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The electron beam in a cathode-ray tube is accelerated through apotential difference of 290 V. The electrons then pass through a small circularhole and are viewed on the screen. You observe that the centralbright spot on the screen is the base of a cone with its apex atthe hole. The outer edge of the cone makesa 0.860 ^\circangle with the original direction ofthe electron beam.
a.) What is the diameter of the hole?
Baseball and the Washington Monument On August 25, 1894, What was the ball's direction of motion when caught? answer in degree
one mole of air at 340 k confined in a cylinder under a heavy piston occupies a volume of 5.4 l. the heat capacity of
A 41 cm long solenoid 1.20 cm in diameter is to produce a field of 0.395 mT at its center. How much current should the solenoid carry
The only force on a 4.0-kg body as it moves along the x axis is given by F(subscript "x") = (14 - 6.1x) N, What is the maximum kinetic energy attained by the body
An object of mass m = 4.4 g and charge Q = 32 µC is attached to a string and placed in a uniform electric field that is inclined at an angle of 30.0° with the horizontal. The object is in static equilibrium when the string is horizontal.
A man is lifting a 50kg rock. This weelbarrow is the first kind of lever, and the middle of the wheel is the fulcrum. How big is the man's force on the wheelbarrow to lift the rock
An automobile is sliding down an icy road which is inclined at a 15 degree angle. The mass of the car is 1500 kg. Assume friction acts to slow the car, Determine the normal force on the car
A 5kg block initially at rest is pulled to the ight along a horizontal surface by a constant, force of 30N acting at 53 degrees above the horizontal. Find the net work done on the block
A 60-kg basketball is dropped out of a window that is 6.1m above the ground. The ball is caught by a person whose h&s are 1.5m above the ground. Find gravitational potential energy of the ball.
The capacitance of the cell membrane is estimated to be 89 pF, estimate the total number of sodium ion channels in the membrane of a nerve cell
a jetliner is moving at a speed of 315 ms. the vertical component of the planes velocity is 31.1 ms. determine the
Consider a series RLC circuit where R = 549 ? and C = 1.25 ?F. However, the inductance L of the inductor is unknown. To find its value, What is the inductance of the inductor in millihenrys
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