Calculate the initial temperature of the hot horseshoe
A hot iron horseshoe (mass = 0.340 kg) which has just been forged, is dropped into 1.71 L of water in a 0.310 kg iron pot initially at 19.3oC. If the final equilibrium temperature is 24.8oC, calculate the initial temperature of the hot horseshoe.
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A circular loop in the plane of the screen lies in a 0.72 T magnetic field pointing into the screen. The loop's diameter changes from 18.5 cm to 6.0 cm in 0.50 s. What is the magnitude of the average induced emf?
A block of mass 6.2 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of 42.0 N at an angle 22.4° above the horizontal. What is the magnitude of the acceleration of the block?
The loop is in a uniform magnetic field of magnitude 89.0 mT whose direction is parallel to the current in the 130 cm side of the loop. What are the magnitude of the magnetic forces on each of the three sides?
The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From what height did the student fall? Assume that the only force acting on him during the collision is that due to the g
Water in a 0.310 kg iron pot initially at 19.3oC. If the final equilibrium temperature is 24.8oC, calculate the initial temperature of the hot horseshoe.
Imagine a frictionless pulley (a solid cylinder) of unknown mass M and radius r = 0.200 m which is used to draw water from a well. A bucket of mass m = 1.50 kg is attached to a massless cord wrapped around the pulley. The bucket starts from rest a
The bright fringes are found to be separated by a distance of 0.1 mm. Planck's constant is 6.63 × 10 -34 J · s. What is the kinetic energy of the electrons in the beam? Answer in units of keV.
You fire a gun horizontally that is 25.0 m off the ground and the bullet goes at 200.0 m/s. What is the time it takes for the bullet to hit the ground, how far down range does the bullet travel, and what is the resultant velocity (in m/s) and fina
You are given a vector in the xy plane that has a magnitude of 84.0 units and a y component of -53.0 units. What are the two possibilities for its x component?
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