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A pendulum is composed of a mass m suspended from the ceiling by a massless string of length l. the mass is pulled back, raised and released. if the tension is in the string at the bottom of the string i t. how high was the mass raised above the bottom of the string.
A sound wave traveling at 341m/s is emitted by foghorn of a tugboat. An echo is heard 3.30s later.
A 450 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m, What is its average power output in watts and horsepower if this takes 7.30 s
A slide projector needs to create a 96 cm-high image of a 2.20 cm-tall slide. How far should you place the lens from the slide.
The femur is a bone in the leg whose minimum cross-sectional area is about 3.4 x 10-4 m2. Find the maximum stress that this bone can withstand
MRI (magnetic resonance imaging) is a medical method that produces detailed "pictures" of the interior of the body. The patient is placed into a solenoid that is 40cm in diameter and 1.0 m long.A100 A current creates a 5.0T magnetic field in the sole..
A 1500 lb car traveling 80 mph due west is struck by lightening and charged with an enormous negative charge. If the Earth's magnetic field (.3 gauss) just exactly picks up the car while it is still moving, how much charge is there on the car?
This observer is 1.03 km away from the antenna. A second observer hovers in a blimp at an altitude of 561 m and measures the radiation intensity from the antenna when she is 1.37 km from the antenna. What intensity, in milliwatts per square meter,..
A point charge q = +4.3 µC is placed at each corner of an equilateral triangle with sides 0.21 m in length. What is the magnitude of the electric field at the midpoint
The leg and cast weigh 220 N. find out the weight and the angle needed so that no force is exerted on the hip joint by the leg plus the cast.
A particular coal-fired electric power station uses7.5x109 kg of coal per year to produce 950 MW ofelectrical power. The coal contains 2.4% sulphur bymass. If a scrubber is used to remove 85% of the sulphur fromthe exhaust gases in the form of CaS..
A circular loop in the plane of a paper lies in a 0.85 T magnetic field pointing into the paper. Find what is the magnitude of the average induced emf
What is the difference in blood pressure ({rm mm-Hg}) between the top of the head and bottom of the feet of a 1.80-{rm m}-tall person standing vertically.
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