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Soles of boots that are designed to protect workers from electric shock are rated to pass a maximum rms current of 1.3 mA when connected across an 1.7×10^4V AC source.What is the minimum allowed resistance of the sole?
A 650-N Marine in basic training climbs a 11.5-m vertical rope at a constant speed in 9.50 s. What is his power output
A converging lens of focal length 77.0 cm. is placed 52.0 cm. behind a diverging lens. What is the absolute value of the focal length (in centimeters) of the diverging lens
Suppose you wish to make a solenoid whose self-inductance is 1.7 mH. How many turns of wire are needed
A mass pulled by a constant force accelerates from 10 cm/s to 25 cm/s in 3.5 s. what is the magnitude of the second force
Two blocks (A and B) are in contact on a horizontal frictionless surface. A 40N constant horizontal force is applied to A. The mass of A is 5.0kg and the mass of B is 20kg
An object is placed 19 cm to the left of a converging lens of focal length 29 cm. Find the position and magnification of the final image
For a car moving at speed v, the force of air drag on the car is proportional to v^2 . Suppose the power output of the car is doubled, by what factor is the speed of the car increased
A 50 kg block and a 100kg block are connected by string. the pulley is frictionless and of negligible mass. the coefficient of kinetic friction between the 50kg block and incline is 0.250. find the change in the kinetic energy of the 50kg block as..
A constant, uniform magnetic field directed into this sheet exists in the region to the right of the y axis. Calculate the radius of the particles path
In a common but dangerous prank, a chair is pulled away as a person is moving downward to sit on it, What are the magnitudes of the average force acting on the victim from the floor during the collision
The pressure in an automobile tire is usually quoted (in the United States) in pounds per square inch (lb/in2), What is the value of the gauge pressure in Pascals
At a certain location, the horizontal component of the earth's magnetic field is 2.2 10-5 T, due north. Find the speed of the proton
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