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You swing one yo-yo around your head in a horizontal circle. Then you swing another yo-yo with twice the mass of the first one, but you don't change the length of the string or the period. How do the tensions in the strings differ?
An archer fires an arrow by an initial velocity of 21 m/s at an angle of 50 from the horizontal. The arrow lands on a hill that is 5.0 m higher than its initial height. Ignore the effects of air resistance. What speed does the arrow have when it land..
A particle leaves the origin with a speed of1 × 106 m/s at 30? to the x axis. It moves in a constant electric field E = Eyˆj. Find Ey such that the particle will cross the x axis at x = 2.5 cm if the particle is an electron. The fundamental charge is..
the core of an optical fiber has an index of refraction of 1.27 while the index of refraction of the cladding
A 4-m x 5-m x 7-m room is heated by the radiator of a steam-heating system. The steam radiator transfers heat at a rate of 10,000 kJ/h and a 100-W fan is used to distribute the warm air in the room.
We are told that 3 non-interacting particles of mass m bounce back and forth in one dimension between two rigid walls separated by a distance L.
What is the frictional force
A physics book slides off a horizontal table top with a speed of 1.25m/s. It strikes the floor after a time of 0.440s. Ignore air resistance. Find the height of the table top above the floor
you ar charged to work on reducing expenditures for a company.you think that the company can save considerable money on fuel costs by lowering the room temperature of the building for daily use, How much heat will be saved each morning
a concrete block with a specific weight of 23.6 knm3 is suspended by a rope in a solution with a specific gravity of
man 1 was experimenting with friction and attempting to pull man 2 across the surface of a floor. man 1 applies a
At the Winter Olympics, an athlete rides her luge down the track while a bell just above the wall of the chute rings continuously. Find the speed of the athlete
The atomic mass number of copper is A=64. Suppose that atoms in solid copper form a cubic crystal lattice. To envision this, imagine that you place atoms at the centers of tiny sugar cubes, and then stack the little sugar cubes to form a big cube. If..
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