June 2006, Part 3 Printer Friendly Version
41 Which two quantities can be expressed using the same units?

42 What is the magnitude of the electric field intensity at a point where a proton experiences an electrostatic force of magnitude  2.30 × 10–25 newtons?
43 Pieces of aluminum, copper, gold, and silver wire each have the same length and the same cross-sectional area. Which wire has the lowest resistance at 20°C?
44 A volleyball hit into the air has an initial speed of 10. meters per second. Which vector best represents the angle above the horizontal that the ball should be hit to remain in the air for the greatest amount of time?
45 A box is pushed to the right with a varying horizontal force. The graph below represents the relationship between the applied force and the distance the box moves.

What is the total work done in moving the box 6.0 meters?
46 The diagram below represents two pulses approaching each other.

Which diagram best represents the resultant pulse at the instant the pulses are passing through each other?
47 Which graph best represents the relationship between the strength of an electric field and distance from a point charge?
48 A 512-hertz sound wave travels 100. meters to an observer through air at STP. What is the wavelength of this sound wave?
49 Compared to the speed of microwaves in a vacuum, the speed of x rays in a vacuum is
50 Which type of photon is emitted when an electron in a hydrogen atom drops from the n = 2 to the n = 1 energy level?
51 A lithium atom consists of 3 protons, 4 neutrons, and 3 electrons. This atom contains a total of

Refer to the following information for the next two questions.

A 10.-kilogram block is pushed across a floor by a horizontal force of 50. newtons. The block moves from point A to point B in 3.0 seconds.

 59 Using a scale of 1.0 centimeter = 1.0 meter, determine the magnitude of the displacement of the block as it moves from point A to point B. [1]

 60 Calculate the power required to move the block from point A to point B in 3.0 seconds. [Show all work, including the equation and substitution with units.] [2]

Refer to the following information for the next three questions.

A 3.0-kilogram object is placed on a frictionless track at point A and released from rest. (Assume the gravitational potential energy of the system to be zero at point C.)

 61 Calculate the gravitational potential energy of the object at point A. [Show all work, including the equation and substitution with units.] [2]

 62 Calculate the kinetic energy of the object at point B. [Show all work, including the equation and substitution with units.] [2]

 63 Which letter represents the farthest point on the track that the object will reach? [1]

Refer to the following information for the next three questions.

A car on a straight road starts from rest and accelerates at 1.0 meter per second2 for 10. seconds. Then the car continues to travel at constant speed for an additional 20. seconds.
 64 Determine the speed of the car at the end of the first 10. seconds. [1]

 65 On the grid in your answer booklet, use a ruler or straightedge to construct a graph of the car’s speed as a function of time for the entire 30.-second interval. [2]

 66 Calculate the distance the car travels in the first 10. seconds. [Show all work, including the equation and substitution with units.] [2]

Refer to the following information for the next two questions.

A student standing on a dock observes a piece of wood floating on the water as shown below. As a water wave passes, the wood moves up and down, rising to the top of a wave crest every 5.0 seconds.

 70 Calculate the frequency of the passing water waves. [Show all work, including the equation and substitution with units.] [2]

 71 Calculate the speed of the water waves. [Show all work, including the equation and substitution with units.] [2]

Refer to the following information for the next question.

The diagram below shows two resistors, R1 and R2, connected in parallel in a circuit having a 120-volt power source. Resistor R1 develops 150 watts and resistor R2 develops an unknown power. Ammeter A in the circuit reads 0.50 ampere.

 72 Calculate the amount of charge passing through resistor R2 in 60. seconds. [Show all work, including the equation and substitution with units.] [2]