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A boy is playing rollerblade dodgeball. His rollerblades are frictionless and he is initially at rest. A dodgeball with mass 594.9 g is thrown directly at him with a speed of 22.43 m/s. He catches the dodgeball and then moves with a speed of 0.2635 m/s. What is the mass of the boy?
A typical lightbulb in your house is rated 200 W, which means that the bulb dissipates 200 W when connected to a DC voltage of 110 V. What is the current through the lightbulb
A 740g, 40cm long rod is free to rotate about a frictionless axle at one end. What is the rod's angular velocity immediately after the blow
A metal block measures 5.65 cm x 2.97 cm x .92 cm and has a mass of 127.7 g. When lowered into water with a vertical orentation (standing on end) Determine the difference in water pressure between the bottom and top of the block
A 1890 kg truck traveling north at 45 km/h turns east and accelerates to 51 km/h. What is the change in the truck's kinetic energy
One of the harmonics of a column of air open at one end and closed at the other has a frequency of 448 Hz, What is the fundamental frequency of the air column
The third floor of a house is 7.00 m above street level. How much work is necessary to move a 143kg refrigerator to the third floor.
A (smooth) rope of length L and mass m is placed above a hole in a table. One end of the rope falls through the hole, Find the mechanical energy lost from the rope as the end of the rope leaves the table
What law of physics would be violated
A 1.8-m-long glass tube that is closed at one end is weighted and lowered to the bottom of a freshwater lake. Determine the depth of the lake
While pacing in the hallway at a constant velocity, you drop a tennis ball so that it falls towards the floor. calculate the height above the floor from which the tennis ball is released
Ikjoo Yoo of the Tampa Bay Lightning has had his slap shot clocked at 102.1 mph (45.64 m/s). How much momentum is lost in the collision
Physics: Speed of car at bottom of driveway; initial speed of bullet, 20 A 2.10 x 10³ kg car starts from rest at the top of a 5.0 m long driveway that is sloped at 20° with the horizontal. If an average friction force of 4.0 x 10³ N impedes the mo..
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