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A heater runs on an AC voltage of 120 V and draws a power of 44 W. If this heater were run instead on a DC voltage of 90 V, how much current would flow through the heater? Hint: The heater can be modeled as a resistor.
=_________A
A 5.78 cm long rod in the shape of a rectangular solid has cross section dimensions 28.7 mm x 42.6 mm. What is the current in the block
A 110 g copper bowl contains 130 g of water, both at 24.0°C. A very hot 370 g copper cylinder is dropped into the water, causing the water to boil, How much energy (in calories) is transferred to the water as heat
Calculate the pressure exerted on the ground by a 57 kg person standing on one foot. Assume that the bottom of the person'sfoot is 13 cm wide and 28 cm long
On the small and good planet Ballonius in a distant solar system, suppose we find the radius of the good planet to be 210,000 m. Estimate the mass of Ballonius
At t = 0, a wheel rotating about a fixed axis at a constant angular acceleration of -0.40 rad/s^2 has an angular velocity of 1.5 rad/s, What is the angular position of the wheel at t = 2.0 s
What is the average force felt by a 0.06 kg tennis ball if it strikes the racket at a speed of 30m/s and leaves the racket with a speed of 50m/s in the opposite direction
A 500g model rocket is on a cart that is rolling to the right at a speed of 3.0m/s. The rocket engine, At what horizontal distance left of the hoop should you launch
A 3.00 mass on a spring has displacement as a function of time given by the equation. Find the maximum magnitude of force on the mass
Two negative point charges are separated by 11.0cm and feel a mutual repulsive force of 1.85?N . The charge of one is three times that of the other. How much charge does each have? in nanocoulumbs
A large storage tank, open at the top and filled with water, develops a small hole in its side at a point 15.8 m below the water level. If the rate of flow from the leak is equal to 2.00 10-3 m3/min, determine the speed at which the water leaves th..
An electric iron connected to a 110V source draws 9A of current.show that the amount of heat generated in one minute is almost 60 kj.
A 14,240N car is traveling along a highway at 95.0 kn/hr. If the driver immediately applies his breaks, what average force acted upon the car
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