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A student is about to do a push-up. Her center of gravity lies directly above P on the floor, which is 0.9 m from her feet and 0.5 m from her hands. If her mass is 53 kg, what is the force exerted by the floor on her hands? The acceleration of gravity is 9.81 m/s^2. Answer in units of N.
Near the surface of the Earth a block of mass M is sliding down an incline with angle µ1 = 30degrees. what maximum height H will the block reach
A 64-kg runner rounds a circular track of radius 63.7 m at a constant 5.30 m/s. Find the magnitude of her momentum changes after she has gone one-fourth of the circle
When additional mass is added to the piston, the height of the piston decreases to 16.4 cm. Find out the new pressure applied by the piston.
A pulley 18 in diameter is free to rotate about the horizontal axle. A 220 mass and a 420 mass are tied to either end of a massless string, and string is hung over the pulley.
An iron heating coil for a burner on an electric range runs off a 240V circuit and produces 100 Watts of heat. Given a length of 1.2 m for the coil, find the diameter of the coil
You want to precut a set of 1.51 ohm strips of 14.0 gauge copper wire (of diameter 1.628 mm ). How long should each strip be
An 800 kHz radio signal is detected at a point 9.5 km distant from the transmitter tower. Find the average electromagnetic energy density
An AC voltage source has an output of ?V = 163.0 sin(582t) Volts. Calculate the RMS voltage. What is the frequency of the source?
A normal electric power cord consists of two parallel conductors about 4 mm apart. Estimate the magnetic field strength (in N/C) about 30 cm from a linear 25 m power cord connected to a 100 W lamp
The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg. The density of water is 1.00 g/cm3.
What is the phase difference in a Young's double slit experiment where the intensity is half that of the central maximum
I have a rectangular slab of aluminum that is in contact with a rectangular slab of copper and both slabs are 5.00 cm x 15.0 cm in area. how much energy would flow from one face to the other
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