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A student drops two metallic objects into a 32 g steel container holding 169 g of water at 29C. One object is a 486 g cube of copper that is initially at 58C, and the other is a chunk of aluminum that is initially at 6.9C. To the student's surprise, the water reaches a final temperature of 29C, precisely where it started.
What was the mass of the aluminum chunk?
How much is the spring compressed?
What is the total translational kinetic energy in a test chamber filled with nitrogen (N2) at 2.03×105 Pa and 20.7°C? The dimensions of the chamber are 3.00 m × 6.00 m × 8.30 m
A uniform electric field of magnitude 271 V/m is directed in the negative x direction. A +12.7 ?C charge moves from the origin to the point (x, y) = (15.5cm, 46.0 cm). What was the change in the potential energy of this charge?
A poor artist might approximate a flower as a series of radial lines and circular arcs. What is the direction of the magnetic field
In Rutherford's famous scattering experiment, α particles (helium nuclei) were fired at 2.0 x 10^7 m/s over a large distance toward a gold nucleus with charge +79e
Cliff and Will support the board at each end so that it is horizontal. A 61 kg boulder is placed on a 2.00 m long board at a point that is x from Cliff. What is the displacement x of the boulder from Cliff
In a ballistics test, a 25 g bullet traveling horizontally at 1200 m/s goes through a 35-cm-thick 350 kg stationary target and emerges with a speed of 1000 m/s. What is the target's speed just after the bullet emerges
A 750g aluminum pan is removed from the stove and plunged into a sink filled with 10.0kg of water at 20.0C. What was the initial temperature of the pan
A ramp is 25 meters long and is inclined at 30 degrees with the horizontal. A block of mass 25 is pulled up at a constant acceleration of 1 m/s2. The coefficient of kinetic friction is 0.15. If the box starts at rest from the bottom, what would be..
The black hole at the center of the Milky way galaxy is estimated to contain about 4 million solar masses. (msun= 2 x 1030 kg), What is the Schwarzchild radius of our galaxy's black hole
Suppose an asteroid is found that appears to be heading directly toward Earth (using Earth's location at the time of discovery). It is 4.2 A.U. away (i.e., 4.2 times the Earth-Sun distance), and travelling through the Solar System with a speed of ..
An object of mass 0.77 kg is initially at rest. When a force acts on it for 2.9 ms it acquires a speed of 16.2 m/s. Find the magnitude of the average force acting on the ball
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