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Each year, there is a foot race to the top of the Empire State Building. The vertical distance traveled (using the stairs!) is about 440 meter. The current record for this race is about 9 minute 30 second. If the record holder has a mass of 58 kilogram, find what was his average power output during the race?
W
A 400 cm rope under a tension of 90 N is set into oscillation. The mass density of the rope is 170 g/cm. What is the frequency of the first harmonic mode (m = 2)?
on a windy day a leaf is blown from 5m high central branch tree. as soon as it leaves the branch it is blown at 10ms-1
a 5.0-kg ball moving due east at 4.0 ms collides with a 4.0 kg ball moving due west at 3.0 ms. just after the collision
A particle moves in a circle of radius 83 m with a constant speed of 22 m/s. (a) what is its angular velocity in radians per second regarding the center of the circle? How many revolutions does it make in 30 s?
william tell is said to have shot an apple off his sons head with an arrow. if the arrow was shot with an initial speed
an electromagnetic wave travelling the z direction has a maximum magnetic field of 10-7 t in the negative y direction
An old-style TV set places 50 kV across two plates of a parallel plate capacitor. What is the speed of the electron when it exits the hole in the plate
Suppose a formula for gain in heat energy of an object is H = m(A - B), where m = mass and (A - B) is its rise in temperature between A degrees and B degrees (as in #4). Write an expression for the absolute uncertainty, delta-H, in terms of m, del..
q1. a 2.00 kg metal block slides on a rough horizontal surface inside an insulated pipe. after sliding a distance of
A 500-g particle is located at the point r=4m*i+3m*j-2m*k and is moving with velocity v=5m/s*i -2m/s*j+4m/s*k. What is the angular momentum of this particle about the origin
A proton (rest mass 938.3 MeV/c^2) is confined to a small region of space 2.0 nm wide. What is the uncertainty on its speed due to this confinement
A small immersion heater is rated at 329 W. Compute approximately how long it would take to heat a cup of soup (suppose this is 250 mL of water) from 20°C to 50°C.
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