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A 20g 12cm long wire is suspended horizontally between the poles of a horseshoe magnet. When the 0.51A current in the wire is turned on, the wire jumps up and out of the magnet.
Determine the minimum magnetic field needed to wire to jump up and out of the magnet.
Two identical cars (m = 1350 kg) are traveling at the same speed of 28.0 m/s. estimate the magnitude of the total momentum of the two cars
A hydrogen atom in the n= 2 state absorbs a photon with wavelength 486nm. Find the change in the orbiting electron's kinetic energy
In a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves on a circle. Determine the angle of the total acceleration relative to the radial direct..
In coming to a stop, a car leaves skid marks 85 m long on thehighway. Assuming a deceleration of 4.0 m/s2,estimate the speed of the car just before braking.
A rock of mass 150g is thrown vertically up into the air with a speed of 15 m/s. How high will it travel?
a crate weighing 6.90 103 n is pulled up a 37deg incline by a force parallel to the plane. if the coefficient of
a beam of white light makes an angle of incidence of 38deg with a glass prism of index of refraction of 1.5 and
Water flows through a fire hose of diameter 5.49 cm at a rate of 1.2 x10-2 m3/s. The fire hose ends in a nozzle of inner diameter 2.11 cm. What is the velocity with which the water exits the hose?
Dermatologists often remove small precancerous skin lesions by freezing them quickly with liquid nitrogen, which may have a temperature as low as 78.1 K. What is this temperature on the (a) Celsius and (b) Fahrenheit scales?
A polonium nucleus, while at rest, decays into a lead nucleus of rest mass 342.1126 x 10^-27 kg, and emits a helium nucleus of rest mass 6.6483 x 10^-27 kg. Determine the rest mass of the Polonium nucleus
A wall of a warehouse of dimensions 8 feet by 20 feet is made of concrete block of R-value 2 and an inside layer of foam insulation of R-value 10. When the outside temperature is 30°F and the inside temperature is 70°F.
A ball of aluminum is at a depth of 100.0 m under water whose density is 1,000 kg/m3. The bulk stress on the ball due to the water is
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