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A 0.30 m 0.30 m 0.10 m block is suspended from a wire and is completely under water. What buoyant force acts on the block?
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Three moles of a monatomic ideal gas are heated at a constant volume of 2.23 m3. What is the change in the temperature of the gas
When connected in series to a 110-V line, two resistors use one-fourth the power that is used when they are connected in parallel. what is the resistance of the other
Calculate the energy needed to accelerate a spaceship with a mass m = 25 × 103 kg toa speed of 0.40c. Compare this number with the approximate annual energy usage ofEarth, 1021 J
n = 2.90 mol of Hydrogen gas is initially at T = 370 K temperature and pi = 2.27×105 Pa pressure. What would be the temperature of the gas, if the gas was allowed to adiabatically expand back to its original pressure
A soldier has a huge contraption that notches a large 4 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. What is the speed of the arrow
A yo-yo has a rotational inertia of 1140 g·cm2 and a mass of 81.3 g. Its axle radius is 3.27 mm, and its string is 106 cm long, translational kinetic energy, rotational kinetic energy
The supersonic aircraft Concorde has a length of 62.2m when sitting on the ground on a typical day when the temperature is 12.0 oC. What is the temperature of the Concorde's skin in flight
A 1380-kg racecar is driving around a circular track of radius 157 m, What is the magnitude of the net force acting on the vehicle at this time and the force's direction relative to the velocity
A helicopter has blades of length 4.0 m, rotating at 1.0 rev/s about a central hub, find the emf induced between the blade tip and the central hub
The distance between the first and fifth minimum on a screen 60 cm behind the slits is 6.0 mm. What is the wavelength of the light used in this experiment.
Where Is The Net Force Zero? Three point charges lie along the x-axis. The positive charge q1 = 15.0 ?C is at the x = 2.00 m, What is the x coordinates of q3
A magnetic field is perpendicular to a 0.0417 m x 0.0636 m rectangular coil of wire that has 108 turns, What is the magnitude of the change in the magnetic field
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