track? Assume a frictionless surface.

How do convection currents form in air?

In which of these positions will earth move the fastest

According to Archimedes principle, if an object s weight is greater than the weight of the fluid displaced, the object will float? True or false?

The radius of the sun is about 700,000,000 meters, the radius of the planet Venus is about 6,000,000 meters, and the radius of the supergiant star Betelheuse is about 500,000,000,000 meters. Which of these statements is true (t) or false (f) ? A.

A wave is traveling through a medium ad it travels it displaces particles of matter in the same direction as the wave is traveling this type of wave is a

Why is a block of gold is more dense than a block of iron of equal size?

How much work is required to uniformly accelerate a merry-go-round of mass 1490 kg and a radius of 7.80 m from rest to a rotational rate of 1 revolution per 8.33 s? Model the merry-go-round as a solid cylinder (I = ½ MR2).

What percentage of North American adults may be functioning below their potential due to prolonged exposure to stress

Give a example of frequency which an elephant can hear and a tiger cannot hear include a unit in ansawer

Why do you keep moving forward when you slam on the brakes of your bike?