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The sound intensity level at a rock concert is 114 dB, while that at a jazz fest is 84.5 dB. Find the ratio of the sound intensity at the rock concert to that at the jazz fest.
A meterstick lies along the optical axis of a convex mirror of focal length -48 cm, with its nearest end 63 cm from the mirror. How long is the image of the meterstick
A 250 g piece of ice at 0°C is placed in 430 g of water at 22°C. What is the final equilibrium temperature of the system
A cue ball travelling at 5.0 m/smakes a glancing, elastic collision with a target ball of equalmass that is initially at rest. Find the speed of each ball after the collision
a student sits on a rotating stool holding two 2.0 kg masses. when his arms are extended horizontally the masses are 1
a standing wave oscillating on a string at frequency f_0. How many antinodes will there be if the frequency is increased to 3f_0
Ice at -14.9 °C and steam at 115 °C are brought together at atmospheric pressure in a perfectly insulated container. After thermal equilibrium is reached, the liquid phase at 52.0 °C is present.
a parallel plate capacitor has an air dielectric. the capacitor is charged with surface charge density s0 and then the
To make ice, a freezer that is a reverse Carnot engine extracts 50 kJ as heat at -15°C during each cycle, How much work per cycle is required to run the freezer
A rotating rod that is 15.3 cm long is spun with its axisthrough one end of the rod so that the other end of the rod has aspeed of 2010m/s(4500mph). What is the centripetal acceleration of the end of the rod?
On a 7.2 m length of string, you count 5 crests and 4 troughs. What is the wavelength of the waves on the string
A charge of -2.2×10-9 C is at the origin and a charge of 6×10-9 C is on the x-axis at x = 3m. At what two locations on x-axis (xpositive, xnegative) is the potential zero.
Calculate the change in internal energy when 1 mole of liquid water at 1atm and 100 degrees C is evaporated to water vapor at the same pressure and temperature, given that the molar volumes of the liquid and the vapor at these conditions are 18.8 cm^..
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