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.

The main difference between a series and a parallel circuit is that a. more components can be added to a parallel circuit. b. the voltage source for a series circuit can be weaker. c. in a series circuit there's only one path for current to flow. d.

The speedometer of your car measures average speed?

You hold a bucket in one hand. in the bucket is a 500 g rock. you swing the bucket so the rock moves in a vertical circle 2.6 m in diameter.

77. There is a 250-m-high cliff at Half Dome in Yosemite National Park in California. Suppose a boulder breaks loose from the top of this cliff. (a) How fast will it be going when it strikes the ground? (b) Assuming a reaction time of 0.

When passing from a low index of refraction medium to a high index of refraction medium which way does the refracted ray bend: toward the normal or away? Explain.

Explain how latitude determines wind patterns

What is the difference between contact forces and forces that act through a force field?

Suppose two parallel-plate capacitors have the same charge Q. but the area of capacitor 1 is A and the area of capacitor 2 is 2A. 1.

You want to launch a stone using the elastic band of a slingshot. The force that the elastic band applies to an object is given by F = - α∆s4, where α = 45 N m4 and ∆s is the displacement of the elastic band from its equilibrium position.

Which of the following statements regarding emails is true