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In a certain stereo system, each speaker has a resistance of 4.00 '. The system is rated at 60.0 W in each channel, and each speaker circuit includes a fuse rated 4.00 A. Is this system adequately protected against overload? Explain your reasoning.
A hang glider and its pilot have a total mass equal to 113 kg. While executing a 360° turn, the glider moves in a circle with a 9 m radius. What is the net force on the hang glider
Two point charges are located on the axis as follows: charge = -1.80 at = -0.500 , and charge = 2.20 at the origin (= 0). What is the direction of the net force
A capacitor with air between its plates is charged to 70 V and then disconnected from the battery. When a piece of glass is placed between the plates, the voltage across the capacitor drops to 50 V. What is the dielectric constant of this glass?
A typical human body has surface area 1.4 m2 and skin temperature 33 C. If the body's emissivity is about 0.95, what's the net radiation from the body when the ambient temperature is 15C?
A -7-nC point charge is located at the center of a conducting spherical shell. The shell has an inner radius of 2 m, an outer radius of 4 m, and a charge of +7 nC. (Let the radially outward direction be positive.) What is the electric field at r = ..
For some applications, it is important that the value of a resistance not change with temperature. What value should the carbon resistor have
a 2.70 microf capacitor is charged by a 20.0 v battery. it is disconnected from the battery and then connected to an
A microscope slide is placed in front of a converging lens with a focal length of 2.18 cm. The lens forms an image of the slide 10.3 cm from the slide. How far is the lens from the slide if the image is real
Assume you doubled the mass of a clock‘s pendulum (including the rod and the weight at the end) while keeping its dimensions the same. Would the clock run fast or slow?
A bullet with mass m and speed v is fired at a ballistic pendulum bob of mass M. The bob is attached to a thin, light rod of length L, hangs vertically initially, and is attached to a pivot at its top end.
To determine the muzzle velocity of a bullet fired from a rifle, you shoot the 3.57-g bullet into a 2.47-kg wooden block. The block is suspended by wires from the ceiling and is initially at rest. After the bullet is embedded in the block, the block ..
Water flowing through a garden hose of diameter2.70cm fills a20.0-L bucket in1.30min. What is the speed of the water leaving the end of the hose
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