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A 55.0-kg ice skater is moving at 4.07 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.793 m around the pole.
(a) Determine the force exerted by the horizontal rope on her arms.
____N
(b) Compare this force with her weight by finding the ratio of the force to her weight.
_____
Project Seafarer was an ambitious program to construct an enormous antenna, buried underground on a site about 10000 km2 in area. What would be the frequency of the radiations emitted
A planet of mass 6.00 1025 kg is in a circular orbit of radius 2.00 1011 m around a star. The star exerts a force on the planet of constant magnitude 5.03 1023 N. The speed of the planet is 4.09 104 m/s. All through this half "year", how much work is..
The nucleus of an atom has a radius of about 6.8×10-15 m. The electron is normally at a distance of about 1.3×10-11 m from the nucleus. find the volume of the atom
A projectile is fired from ground at an angle 60 degrees above horizontal to hit a target on the wall, which is 25.0 m away. Find the initial speed of the projectile
federal statute requires that a car's bumper be designed to withstand a 2.50 mph (1.12m/s) collision with an immovable object without damage to the body of the car. Calculate the average force on a bumper
A viewing window in the Atlanta aquarium is 58 inches wide and 52 inches high. what is the outward force on the window
A 15-kg block rests on a level frictionless surface and is attached by a light string to a 5.0-kg hanging mass where the string passes over a massless frictionless pulley
A heat pump uses an ideal Carnot cycle to heat a house. The outside air has a temperature of 294 K, In the scenario described in the previous question, how much energy is transferred out of the outside air
calculate the final temperature of the puddle once it settled to equilibrium. (Assume the chamber walls are sufficiently flexible to allow the system to remain isobaric and consider thermal losses/gains from the chamber walls as negligible.)
An L-C circuit containing an 83.0-mH inductor and a 1.70-nF capacitor oscillates with a maximum current of 0.730A.calculate the energy stored in the inductor after 2.50ms of oscillation
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. How much time is required for the projectile to come up to speed
A 2 meter wire carrying 1 A of current is at a 90 degree angle to a magnetic field. If the current feels a force of 1 N from the magnetic field, what is the strength of the field
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