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A small car with a mass of 850kg travels northward at 25m/s.
a) Does the car have more or less momentum than a truck with a mass of 10500kg traveling eastward at 17 m/s? -------more or less
b) How much more or less? -------times
suppose a 30 gram piece of iron is dropped into a container of water and gives off 165 calories in cooling. calculate
A transformer has 350 primary turns and 1390 secondary turns. The input voltage is 120?V and the output current is 18.0A, find the output voltage and input current
The National Aeronautics and Space Administration (NASA) studies the physiological effects of large accelerations on astronauts. Some of these studies use a machine known as a centrifuge.
Two carts with masses of 5.00 kg and 2.64 kg move toward each other on a frictionless track with speeds of 4.86 m/s and 3.46 m/s correspondingly. The carts stick together after colliding head-on. Find the final speed.
A monster truck has tires with a diameter of 1.10 m and is traveling at 32.4 m/s. After the brakes are applied, the truck slows uniformly and is brought to rest after the tires rotate through 42.8 turns.
Find out the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.
A 1.2kg block is dropped from 48 cm above a spring in equilibrium. Calculate the maximum compression in the spring
A light bulb is connected to a 120.0-V wall socket. The current in the bulb depends on the time t according to the relation I = (0.884 A) sin [(333 Hz)t]. What is the average power delivered to the light bulb
A boy whirls a stone in a horizontal circle of radius 1.9 m and at height 1.8 m above level ground. obtain the magnitude of the centripetal acceleration of the stone
question a ball is thrown at a 60.0deg angle above the horizontal across level ground. it is released from a height of
A converging lens has a focal length on both sides of 24.0 cm. An object is placed to the left of the lens at 14.0 cm. The object is 8.0 cm in height. Is the image to the left or right of the lens
A skier of mass 61 kg ispulled up a slope by a motor-driven cable. What power must a motor have to perform this task
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