Which of the following processes charges an object by friction

One 10.0 amp resistor is wired in a series with two 10.0 amp resistors in parallel. A 45.0 C battery supplies power to the circuit. What is the total current through the circuit?

If a force of 65 N is exerted on a 45 kg sofa and the sofa is moved 6.0 meters, how much work is done in moving the sofa? 17,550 J 171.990 J 390 J none of the above

Suppose you want to search for brown dwarfs using a space telescope. Will you design your telescope to detect light in the ultraviolet or the infrared part of the spectrum? Why?

What is the displacement if Ray runs 30ft north, 30ft west, and then 30ft south.

For a rope obeying Hooke's law show that the elastic potential energy stored in the rope is given by E=1/2kx^2 where k is the elastic spring constant and x is the extension.

Is it legal in Florida for a math teacher forces the kids to do push ups?

Acceleration is best defined as the rate of change of blank of an object

Zirconium has an atomic number of 40. How many neutrons are there in an isotope of zirconium-92?

If a glass is knocked off of a table that is 1.4m tall, how long does it take for the glass to hit the ground?

Imagine riding On a merry-go-round at the center. As you walk to the outer edge, the merry-go-round slows in order to conserve angular momentum. True or false?