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What is the internal resistance of a 12.0-V car battery whose terminal voltage drops to 9.5V when the starter motor draws 77A ?
What is the resistance of the starter?
There is a beam that weighs 1500 kilograms and is twenty meters in length. It has a 15000 kilogram mass on the right side, five meters from the center of gravity. obtain the net tension of each brace that is holding up the beam on both sides.
An air puck of mass m1 = 0.30 kg is tied to a string and allowed to revolve in a circle of radius R = 1.0 m on a frictionless horizontal table. The other end of the string passes by a hole in the center of the table, and a mass m2 = 1.20 kg is att..
A group of hikers hear an echo 2.50 s after they shout. If the temperature is 28°C, how far away is the mountain that reflected the sound wave.
If the coefficient of friction between the book and the wall is .35, explain how hard would she have to push in order to allow the book to slide down at constant speed?
A flight attendant pulls her 63N flight bag a distance of 312m along a level airport floor at a constant velocity. The force she exerts is 39N at the angle of 59° above the horizontal.
Calculate the number of coulombs of positive charge in 270 cm3 of (neutral) water. (Hint: A hydrogen atom contains one proton and an oxygen atom contains eight protons.) I keep getting 1.4E7 and its showing up wrong.
Then, 25 s later, the cyclist is 45 m due north of the flagpole, going due east with a speed of 12 m/s. For the cyclist in this 25 s interval, find out each of the following. (a) displacement (b) average velocity (c) average acceleration
A wire of length L = 15 is bent into a semi circle . If the total charge on the wire is -45nC, determine the electric field at the center point of the semicirlce.
Determine the magnitude and direction of the force between two parallel wires 15m long and 6.0cm, Determine the magnitude of the force between two parallel wires
The coefficient of kinetic friction for wood sliding on wood is 0.20. What is the final speed of the bullet
A magnetic field of magnitude 0.38 T is directed vertically upward, Find the magnetic flux through a flat surface of area 22 cm2 if the surface is horizontal
A water-skier, moving at a speed of 9.15 m/s, is being pulled by a tow rope that makes an angle of 37.0° regarding the velocity of the boat (see the Illustrating). The tow rope is parallel to the water. The skier is moving in the similar direction..
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