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What is the magnitude of the electric field midway among two point charges, -17.0 C and +12.1 C, that are 7.52 cm apart? What is the direction of the electric field?
At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 5.03 m/s. What is the minimum time that a player must wait before touching the ball
A 0.1m long solenoid has a radius of 0.05m and 1.5x10^4 turns. The current in the solenoid changes at a rate of 6.0A/s. A conducting loop of radius 0.0200m is placed at the center of the solenoid by its axis the same as that of the original solenoid.
Two charged objects experience a mutual repulsive force of N. If the charge of one of the objects is reduced by a factor of and the distance separating the objects is increased by a factor of , what is the new force?
Two people with a combined mass of 120 kg hop into an old car with worn-out shock absorbers. This causes the springs to compress by 7.44 cm. Find the total load supported by the springs
Two stars located 22 light-years from Earth are barely resolved using a reflecting telescope having a mirror of diameter 66 cm. find the separation between the stars
If a freight train can accelerate at 0.050 m/sec2, how far must it travel to increase its speed fro 2.0 to 8.0 m/sec?
the equilibrium separation of H atoms in the H2 molecule is 0.074nm. Calculate the energies and wavelenghts of photons
A wheel of mass m = 16kg and radius r = 0:5m is connected to a motor that causes it to attain rotational speed of w = 20rads^-1 in 10s, What is the average torque applied to the wheel by the motor
Suppose you are climbing up stairs, gaining 10 meters of height per minute. In order to do that, your body has to do some work, using energy, at a given rate. What is the power produced by your body? Ignore energy losses.
A beam of gamma rays from a distant galaxy is observed through two polarizing filters whose transmission axis is at a 45 degree angle relative to each other here on earth
An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 500-g sample of silver at an initial temperature of 85°C is placed in the water. Calculate the mass of the aluminum cup
Light of wavelength 500.0nm appears to have a wavelength of 500.2nm when it reaches Earth from a distant star. Discover the velocity of the star if the speed of light is 3.00 x 10^8 m/s.
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