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A 5 m deep river runs on a horizontal 7 m long bridge and 8.5 m wide, which is hung in air 10 m high above the ground. The pressure in the environment is 1 atm.
(a) What is the normal force exerted upwards by the bridge?
(b) What is the force on the side of the bridge? (understanding the problem is part of the question.)
Two charges q1 = 6 µC, q2 = -49 µC, are L = 19 cm apart. A third charge is to be placed on the line between the two charges. How far from q1 should the third charge be placed so that the net electric force on the third charge is minimized?
Suppose the rotational kinetic energy of a solid disc is 1000 J when the disk has an angular velocity of 3 rad/s. What is the disk's moment of inertia
The maximum speed of the photoelectrons from a photoelectric experiment with a silver surface (work function: 4.73 eV) is found to be 3.00× 106 m/s
A 38.0 mH inductor has a reactance of 1.90 k. What is the frequency of the ac current that passes through the inductor
8.0 moles of an ideal monatomic gas are compressed from a volume V1 = 0.26 m3 to V2 = 0.13 m3 at a constant pressure of 90 kPa
A sprinter can accelerate with constant acceleration for 4.00s before reaching top speed. He can run the 100-meter dash in 10 s.
A particular guitar string is supposed to vibrate at 214 Hz, but it is measured to actually vibrate at 272 Hz. By what percentage must the tension in string be changed to get the frequency to the accurate value.
A 57.3-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.770 and 0.405, What horizontal pushing force is required to just start the crate moving
The sun and solar system actually are not at rest in our milky way galaxy. what would be the mass of the galaxy
a ramp consisting of a large piece of cardboard poster board or similar thin and smooth materiala toy car such as a
A uniform magnetic field (0.20 T) is directed 35 degrees above the horizontal, penetrating a horizontal circular coil (radius 6.0 cm)
how would the intensity of light vary with distance from the source according to the a wave theory b particle photon
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