Suppose you put in 100 j of work on a lever and get out 93 j of work. what is the efficiency of the lever and how much of the work input is lost as heat in joules?

Explain how a mug of tea is heated in a microwave oven. Explain why the tea gets hotter than the mug

Which of the following statements are true? Check all that apply. a. Electric charge is quantized. b. Two positive charges attract each other. c. A positive charge and a negative charge attract each other. d. Two negative charges repel each other. e.

Light passes straight through two polarizing filters in which the axis of polarization of the second filter is rotated 45 degrees compared to the first filter.

Questions A bowling ball moves 18 meters every 2 seconds down the lane at a bowling alley. What is the speed of the bowling ball? A 18 meters per second B 9 meters per second C 2 meters per second D 36 meters per second

Which of the following would reduce the resistance of a metal wire? increasing its length increasing its temperature increasing its thickness all of the above

What are the arrangement of resistors in series

A pilot flies horizontally at 1300 km/h, at height h! 35 m above initially level ground. However, at time t! 0, the pilot begins to fly over ground sloping upward at angle u! 4.3° (Fig. 2-38).

A helicopter flies 30 km 30 degrees north of east, drops of the supplies to a research team; it then heads 50 degrees north of west traveling 70 km to drop the supplies to a filming crew. What is the resultant displacement of the helicopter?

Plaskett's binary system consists of two stars that revolve in a circular orbit about a center of mass midway between them. This statement implies that the masses of the two stars are equal (see figure below).

Is mercury (the planet) rocky or gaseous (meaning relating to or having the characteristics of a gas.)