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A snow maker at a resort pumps 150 kg of lake water per minute and sprays it into the air above a ski run. The water droplets freeze in the air and fall to the ground, forming a layer of snow. If all of the water pumped into the air turns to snow and the snow cools to the ambient air temperature of -5.0°C, how much heat does the snow-making process release each minute? Suppose the temperature of the lake water is 16.8°C, and utilize 2.00x103J/(kg·C°) for the specific heat capacity of snow.
On the TV show Top Gear's Africa special this season, the three hosts decided to build a raft out of wood, How think did the raft need to be
A large parallel plate capacitor has plate separation of 0.90 cm and plate area of 361 cm2. How much work is done on the capacitor as the plate separation is increased to 1.80 cm
While on a vacation to Kenya, you visit the port city of Mombassa on the Indian Ocean. Calculate the muzzle velocity necessary to hit a pirate ship 300 meters from the base of the fort
A strip of doped silicon 325 µm wide contains 9.6 1022 conduction electrons per cubic meter and an insignificant number of holes, What is the thickness of the strip
A tightrope walker who weighs 640 N walks along a steel cable. When he is halfway across, the cable makes an angle of 0.040 rad below the horizontal. What is the cross-sectional area of the cable
The pendulum in a grandfather clock is made of brass and keeps perfect time at 20?C. How much time is lost in a year
A proton moves at constant velocity in the +y direction, by a region in which there is an electric field and a magnetic field. The electric field is in the +x direction, and has magnitude 700 V/m. The magnetic field is in -z direction, and has ma..
The mean distance of Mars from the Sun is 1.52 times that of Earth from the Sun. Determine the mass of Earth from the period T
To listen to a radio station, a certain home receiver must pick up a signal of at least 1.0X10^-10 W.If the radio waves have a frequency of 93MHz, how many photons must the receiver absorb per second to get the station?
A soccer ball, which has a circumference of 70.0 , rolls 11.0 in 3.30. What was the average angular speed of the ball during this time
The drawings show three charges that have the same magnitude butdifferent signs. In all cases the distance d between the charges isthe same. The magnitude of the charges is , and the distance between themis d = 3.8 mm. Determine the magnitude of t..
A light beam traveling in the negative z direction has a magnetic field B=(3.02x10-9T)x + (-5.28x10-9T)y at a given instant of time. The electric field in the beam has a magnitude of 1.82 N/C at the same time. Write the E (electric field) in terms of..
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