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1. A service station charges a battery using a current of 6.7 A for 5.0 h. How much charge passes through the battery?
2. A certain copper wire has a resistance of 10.0 . At what point along its length must the wire be cut so that the resistance of one piece is 4.0 times the resistance of the other? What is the resistance of each piece?
3. At $0.095 per kWh, what does it cost to leave a 25-W porch light on day and night for a year?
4. A 1.5-V dry cell can be tested by connecting it to a low-resistance ammeter. It should be able to supply at least 22 A. What is the internal resistance of the cell in this case, assuming it is much greater than that of the ammeter?
5. A close inspection of an electric circuit reveals that a 480- resistor was inadvertently soldered in the place where a 320- resistor is needed. How can this be fixed without removing anything from the existing circuit?.
Electric charge is uniformly distributed inside a nonconducting sphere of radius 0.30 m. The electric field at a point , which is 0.50 m from the center of the sphere, is 15,000 N/C and is directed radially outward. What is the maximum magnitude o..
i shoot a basketball at an angle of 65.0 degrees above the horizontal from a height of 2.00 m above the ?oor. the ball
A person 1.8 m tall stands 0.74 m from a reflecting globe in a garden. How large is the person's image
A man pulls a 50.0 kg box at constant speed across the floor. What is the value of the normal force
A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.90 m/s at an angle of 16.0° below the horizontal. Find the height from which the ball was thrown
A 2.20-uF capacitor is connected across an ac source whose voltage amplitude is kept constant at 60.0V but whose frequency can be varied, Find the current amplitude when the angular frequency is 100 rad/s
The isotope ^(99)Tc* is commonly used in several different types of medical imaging procedures. find the change in the nuclear mass after emission of the gamma ray
Assume sunlight just outside Earth's atmosphere has an intensity of 1.91 kW/m2. Compute (a)Em and (b)Bm for sunlight there, assuming it to be a plane wave.
A spacecraft is in orbit around a planet. The radius of the orbit is 3.0 times the radius of the planet (which is R = 71467 km). What is the period of the spacecraft's orbit
A coffee filter of mass 1.4 grams dropped from a height of 2 m reaches the ground with a velocity of 0.6 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter.
Two blocks are connected by a lightweight, flexible cord that passes over a single frictionless pulley. If m1 >> m2, find the acceleration of each block
If 0.45kg of water at 100 degrees Celsius is changed by a reversible process to steam at 100 degrees Celsius, decide the change in entropy of (a) the water, (b) the surroundings, and (c) the universe as a whole. (d) How would you answers differ if th..
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