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A student drops two metallic objects into a 120-g steel container holding 150 g of water at 25°C. One object is a 240-g cube of copper that is initially at 80°C, and the other is a chunk of aluminum that is initially at 5.0°C. To the surprise of the student, the water reaches a final temperature of 25°C, precisely where it started. What is the mass of the aluminum chunk?
in grams
If a cube of a certain metal increases its volume from 15 cm3 to 17 cm3 as the temperature increases from 12°C to 28°C
The position of a particle is given in cm by x = (5) cos 5?t, where t is in seconds. Find the maximum acceleration of the particle
A cue ball traveling at 0.80 m/s hits a stationary 8-ball, which moves off with a speed of 0.27 m/s at an angle of 35° relative to the cue ball's initial direction. at what angle will the cue ball be deflected
It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.220 s, elucidate what is the average force exerted on the ball by the wall?
Air in a balloon does 50 J of work while absorbing 70 J of heat. What is its change in internal energy
A 0.45kg mass is attached to a spring with a force constant of 21N/m and released from rest a distance of 3.6cm from the equilibrium position of the spring, How far is the mass from the equilibrium position
To practice Problem-Solving Strategy 5.2 Dynamics problems. A 30.0kg- box is being pulled across a carpeted floor by a horizontal force of 230N, What is the acceleration of the box
Two long straight parallel wires are 12cm apart. Wire A carries 1.5A current. Wire B's current is 4.0A in the same direction, Determine the magnetic field due to wire B at the position of wire A
Suppose a spaceship runs out of fuel near a star. The crew erects a square, white sail 7.06 km on a side, Find the temperature of the star's surface
A test charge of +2*10^-7 C is located 5cm to the right of a charge +1*10^-6 C and 10 cm to the left of a charge -1*10^-6 C. The three charges lie on a straight line
A 60 kg bicyclist rides his 9.8 kg bicycle with a speed of 16 m/s. What is the magnitude of the braking force
what is the electric force between the proton and electron inside of a hydrogen atom? What must the speed of the electron be? Radius=0.47 x 10^-9.
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