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Consider a point charge with a charge Q, located at the origin, in an empty space. Let the electric potential be zero at infinity. Suppose that at a distance r from this charge, the magnitude of the electric potential and electric field are 74 V and 38 V/m, respectively. How many coulombs of charge, Q, are at the origin?
An intergalactic rock star bangs his drum every 1.30 s. A person on earth measures that the time between beats is 2.10 s. How fast is the rock star moving relative to the earth
The space shuttle orbits at a distance of about 300 km above the surface of the earth. Find the speed of the shuttle
Show that the sun is not at rest in the center of the solar system by calculating the distance from the Sun's center to the center of mass of the Sun-Jupiter system
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. He notes that it takes the wave 0.730 s to reach the opposite tower, 20.0 m away. If a 1 meter length of ..
A charged conducting sphere of radius 18 cm has 1012 electrons removed from its surface. What is the surface charge density of the sphere
A 0.145 kg baseball pitched at 39.0 m/s is hit on a horizontalline drive straight back toward the pitcher at 52.0 m/s. calculate the average force between the bat and ball during contest
A bicyclist rides 3.01 km due east, while the resistive force from the air has a magnitude of 7.71 N and points due west. Find the work done by the resistive force during the round trip
The frequency of sound wave from an ambulance is 2,400 Hz. The velocity of sound is 345.0 m/s. find the frequency of the siren heard by the observer
Four charges are placed on the corners of a square that lies in the first quadrant of the x-y plane with sides of length 3m. Find the force (magntude and direction) on the charge at the origin
The tires of a car make 69 revolutions as the car reduces its speed uniformly from 92km/h to 40km/h . The tires have a diameter of 0.80m. What was the angular acceleration of the tires
Although an ideal voltmeter has an infinite internal resistance, this theoretical ideal is usually not met in practice. The voltmeter has an internal resistance of 8 x 10^9 Ohms and is used to measure the voltage across the resistor R2.
An artificial earth satellite has a circular orbit of radius 5.91 106 m (which means it is orbiting approximately -450 km above the surface of the earth) in an equatorial plane. Find the satellite's instantaneous acceleration at time t. Magnitude? ..
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