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A 41 kg ice skater is moving at 4.73 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then movesi n a circle of radius 0.514 m around the pole.
Find the force exerted by the rope on her arms. The acceleration of gravity is 9.8 m/s2.
Find the ratio of this tension to her weight.
Calculate the number of coulombs of positive charge in 285 cm3 of (neutral) water. (Hint: A hydrogen atom contains one proton; an oxygen atom contains eight protons.)
a 200 ohms resistor and a .4 H inductor are connected in series with a voltage source having amplitude of 30 v, what is the current amplitude
A 6.0-kg block is at rest on a horizontal floor. If you push horizontally on the 6.0-kg block with a force of 24.0 N, it just starts to move. What is the coefficient of static friction
An obstacle has a velocity of 290 km/h and drops with an angle of 30 degrees. It hit's the ground at d=700m. How long was the obstacle in the air
A particle moves in simple harmonic motion with a frequency of 2.60 Hz and an amplitude of 6.00 cm. Through what total distance does the particle move during one cycle of its motion
Lithium, beryllium, and mercury have work functions of 2.30eV,3.90eV, and 4.50eV respectively. Find the maximum kinetic enery for the photoelectrons in each case
A current of 1.5 A is flowing through a resistance of 18Ω. What is the voltage difference across their resistance
An aquarium contains a 5-cm layer of water n=1.333 floating on top of carbon tetrachloride. what is the angle of refraction into the air
An astronaut in space cannot use conventional means, such as a scale or balance to determine the mass of an object. What is the mass of this canister
a bathyshpere dives to a depth of 1000 m in the ocean. if the inside is maintained at one atmosphere, what is the net force acting on the round window
Two slits spaced 0.500mm apart are placed 77.0cm from a screen. What is the distance between the second and third dark lines
asssume that in a particular vacuum tube the potential of the anode is 340 V higher than that of the cathode. If an electron leaves the surface of the cathode with zero initial speed, what is its speed when it strikes the anode.
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