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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 87 °C is placed in the water. The stirrer is used to stir the mixture gently until it reaches its final equilibrium temperature of 32 °C. Calculate the mass of the aluminum cup.
A charge of +q is situated at the origin, while an identical charge is located on the x axis at x = 0.58 m. A third charge of +4q is located on x axis at such a place that the net electrostatic force on the charge at origin triples.
Conversations with astronauts on the lunar surface were characterized by a kind of echo in which the earthbound person's voice was so loud in the astronaut's space helmet, Calculate the distance from Earth to the Moon
A monatomic ideal gas at high temperature T in a discharge tube has a triply degenerate excited state at an energy e above the ground state, Find the ratio population of the excited state to that of the ground state
Find out the tension in the strap, given that the suitcase moves with constant speed and that the coefficient of kinetic friction between the suitcase and the floor is 0.40.
A package is dropped from a passing plane (moving in the horizantal direction) and produces a projectile motion as it is falling to the ground. If it takes the package only 32.12 seconds until it hits the ground, how far above the ground was the plan..
the electric flux is 300Nm^2/C through two opposing faces of a 2cm x 2cm x 2cm box. How much charge is inside the box
a proton moves in a circle with a speed of 280 m/s through a uniform magnetic field of 2t directed perpendicular to the circular path. compute the orbital radius of the proton
A giant yo-yo of mass 360 kg measuring about 1.5 m in radius was dropped from a platform 60 m high, find the velocity of descent at the end of the fall
A rock is thrown off a bridge of height 75m. at an angle theta=25 degrees with respect to the horizontal. The initial speed of the rock is 15 m/s. compute the maximum height reached by the rock?
Two cylinders have the same radius R = 0.6 m and length 0.6 m, but one is a solid cylinder of massM1 = 4.5 kg, What is the ratio of the final speed of the solid cylinder to that of the hollow cylinder
The tension in a string is 20.6 n and its linear density is .649 kg/m. A wave on the string travels in the -x direction. It has amplitude of 3.71 cm and a frequency of 10.6 hz. What are the speed and wavelength of wave.
The driver of an 1800 {kg} car travelling on a horizontal road at 100 kmh suddenly applies the brakes. Because of a slippery pavement, the friction of the road on the tires of the car, which is what slows down the car, is 20.0 percent of the weight o..
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