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A steel section of the Alaskan pipeline had a length of 55.5 m and a temperature of 19.0 deg C when it was installed. What is its change in length when the temperature drops to a frigid -44.7 deg C?
In experiment PH04a, for the resistors in parallel circuit configuration, if we added to the circuit two additional parallel legs with each leg having a single 50 Ohm resistor
A 0.57-kg air cart is attached to a spring and allowed to oscillate. Find the maximum force exerted on it by the spring
Using the equation F=m v^2/r for a force an object in circular motion. Find the radius r of motion of a m=1.6 kg ball travelling in a circular path acted upon by a centripetal force F=7N.
A tight uniform string with a length of 1.80m is tied down at both ends and placed under a tension of 100N/m. What is the mass of the string
A 7.10-kg box is sliding across the horizontal floor of an elevator. Determine the kinetic frictional force that acts on the box
Nobel laureate Richard Feynman (1918-1988) once said that if two persons stood at arm's length from each other and each person had 1% more electrons than protons, the force of repulsion between them would be enough to lift a "weight" equal to that..
If the frequencies are swept over a plusminus.gif2.00% range centered on 86.0 MHz, what is the range of wavelengths broadcast
A parallel-plate air capacitor has a capacitance of 400pF and a charge of magnitude 0.250microC on each plate. The plates are 0.500mm apart. What is the surface charge density on each plate
Two point charges are separated by 6 cm. THe attractive force between them is 20N. What is force between them when they are separated by 9 cm? What is the equation used to arrive at this reply?
Assume the ball leaves the table moving horizontally with this speed. If the table is 1 meter above the floor, what is the horizontal distance the ball travels before it hits the floor
If a person standing inside an elevator is moving up at uniform speed of 4m/s what is the normal force on her feet? Weight of the person is 60kg
Suppose that a small incandescent light bulb (R=2.88 kilo ohms) is connected to a standard European household AC electrical socket, Find the average power dissipated by the light bulb
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