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A 56-kg student runs at 4.2m/s , grabs a hanging 10.0-m-long rope, and swings out over a lake. He releases the rope when his velocity is zero.
Part A What is the angle when he releases the rope?
Part B What is the tension in the rope just before he releases it?
Part C What is the maximum tension in the rope during the swing?
Two ultrasonic sound waves combine and form a beat frequency that is in the range of human hearing for a healthy young person, What is the largest possible value for the frequency of the other ultrasonic wave
A 720-kg race car can drive around an unbanked turn at a maximum speed of 43 m/s without slipping. The turn has a radius of 160 m, What is the coefficient of static friction between the track and the car's tires
Assume that the net horizontal force is due to rolling friction only and take free-fall acceleration to be = 9.80 .What is the coefficient of rolling friction for the tire under low pressure.
A circular wire loop, with a single turn, has a radius of 14.0 cm. The loop is in a magnetic field that is decreasing at the rate of 0.500 T/s. determine the magnitude of the emf induced in the loop
Point charges q1=+2.00?C and q2=?2.00?C are placed at adjacent corners of a square for which the length of each side is 4.50cm, What is the electric potential at point b
Two large, parallel, conducting plates are 26cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 2.8 x10-15 N acts on an electron placed anywhere between two plates.
A source produces sound waves of time period .001 second and wave length of 20 cm. find the time taken by sound waves to travel a distance of 800 metres.
Throughout a hard sneeze, your eyes may shut for 0.44s. If you are driving a car at 98 km/h during such a sneeze, how far does the car move during that time.
A dentist uses a small mirror of radius 45 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 14 mm from the tooth, what is the magnification of the resulting image.
f the U.S. demand for electricity continues to grow at about 2% per year, how many more MWe would be needed to meet that demand in 10 years, What fraction of our present use of natural gas is this
The tungsten filament of a certain 100 W light bulb radiates 4.00 W of light. Find the filament's temperature
Sketch complete free body force diagrams for each crate. A person with his ear to the ground sees a huge stone strike the concrete pavement a moment later 2 sounds are heard from an impact one travels in the air and the other in concrete.
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