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## 400 Meter Dash

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An athlete runs around a 400 meter track in 60 seconds, starting and finishing at the same place. What is her speed and velocity in m/s?

## Irresistible Resistors

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Three identical 12 ohm resistors are connected in parallel to a 8V battery. What is the total power dissipated in the circuit?

## Simple Harmonic Motion

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An object undergoing simple harmonic motion is observed to have a time interval of 4 seconds between the two extremes of its displacement from equilibrium. What is the frequency of this motion?

## Fluid Motion

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An object of mass 3 kg floats motionless in a fluid of specific gravity 0.8. What is the magnitude of the buoyant force? (Use g = 10 m/s2).

## Don’t Weigh Yourself Down

In which situation would a person would weigh the most?

## Tilt Table

A tilt table test is used to verify if a patient has low pressure drops associated with syncope. The heart, of a horizontal patient, pumps blood at a mean arterial pressure of 90 mmHg (12 kPa). The patient faints as soon as the tilt table goes vertical, this means the blood acceleration equal the gravitational acceleration. If the heart rate does not increase to compensate for the change in angle, at what angle would the blood be pumping one half its horizontal pressure.

## Coulomb’s Law Equivalent

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The constant k, which appears in the equation for Coulomb’s law, is equivalent dimensionally to which of the following?

## Magnitude of the Force

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Consider the following diagram which reveals a positive test charge that is located between two charged spheres, X and Y. Sphere X has a charge of +3Q and is located 0.6 meters from the test charge. Sphere Y has a charge of -3Q and is located 0.3 meters from the test charge.

If the magnitude of the force on the test charge due to sphere X is F, what is the magnitude of the force on the test charge due to sphere Y?

## Electric Charge

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Three metal spheres X, Y and Z, are identical in size but carry differing electric charges of –Q, +2Q and -3Q, respectively. The first metal sphere X is brought into contact only with the sphere Y, and then X is brought into contact only with sphere Z. After X makes contact with spheres Y and Z, in the order described, the charge on sphere X is most consistent with which of the following?

## Direction of Magnetic Force

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The direction of the magnetic force on a current carrying wire located in an external magnetic field is which of the following?