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The diagram shows a girl lifting a box of welght 50 N from a low shelf to a high shelf.

high shelf

low shelf

11.8m

50N

0,6 m

How much work is done on the box?

A. 30J

B. 60J

C. 90J

D. 120J

Consider three drinking glasses. All three have thesame area base, and all three are filled to the same depth withwater. Glass A is cylindrical. Glass B is wider at the top than atthe bottom, and so holds more water than A.

A car travels 3 km in 2 min. What is the velocity of the car?

Tracy pushes a block up an inclined plane to a height of 1.0 m. If Tracy puts 475 J of work into the system, but only 450 J are used to elevate the block, what is the efficiency of the inclined plane? A. 95% B. 106% c. 925) OD 25 J

Which pair of vectors below, if summed, would create a state of equilibrium (a resultant of 0i + 0j) ? a. 0i + 0j and 2i - 2j b. 2i + 2j and 2i - 2j c. 2i + 2j and - 2i - 2j d. 2i + 0j and 0i + 2j

Which type of wave does NOT have a crest? an electromagnetic wave a transverse wave a longitudinal wave an oscillating wave

What are at least three types of energy involving a microwave

1. At one time, people thought that heat was a substance called

How are magnet'so magnetic force and magnetic field different

Ahmed saw all of these things as he walked to school this morning. Which one is an example of a force pushing downward toward the ground? A. A bird sat on a telephone wire. B. A woman moved her child from one place to another in a wagon. C.

What types of mediums are involved in the energy transfer