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You make a capacitor by cutting the 12.5 cm diameter bottoms out of two aluminum pie plates, separating them by 3.50 mm , and connecting them across a 6.00-V battery. What is the capacitance of your capacitor? If you disconnect the battery and separate the plates to a distance of 3.50 cm without discharging them, what will be the potential difference between them?
Suppose the skin temperature of a naked person is 34.3 °C when the person is standing inside a room whose temperature is 21.3 °C. Assuming the emissivity is 0.673, find the net loss of radiant power from the body
An ideal gas is heated at a constant pressure of 2.00 105 Pa from a temperature of -73.0° C to a temperature of +25° C. What is the increase in internal energy of the gas
A floodlight with a mass of 20.0 kg is used to clarify the parking lot. The floodlight is supported at the end of a horizontal beam that is hinged to a vertical pole.
An object with a charge of -2.6?C and a mass of 1.2×10?2kg experiences an upward electric force, Find the magnitude of the electric field
A 768 kg car moving at 27 m/s brakes to a stop. The brakes contain about 16 kg of iron that absorb the energy. What is increase in temperature of the brakes
What is the kinetic energy of a 1,500 kg car with velocity of 72.0 km/hr? How much work must be done on the car to bring it to a complete stop.
A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates, Determine the work done by the net external force acting on the skier
Two astronauts, each having a mass of 79.0 kg, are connected by a 10.5 m rope of negligible mass. Calculate the rotational energy of the system
A small pole (uniform, thin) that has mass 4.05 kg and can pivot about an axis perpendicular to the length of the pole and through its center. What must the length of the rod be
The maximum characteristic x-ray photon energy comes from the capture of a free electron into a K shell vacancy. What is this photon energy in keV
A force in the negative direction of an x axis is applied for 34 ms to a 0.40 kg ball initially moving at 14 m/s in the positive direction of the axis. What is the direction of the impulse on the ball
When an ambulance is stationary, the siren gives off a sound at a frequency of 500 Hz. What is the frequency of the stationary siren as perceived by an observer
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