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a diver proposed using a plastic bag full of air immersed in water as an underwater lens is this possible if the lens
a two-slit interference experiment is set up and the fringes are displayed on a screen then the whole apparatus is
as an object is heated to a very high temperature and becomes self-luminous the apparent color of the emitted radiation
two closely wound circular coils have the same number of turns but once has twice the radius of the other how are the
when the hamster is running in a wheel the temperature of the air in the calorimeter rises 160 per hour how much heat
a mass of 670 kg is suspended from a 115 m long string it revolves in a horizontal circle as shown in the figure the
given an angular velocity of 100revmin a mass of 10 kg with radius 75 how does one find the maximum
a simple harmonic oscillator is constructed from a spring which is connected to a mass of 03 kg the mass-spring system
the center of gravity of an irregular object of mass 470 g is shown in the figure you need to move the center of
a magician wishes to create the illusion of a 284 m tall elephant he plans to do this by forming a virtual image of a
two tuning forks have frequencies of 272 hz and 294 hz what is the beat frequency if both tuning forks are sounded
a submarine sends a sonar signal which returns from another ship 2250 s later how far away is the other ship if the
the low range of frequencies used for medical applications is about 1000000 hz what is the wavelength of this frequency
if a washing machines drum has a radius of 26 cm and spins at 40 revs what is the strength of the artificial gravity to
two objects with masses of 250 kg and 590 kg are connected by a light string that passes over a frictionless pulley as
power transmission lines often use a form of electric current called alternating current but in many regions such as
an object with mass m1 490 kg rests on a frictionless horizontal table and is connected to a cable that passes over a
a hockey player is standing on his skates on a frozen lake when an opposing player skates by with the puck moving at a
a rocket sled moved down a track at 632 mih and came to rest in 14 s determine the negative acceleration and the
an indestructible bullet 2cm long is fired straight through a board which is 10 cm thick the bullet strikes the board
two blocks each of mass m 298 kg are fastened to the top of an elevator as in the figurea if the elevator has an
a railroad car is released from a locomotive on an incline when the car reaches the bottom of the incline it has a
a certain orthodontist uses a wire brace to align a patients crooked tooth as in the figure below the tension in the
a car moving at a constant speed of 30ms suddenly stalls at the bottom of a hill the car undergoes a constant
a car approaches the top of a hill that is shaped like a vertical circle with a radius of 516 m what is the fastest