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A 6.90-g lead bullet traveling at 420 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in temperature of the bullet?
An electron drops from the L shell to the K shell and gives off a K X-ray with a wavelength of 0.2510 nm. What is the atomic number of this atom
In figure (a), a 4.2 kg dog stands on a 15 kg flatboat at distance D = 6.1 m from the shore. It walks 2.1 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is then from the shore.
A block with mass mA = 11.0kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass mB = 6.0kg which hangs vertically
A 2.18-m-long diving board of mass 13.2kg is 3.00m above the water. It has two attahcments holding it in place. Assuming that the board has a uniform density, find the force acting on each attachment
An arrow is launched vertically upward from a crossbow at 97.9 m/s. Ignoring air friction, what is its instantaneous speed at the end of 10.0 s of flight? What is its average speed up to that moment? How high has it risen? What is its instantaneou..
A tungsten filament incandescent light bulb emits spherical electromagnetic waves of 50 Watts isotropically. What is the radiation pressure
The graphite in a pencil has a resistivity of 7.84×10^?6 W*m. The graphite's diameter is 0.700 mm and its length is 40.0 mm. Find the resistance of this graphite "wire."
The energy of a simple harmonic oscillator could be doubled by increasing the amplitude by a factor of approximately
A grandfather's clock is calibrated at a temperature of 20 C. The pendulum is a thin brass rod with a heavy mass attached to the end. On a hot day, when the temperature is 30 C, does the clock run fast or slow? How much time does it gain or lose i..
Jack and Jill are on two different floors of their high rise office building and looking out of their respective windows. What is the height between the two window ledges
A uniform stick 1.4 m long with a total mass of 300 g is pivoted at its center. With what angular speed is the stick spinning after the collision?
A galvanometer with a full-scale sensitivity of 800uA and a coil resistance of 54 ohms is to be used to build an ammeter designed to read 6.0A at full scale
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