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A cylindrical container is to be designed to hold 54 cm3. of canned fruit. Find the radius x of the base and the height h, for which the amount of metal needed is as small as possible.
How much energy is necessary to bring the system back
A wave travels on a string at 60m/s. A second string of 20 percent greater linear density has the same tension applied as in the first string. What will be the resulting wave speed in the second string?
q1. an aluminum cup contains 225 g of water and a 40-g copper stirrer all at 27degc. a 400-g sample of silver at an
An LP turntable must spin at 3.520 rad/s to play a record. How much torque must the motor deliver if the turntable is to reach its final angular speed in 1.900 revolutions, starting from rest?
A basketball player makes a jump shot. The 0.607 kg ball is released at a height of 1.97 m above the floor with a speed of 7.22 m/s, What is the work done on the ball by air resistance
A sledge (including load) weighs 1400 lb. It is pulled on level snow by a dog team exerting a horizontal force on it. The coefficient of kinetic friction between sledge and snow is .05. How much work (in ft lb) is done by the dog team pulling the sle..
A 4.80 kg disk is free to rotate about an axis during its center (+z); the plane of the disk is horizontal and the radius of the disk is 36.0cm. It initially rotates with an angular velocity of (18.0 rev/s, -z).
What was his average swimming speed during the second half of the race if he tied the record, which was at an average speed of 2.05 m/s
Photons of wavelength 334 nm are incident on a metal plate in a photocell and electrons are ejected. What is the maximum wavelength of photons that will eject electrons from this metal
A coil is wrapped by 200 turns of wire on a square frame with sides 18cm. A uniform magnetic field is applied vertical to the plane of the coil and into the page. If the field changes uniformly from 0.50T to 0 in 8.0 seconds, discover the average val..
a 180 lb man and a 120 lb woman stand side by side at the same end of a 300 lb boat ready to dive each with a 16 fts
Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. find the angular speed of the neutron star
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