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A race car driver must average 199.0 km/h over the course of a time trial lasting ten laps. If the first nine laps were done at 195.0 km/h, what average speed must be maintained for the last lap? (Answer to the nearest?
A 75-kg piece of metal has specific heat 430 J/kg°C and is initially at 950°C. To cool it down, it is dunked into 710 kg of oil that has a temperature of 32°C and specific heat of 2700 J/kg°C. Assuming that heat flows only between the oil and the m..
The bullet lodges in the forehead of the victim and comes to a rest. If the victim's head has a mass of 5 kg and was at rest before impact, what is the stress on the cervical vertebra
An electromagnetic wave travelling the +z direction has a maximum magnetic field of 10^-7 T in the negative y direction at z = 0 and t = 0. The magnetic field falls to zero in 3 x 10^-16 seconds.
An electron of mass 9.11 10-31 kg has an initial speed of 2.80 105 m/s. Determine the magnitude of the force exerted on the electron
question1a boat crosses a river of width 228 m in that the current has a uniform speed of 1.97 ms. the pilot maintains
The length of a hollow pipe is 658 cm. The air column in the pipe is vibrating and has four nodes. Find the frequency of the sound wave in the pipe
A block of mass 1.90 kg is pushed 4.60 m along a frictionless horizontal table by a constant 16.0 N force directed 27.0° below the horizontal.
A predatory fish can accelerate from rest to 5 m/s in 0.28 s. What is the acceleration of the fish
What fraction of ice is submerged when it floats in freshwater, given the density of water at a temperature of 0 degrees celcius is very close to 1000 kilograms/meter cubed
question1take two indistinguishable metallic tumblers a and b. insulate one tumbler say a by wrapping chart paper
A woman pulls a loaded sled of mass m = 75 kg along a horizontal surface at constant velocity
The left end of a long glass rod 8.00cm in diameter and with an index of refraction of 1.60 is ground, Find the position of the image of the arrow formed by paraxial rays incident on the convex surface
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