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A ball of mass 50g tied to the end of a 50cm inextensible string is whirled around in a vertical circle. Find the tension in the string when the ball is at the top of the circle. Take g=10ms2.
A glass plate 2.5 cm long is separated from another glass plate by a strand of someone's hair (diameter 0.010 mm). How far apart are the adjacent interference bands
Two parallel sheets each have large area A and are separated by a small distance R. The surface charge densities are σ and -σ . You wish to pull one of the sheets away from the other, by a small distance x. How much work does this require?
The conduction electrons in a metal can be considered for some purposes as an ideal gas. Find the beam current in amperes
A 70-? electrical appliance and a 90-? electrical appliance are plugged into the outlets of a house. By what factor will the power used change
A jet pilot takes his aircraft in a vertical loop. If the jet is moving at a speed of 360 m/s at the lowest point of the loop, determine the minimum radius of the circle
A ball is thrown directly downward with an initial speed of 8.95 m/s from a height of 30.4 m. After what time interval does it strike the ground
A high speed test track for cars has a curved section an arc of a circle of radius r= 752 meter. Find the normal force from the road on the car in this situation
A soccer player kicks the ball toward a goal that is 27.0 m in front of him. Find the speed of the ball when the goalie catches it in front of the net
Two waves of light with wavelength 360 nm are combined. If the two waves are initially in phase, what are the first three differences in distance that the second wave could travel
An induced emf occurs in a conducting loop of wire 1.12m long as its shape is changed from a circle to an equilateral triangle. What is the average magnitude of the induced emf if the change inn shape occurs in 1 sec and the local 1.0T magnetic field..
Your camera's zoom lens has an adjustable focal length ranging from 78.0 to 200 mm. What is its range of powers
A frictionless pulley has the shape of a uniform solid disk of mass 6.00 and radius 28.0 . A 2.70stone is attached to a very light wire that is wrapped around the rim of the pulley(Figure 1) , and the stone is released from rest. As it falls down,..
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