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19 Cards in this Set
- Front
- Back
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A scientist adds two distances together, performing the calculation 9.62 m + 0.94 m. Which of the following results has the correct number of significant digits? |
A. 10.56 m |
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A car’s odometer indicates the number of miles traveled by the car over the various roadways upon which it has been driven. This value would be described as what by a physicist? |
D. distance |
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At a constant speed of 27.0 km/h how far will a car travel in 1.50 s? |
A. 11.3 m |
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What is the stopping distance of a car with initial speed 10.0 m/s that decelerates uniformly at a rate of 2.0 m/s2? |
B. 25 m |
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Starting from rest a cyclist attains a speed of 8.00 m/s over a distance of 12.0 m. Determine the rate of acceleration. |
B. 2.67 m/s2 |
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Convert 65 cm into units of meters: |
B. 0.65 m |
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A book rests upon the top of a table. The gravity acting on the book is 15 N downward. If this is the “action”, what is the “reaction”, according to Newton’s 3 rd Law of Motion? |
D. The book exerts a force of 15 N upward on the Earth. |
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A net force of magnitude 0.50 N acts of an object with mass 250 grams. The magnitude of theobject’s acceleration is: |
D. 2.0 m/s2 |
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What is the mass of an object that weighs 25 N? |
B. 2.55 kg |
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A block of mass 10.0 kg rests upon a ramp where the coefficient of static friction is 0.45. The ramp is inclined 20.0º relative to horizontal. A rope parallel to the surface is used to pull the block up the ramp. What is the minimum tension in the rope that will start the block moving? |
C. 75.0 N |
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A ball of mass 2.00 kg is launched straight up with kinetic energy equal to 100.0 J. What is the maximum height to which it will travel above its launch point? |
A. 5.10 m |
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A glass rod becomes positively charged when rubbed by a silk cloth. Which of the following explains how this occurs and what happens to the silk? |
B. Electrons are removed from the rod and the silk becomes negatively charged. |
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A negatively charged particle is located a distance d from a second negatively charged particle. What happens to the electrostatic force between the two particles if the separation is doubled so that the particles are now a distance 2d apart? |
A. The force is one fourth its original value. |
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Current in amount 2.0 A flows through a certain resistor when it is attached to a 3.0 V battery. What is the resistance of this resistor? |
C. 1.5 Ω |
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A certain bulb has power equal to 25.0 W when connected to a 12.0 V battery. What current passes through the bulb? |
C. 2.1 A |
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A certain pair of resistors connected in parallel has an effective resistance of 10.0 Ω. If one of theseresistors is 12.0 Ω, what is the resistance of the other? |
A. 60.0 Ω |
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A certain radio transmitter broadcasts at wavelength 3.0 m. What is the frequency of this radio wave? |
C. 100 MHz |
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Which of the following describes sound? |
Sound is a longitudinal wave consisting of compressions and rarefactions. |
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Two loudspeakers create the same sound wave with wavelength 0.50 m. The two speakers move in phase with one another. Now suppose a microphone is placed at a point such that it is 1.60 m from one speaker and 2.35 m from the other. What occurs at the microphone? |
Destructive interference and a relatively soft sound occur at the microphone. |
