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A battery with an emf of 12.0 V shows a terminal voltage of 11.3V when operating in a circuit with two lightbulbs rated at 3.0 W (at 12.0 V) which are connected in parallel.
Part A What is the battery's internal resistance?
A recording engineer works in a soundproofed room that is 39.4 dB quieter than the outside. what is the intensity outside
A pitcher throws a curveball that reaches the catcher in 0.55s. The ball curves because it is spinning at an average angular velocity of 280rev/min (assumed constant) on its way to catcher's mitt.
a record is turning at the rate of 33 r.p.m. when the 45 r.p.m. button is pressed. what is the angular acclereration of the record
A tractor pulls a sled of mass M = 1375 kg across level ground. The coefficient of kinetic friction between the sled and the ground is ?k = 0.605, What magnitude of tension in the rope is necessary to move the sled horizontally
A 18cm tall image is located at 4 cm behind a concave mirror with a focal length 5 cm. Find the location of object, its height, and the magnification
Two astronauts, each having a mass M are connected by a length of rope of length d have a negligible mass. They are isolated in space, What is the final angular speed of the astronauts
Coherent light with wavelength 599nm passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00m from the slits. The first-order bright fringe is a distance of 4.84mm from the center of central brigh..
what magnitude of horizontal force must the person apply to keep it moving with constant velocity? c) If the person continued to push with the force used to start the motion, what would be the acceleration of the trunk.
A force of 100 N is applied to a 50 kg mass in the direction of motion for a distance of 6.0 m, how much work is done by the varying force
two blocks are connected by a string over a disk-shaped pulley with mass M8.5 kg and outermost readuis R = 0.10m. Calculate the acceleration of the hanging block
What is the force of gravity on the satellite if it moves towards Earth so its distance is now one half the original distance and
A person who weighs 656 N is riding a 91-N mountain bike. compute the area of contact between each tire and the ground
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