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Apiece of concrete pipe being stored at a construction site is shaken loose in an earthquake and rolls down a hill. The pipe is a cylindrical shell 2.0 m is diameter, 3.2m long and 5 cm thick. Concrete has a density of roughly 2300 kg/m3. When the pipe reaches the street after descending a vertical distance of 45m, how fast is it going?
A cylindrical section of tree trunk 50 cm in diameter and 75 cm long is seen rolling down a road below a saw hill at a speed of 12 m/s. (wood has a density of about 750 kg/m3) Assuming that the road has an incline 5% (meaning that if you travel 100 m along the slope of the road, you go up 5 m), at least how far up the road is the sawmill? Describe any assumptions or approximations that you make.
A basketball with a mass of 0.15 kg and a radius of 0.15 m is thrown to you rotating at 5 times per second. What is the magnitude of the frictional force that you have to exert on it with your hands to stop it rotating within 0.1s when you catch it? (Hint: the moment of inertia of a spherical shell is 2/3 MR2, where M and R are the shells mass and radius, respectively.)
find the magnitude of the electric field at a point midway between two charges 24.3 times 10-9 c and 75.5 times 10-9 c
You pull downward with a force of 32 N} on a rope that passes over a disk-shaped pulley of mass 1.2 kg and radius 0.07 5m. Find the linear acceleration of the 0.61 kg mass.
The brightest star in the night sky is Sirius, which is at a distance of 8.3x1016 m. When we look at this star, how far back in time are we seeing it? Enter answer in years. Do not enter units.
Two runners start simultaneously from the same point on acircular track of length 205 m and run in the same direction. How far from the starting point will the fast one have run
A 11.45 Volt battery with internal resistance R1 = 0.1373 is said to be charged by a battery charger that is capable of delivering a current i= 9.7959 Amp. Find the minimum emf the battery charger must be able to supply in order to charger the bat..
The fundamental frequency of an open organ pipe corresponds to the A above middle C (440 Hz on the chromatic musical scale). What is the length of the open pipe
light of intensity i0 and polarized parallel to the transmission axis of a polarizer is incident on an analyzer. if
When ultraviolet light of wavelength 2.54*10-5 cm and intensity 0.5 mW/cm2 form a mercury arc falls upon a clean copper surface, the stopping potential necessary to stop the emission of the photo-electrons is 0.59 V.
An 11g bullet is fired into an 11kg wood block that is at rest on the wood table. The block, with the bullet embedded, slides 5.11 across the table. The coefficient of kinetic friction for wood sliding on wood is 0.25.
A bowling ball, which can be treated as a solid sphere with a diameter of 21.6 cm and a weight of 33 kg, The kinetic energy of the bowling ball is
Pushing on the pump of a soap dispenser compresses a small spring. When the spring is compressed 0.50 cm, its potential energy is 0.0025 J.
A small sculpture made of brass (rbrass = 8470 kg/m^3) is believed to have a secret central cavity. What is the volume of the secret cavity
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