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A horizontal power line carries a current of 4880 A from south to north. Earth's magnetic field (75.1 µT) is directed toward the north and is inclined downward at 52.0° to the horizontal. Discover the magnitude of the magnetic force on 110 m of the line due to Earth's field.
An archeologist has discovered an old artifact. Its carbon-14 content is found to be 41.7 % of that in a fresh sample of wood. Find the age of the sample
The figure shows a lower leg being exercised. It has a 49-Nweight attached to the foot and is extended at an angle with respect to the vertical. Consider a rotational axis at theknee, as indicated. (a) When =89°, find the magnitude of the torque that..
If the bullet leaves the gun at a speed of 280 m/s, by how much will it miss the target? Illustrate at what angle should the gun be aimed so as to hit the target?
A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, What is the work done by the field on the electron
An astronaut on earth can throw a ball straight up to a height of 13m. How high can he throw the ball on Mars
A hockey puck moving at 34m/s slams through a wall of snow 40cm thick. It emerges moving at 17m/s. find the time the puck spends in the snow
One mole of a gas expands from a volume of 5 liters and a temperature of 273 K to a volume of 12 liters and a temperature of 300 K. What is the work done by the gas on the environment?
A ball experiences a change in momentum of 12.5 N·s. If the time of interaction is 0.18 s, what is the magnitude of the average force acting on the ball
a cat with mass 4.5 kg is sitting on top of a turntable of mass 20 kg and radius 1.4 m. Calculate the magnitude of the angular velocity of the turntable in rotations per minute
If the gas is irradiated with monochromatic light of 466 nm wavelength, what is the wavelength of the Raman scattered light
An airplane with a mass of 2.6*10^6 kg. has the air flow past the lower surface of the wings at 100 m/s. If the wings have a surface area of 1200 m2, how fast should the air flow over the upper surface of the wing if the plane is to stay in the ai..
The height of a helicopter above the ground is given by h = 2.95t^3, where h is in meters and t is in seconds. At t = 2.50 s, the helicopter releases a small mailbag.
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