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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?
The electric potential at a position located a distance of 19.8 mm from a positive point charge of 7.80×10-9C, Calculate the value of the second charge
A pipe open only at one end has a fundamental frequency of 214 Hz. A second pipe, initially identical to first pipe, is shortened by cutting off the portion of the open end. Now, as both pipes vibrate at their fundamental frequencies, the beat freque..
A 71-kg skier is going down a slope oriented 32° above the horizontal. Determine the pressure that each skier exerts on the snow
A concave mirror is of hemisphjerical shape with radius 40cm. A thin layer of unknown transparent liquid is poured into mirror. The mirror liquid forms a real image and another real image is formed by the mirror alone.
q1. a ferris wheel is a vertical circular amusement ride with radius 6 m. riders sit on seats that swivel to remain
An electron and a proton are separated by 2.4 nm, What is the magnitude of the force on the electron
q1. a parachutist descending at a speed of -13.0 ms loses a shoe at the altitude of 54.0 m.a when does the shoe reach
It rolls at a steady speed for 1.9 s, then one wheel begins to stick. The train comes to a stop 6.0 m from its starting point. Illustrate what is the train's acceleration after its wheel begins to stick?
An electron in the n = 6 state of a hydrogen atom makes a transition to the n = 3, What is the wavelength of the photon emitted
A vertical electric field of magnitude 2.00 × 104 N/C exists above the Earth's surface on a day when a thunderstorm is brewing. A car with a rectangular size of 6.00 m by 3.00 m is traveling along a roadway sloping downward at 10.0°. find the elec..
An unstrained horizontal spring has a length of 0.34 m and a spring constant of 290 N/m. Two small charged objects are attached to this spring, one at each end. The charges on the objects have equal magnitudes.
Two blocks are connected by a lightweight, flexible cord that passes over a frictionless pulley. If m1 is 3.7 kg and m2 is 9.0 kg, and block 2 is initially at rest 140 cm above the floor, how long does it take block 2 to reach the floor.
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