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A child and sled with a combined mass of 49.0 kg slide down a frictionless slope. If the sled starts from rest and has a speed of 2.30 m/s at the bottom, what is the height of the hill?
m
A car of mass = 1400 travelling at 60.0 enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between the road and the car's tires. Use = 9.80 throughout this problem.
Calculate the angular velocity of the wheel when the suitcase reaches the ground. compute the moment of inertia of the wheel.
An ideal gas expands at a constant pressure of 2.9 atm from 435 mL to 709 mL. Heat then flows out of the gas, determine the total heat flow into the gas
A disc of mass M and radius R is rolling purely without slipping with velocity V on a flat horizontal floor. When it hits a step in the floor of height R/2.what is the velocity of the center of mass of the disc just after impact.
Two 1.50-V batteries-with their positive terminals in the same direction-are inserted in series into the barrel of a flashlight. What is the bulb's resistance
Find the self-inductance of a solenoid 44cm long and 6.0cm in diameter that contains 2000 turns of wire
The Space Shuttle travels at a speed of about 7.60 103 m/s. The blink of an astronaut's eye lasts about 120 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye?
A uniform electric field of 2000 N/C is in a direction 600 from the x-axis. A charge of -1.20 mC starts from the origin O, calculate the potential at B and at the origin
Cooling water from a river flows through the condenser (the low-temperature heat exchanger) at the rate of 1.2×108L/h (?30 million gallons per hour). If the river water enters the condenser at 18?C, what is its exit temperature
A 20kg box slides up a 12m long incline at an angle of 30 degrees with the horizontal. What is the change in gravitational potential energy
When a nerve cell depolarizes, charge is transferred across the cell membrane, changing the potential difference. For a typical nerve cell, 9.0 pC of charge flows in a time of 0.50ms . 1. What is the average current? Express your answer to two sig..
A baseball (m = 145 g) approaches a bat horizontally at a speed of 40.5 m/s (91 mi/h) and is hit straight back at a speed of 45.9 m/s, what is the average force exerted on the ball by the bat
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