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A very fast-moving train car passes you, moving to the right at 0.50c. You measure its length to be 12m . Your friend David flies past you to the right at a speed relative to you of 0.80c.
How long does David measure the train car to be?
A potential difference V is applied to a wire of cross section A, length L, and resistivity ?. You want to change the applied potential difference, What should be the new values of L and A in terms of the old values
A piece of glass has a temperature of 73.0 °C. Liquid that has a temperature of 37.0 °C is poured over the glass, determine the specific heat capacity of the liquid
A parallel plate capacitor has a capacitance of 6.3 µF when filled with a dielectric. evaluate the dielectric constant of the dielectric
A transformer is designed to change 120 V into 10,000 V, and there are 164 turns in the primary coil. How many turns are in the secondary coil
It takes 2.80 s for a small ball with a mass of 0.060 kg released from rest from a tall building to reach the ground. Calculate the height from which the ball is released
A near-sighted person's eyeglasses has a focal length of ? 22.0 cm, and the lens is 1.8 cm from the eye. what should be the focal length of the corresponding contact lens
In February 1955, a paratrooper fell 370 m from an airplane without being able to open his chute but happened to land in snow, find the magnitude of the impulse on him from the snow
An emf is induced in a conducting loop of wire 1.11m long as its shape is changed from square to circular.Find the average magnitude of induced emf if the change in shape occurs in 4.03s and the local 0.135-T magnetic field is perpendicular to the ..
After the NEAR spacecraft passed Mathilde, on some occasion's rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid Eros, final destination for the mission.
An antifreeze solution is made by mixing ethylene glycol (? = 1130 kg/m3) with water. determine the volume percentage of ethylene glycol in the solution
If the mass of both weights is 225 gm, the first mass is located 20 north of east, the second mass is placed 20 south of east, and the transducer sensitivity is 0.5 volts/Newton, how large a voltage do you expect to measure? suppose the transducer..
A rectangular loop of wire carrying a 4.0-A current is placed in a magnetic field of 0.60 T. What is the area of this loop
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