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Batteries are rated in terms of ampere-hours (A · h). For example, a battery that can produce a current of 2.00 A for 3.00 h is rated at 6.00 A · h.
(a) What is the total energy, in kilowatt-hours, stored in a 12.0-V battery rated at 55.0 A · h?
(b) At $0.060 0 per kilowatt-hour, what is the value of the electricity produced by this battery?
You want to nail a 1.3-kg board onto the wall of a barn. What happens to the force of static friction if you push against the wall with a force greater than that found in part A
A place kicker must kick a football from a point 28.0 m (= 30.6 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. What is the vertical velocity of the ball at the time it reaches the crossbar
An object is placed L = 7.20 cm to the left of a converging lens of focal length 3.00 cm. What is the magnification due to the mirror
A 1.05-kg bucket is tied to a rope of negligible mass that is wrapped around a pole mounted horizontally on frictionless bearings. When the bucket is released from rest
A 2.5 cm diameter metal sphere is glowing red, but a spectrum shows that its emission spectrum peaks at an infrared wavelength of 2.0 micrometers How much power does the sphere radiate
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Two harmonic waves travelling in opposite directions interfere to produce a standing wave described by y'(x,t)=4sin5xcos6t where x is in (m) and t is in (s). What is the approximate frequency of the interfering waves?
Infrared light of wavelength 2.5micrometers illuminates a 0.20-mm-diameter hole. What is the angle of the first dark fringe in radians
What is an average acceleration of the dragonfly
Suppose Galileo's pulse rate was 68 beats per minute. What is the time between consecutive pulse beats
A nuclear-fueled electric power plant utilizes a so-called "boilingwater reactor". In this type of reactor, nuclear energy causes water under pressure to boil at 285 °C, by which the temperature of the river rises
Suppose you want to connect your stereo to remote speakers; it requires 20 m length of wire per speaker, how does the resistance changes
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