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A roller coaster starts from rest at the top of an 18m hill. The car travels to the bottom of the hill and continues up the next hill that is 10.0m high. How fast is the car moving at the top of the 10.0m hill if friction is ignored?
A 1.5kg- block of ice is initially at a temperature of -7.0C a)If 2.6×10^5J of heat are added to the ice, Find the amount of ice, if any, that remains
On a workday an average decibel level of the busy street is 89 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 30 every minute on a weekend, what is the decibel level of street.
A nuclear power plant produces an average of 4.90 × 103 MW of power during a year of operation. Find the corresponding change in mass of reactor fuel
suppose the speci?c heats of milk and coffee are the same as that of water.
skier who, starting from rest, reaches a speed of 5.04 m/s when going down a slope for 4.21 s, How far does the skier travel in this time
A 115 V electric iron draws 5.57 A of current. How much heat is developed per hour, What is the temperature of the bath
A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.70 m/s at an angle of 21.0° below the horizontal. Find the height from which the ball was thrown
An automobile tire is inflated with air originally at 10.0°C and normal atmospheric pressure. During the process, What is the tire pressure in pascals
A liquid is flowing through a horizontal pipe whose radius is 0.0216 m. What volume flow rate will keep the pressures in the two horizontal pipes the same
A 0.5m^3 adiabatic tank contains steam at 1000 kPa and 350 C, Determine the final steam in the tank and the mass discharged
The magnetic field 7.5 cm directly above the center of a 25-turn coil of radius 15cm is 0.80mT. obtain the current in the coil
whose third coordinate is the vertical displacement between the planes. Consider east to be the positive x axis and north to be the positive y axis.
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