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A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 10.0 s.
a) How tall is the tower?
b) If this pendulum is taken to the Moon, where the free-fall acceleration is 1.67 m/s2, what is the period there?
A typical compact disc stores information in tiny pits on the disc's surface. What's the frequency of electromagnetic waves that have a wavelength equal to the typical CD pit size
A 1 kg object rests at the top of a quarter pipe cylindrical ramp of radius 1 m. What work was done on the object by this frictional force
light from a helium - neon laser is shinedon a slit of width 0.02mm. Describe qualitatively the pattern of light seen on ascreen 1.0 meter away. and how would the pattern be different if the slit were 0.06mmwide instead of 0.02mm?
A goldfish bowl is spherical, 8 cm in radius. A goldfish is swimming 3.0 cm from the wall of the bowl. Where does the fish appear to be to an observer outside
One mole of an ideal monatomic gas is expanded adiabatically and quasi-statically from a pressure of 1,172 kPa and a temperature of 273 K to a pressure of 279 kPa. What is the final volume of the gas in cubic metres?
A box of bananas weighing 40.0 Newton rests on a horizontal surface. If no horizontal force is applied to the box and the box is rest, find how large is the friction force exerted on the box
consider a uranium nucleus to be a sphere of radius r 7.4 x 10-15 m with a charge of 92e distributed uniformly
When a fighter pilot makes a very quick turn, he experiences a centripetal acceleration. What is the minimum radius of curvature that he can take without blacking out
an elevator and its load have a combined mass of 1450 kg. find the tension in the supporting cable when the elevator
A convex lens of focal length 5 cm is usedas a magnifying glass. At what distance from a tiny insect should you hold this lens to get a magnification of +2.4?
An air-filled ion chamber is operated at a pressure of 3 atm, find the saturated ion current corresponding to a gamma-ray exposure of 1 mR/h
A loaded ore car has a mass of 950 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch, What maximum power must the motor provide
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