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A positively charged object with a mass of 0.114 kg oscillates at the end of a spring, generatingELF (extremely low frequency) radio waves that have a wavelength of5.04 107 m. The frequency of these radiowaves is the same as the frequency at which the object oscillates. What is the spring constant of the spring?
Two circular metal plates of radius 0.21 m and thickness 8.3 mm are used in a parallel plate capacitor. A gap of 3.9 mm is left between the plates, and half of the space (a semicircle) between the plates is filled with a dielectric for which ? = 10.9..
at what frequency would the wavelength of sound in air be equal to the mean free path of oxygen molecules at 1.03 atm
A flint glass plate (n = 1.66) rests on the bottom of an aquarium tank. Calculate the apparent thickness of the plate as viewed from above the water
If the jet is moving at a speed of 1600 km/h at the lowest point of the loop, Calculate the pilot's effective weight at the top of the circle
During an Apollo lunar landing mission, the command module continued to orbit the Moon at an altitude of about 111 km. How long did it take to go around the Moon once
A 12 gram ball is dropped form a height of 2.50m and is moving and is moving at 3.2m/s just before it hits the floor. how much total mechanical energy was lost in the fall
The bolts on the cylinder head of an engine require tightening to a torque of 92 m·N. If a wrench is L = 30 cm long, what force perpendicular to the wrench must the mechanic exert at its end? If the six-sided bolt head is 15 mm in diameter, estimate ..
A person 1.6 m tall stands 4.9 m from a reflecting globe in a garden. How large is the person's image
With a 1400 Mohm resistor across its terminals, the terminal voltage of a certain battery is 2.56V. Find the internal resistance of this battery
A cylindrical container 2.00 tall contains mercury to a certain depth; the rest of the cylinder is filled with water. If the pressure at the bottom of cylinder is two atmospheres, what is the depth.
Many chemical reactions release energy. Suppose that at the beginning of a reaction, How much electric potential energy was lost in this reaction (in units of eV)
A plate carries a charge of -3.11mC,while a rod carries a charge of +2.02mC.How many electrons must be transferred from the plate to the rod,so that both objects have the same charge.
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