Final temperatures of the water and the aluminum
A piece of aluminum (specific heat 0.910 kJ/kg 0C) of mass 116 g at 75 0 C is dropped into a Styrofoam cup filled with 118 ml water at 20 0 C. What are the final temperatures of the water and the aluminum?
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The reflected sound is then mixed with the transmitted sound, and 90 beats per second are detected. The speed of sound in body tissue is 1480.
A 114 watt motor is used to lift a 142 kg container to a height of 5 m. How much time does it take to lift the container with the motor?
What is the length of a pendulum whose period on the moon matches the period of a 4.50-m-long pendulum on earth?
A closed cylindrical tank has a height of 0.77 m. The tank is initially filled with air at a pressure of 2.0 atm. Water is pumped into the tank until the air pressure reaches 6.1 atm. The temperature is constant. Determine the height of the compre
The maximum potential difference across the capacitor during the oscillations is 2.25 V and the maximum current through the inductor is 44.4 mA. What is the inductance L?
A 175 kg horizontal beam is supported at each end. A 295 kg piano rests a quarter of the way from one end. What is the vertical force on the support closest to the piano?
Sam, whose mass is 72.0 kg, takes off down a 55.0 m high, 12.0^circ slope on his jet-powered skis. The skis have a thrust of 220 N. Sam's speed at the bottom is 38.0 {rm m/s}. What is the coefficient of friction of the snow?
A proton is moving directly east with a velocity of 2.00*10^5m/s and enters a magnetic field of 8.00*10^-3T directed vertically downwards.
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