Determine the mechanical energy of this object: a 1-kg pendulum has a speed of 2 m/s at a height of 1 meter.

A. 9.8 J

B. 11.8 J

C. 2 J

D. 7.8 J

A small, low-mass remnant star that has exhausted all the fuel to perform nuclear fusion is:

Who made the very first solar cell and in what year?

A 300.0 W immersion heater is used to heat 0.250 kg of water from 10.0 °C to 70.0 °C. About how many seconds did this take? (There are 4186 Joules per kcal.)

Suppose that you wanted to close a door by throwing a ball at the door. one ball will bounce off the door in a perfectly elastic collision while the other ball is made of clay and will stick to the door.

While going 60 mph, how many feet will it take you to stop? A. 180 B. 600 C. 360 D. 120

How do you solve for weight in physical science?

Gravity and magnetism are _ forces. A. contact B. field C. tension D. normal

a) What voltage will accelerate electrons to a speed of 6.00*10-7m/s? (b) Find the radius of curvature of the path of a proton accelerated through this potential in a 0.

A proper cool-down routine includes which of the following?

What is a Rift Valley?