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A homemade electroscope has 2 pieces of straw hanging from 2strings dangling from a hook. The length of the string fromtop to bottom on one side is 8 cm. When charged, the strawsstay 2 cm apart. The mass of one of the straws is .08 grams.Assuming the straws have an equal charge, how much is the charge onone of the straws?
A 0.26- rock is thrown vertically upward from the top of a cliff that is 32m high. When it hits the ground at the base of the cliff, find the initial speed of the rock
An electric field applies a force of 9.11x10^-16 N to an electron emitted from a cathode of a cathode ray tube at essentially zero velocity
A 16.0 kg rock is initially at rest upon a level table. A person suddenly pushes against the rock in the horizontal direction with a force of 8.0 N. FIND the velocity of the rock after 1.5 s
A particle oscillates with S.H.M. The maximum displacement from its mean position is 0.5 meter and frequency of motion is 10 Hz. at time t=0, particle is located at 0.15 meter and has the velocity of 24.0 m/s towards the negative x-axis.
Suppose 199 W of heat flows by conduction from the blood capillaries beneath the skin to the body's surface area of 1.37 m2. estimate the average distance of capillaries below the skin surface
A system consisting entirely of electrons and protons has a net charge of 1.83 10-15 C and a net mass of 4.61 10-23 kg. How many electrons are in this system
while unloading furniture, a worker slides a heavy box down the ramp on the rope. find the mass of the box
A tube with a 3.0-mm radius has ions flowing through it along its length. To determine the rate at which the charge is being moved through the tube, what is the magnitude of the current flowing through the tube
The black hole at the center of the Milky way galaxy is estimated to contain about 4 million solar masses. (msun= 2 x 1030 kg), What is the Schwarzchild radius of our galaxy's black hole
a devive consists of four balls. just after the impact, what is the angular speed of the device
A cart for hauling ore out of a gold mine has a mass of 437 kg, including its load. Find the work that the donkey performs on the cart during this process
A 1.9 mol sample of hydrogen gas is heated at constant pressure from 302 K to 410 K. Calculate the energy transferred to the gas by heat.
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