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It is desired to cool iron parts from 500°F to 100°F by dropping them into water that is initially at 55°F. Assuming all the heat from the iron is transferred to the water and that none of the water evaporates, how many kilograms of water are needed per kilogram of iron? In kg
Suppose that the aluminum cup inside a calorimeter has a mass of 48 g and contains 84 g of water. Both the cup and water are initially at a temperature of 5.6 degrees C, what is your best estimate of the specific heat of the aluminum
Consider the following vector fields: C=2x(x-direction), D=5x(y-direction), F=4s(phi-direction), G=3s(s-direction), For each field which could be magnetic, calculate the current density at the origin in two different ways
Vector A has components of +3 in the x-direction and -4 in the y-direction. Vector B has components -2 in the x-direction and +3 in the z-direction
A 6 m board of mass 5 kg is hinged at one end, with a 60 kg block nesting on the board 202 cm from the hinge. Find the force exerted by the hinge at this angle
A 55.0 kg crate rests on a level floor at a shipping dock. What horizontal pushing force is required to just start the crate moving
Suppose you hear a clap of thunder 15.80 s after seeing the associated lightning stroke. The speed of sound waves in air is 343-m/s, and the speed of light in air is 3.00x 10^8 m/s.
What is the speed of the bowl? The speed of sound is 340 meters per second.
A light ray is incident from air onto the surface of a very quiet lake. what is the index of refraction of the water
When she leaves the track, she follows the characteristic path of projectile motion. Ignoring friction and air resistance, find out the maximum height H to which she rises above the end of the track.
A woman stands on a scale in a moving elevator. Her mass is 69.5 kg, and the combined mass of the elevator and scale is an additional 815 kg. What does the scale read during the acceleration
Calculate both absolute and relative pressure on the bottom of the tank if the meniscus (mercury surface) of the leg opening in the open air is a / 100 mm above the other b / 100 mm below the other.
What fraction of the power radiated by the sun is intercepted by the planet Mercury? The radius of Mercury is 2.44 x 106 m, and its distance from the sun at the moment is 5.75 x 1010 m. presume that sun radiates uniformly in all directions.
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