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An escalator carries you from one level to the next in an airport terminal. The upper level is 4.7m above the lower level, and the length of the escalator is 7.4m .Assume that your mass is 65kg .
How much work does the up escalator do on you when you ride it from the lower level to the upper level?
How much work does the down escalator do on you when you ride it from the upper level to the lower level?
Unpolarized light passes during two polarizers in turn with polarization axes at 58° to each other. What is the fraction of the incident light intensity that is transmitted?
In a pool game, the cue ball, which has an initial speed of 3.0 m/s, make an elastic collision with the eight ball, which is initially at rest. Find the direction of motion of the cue ball after the collision
It's possible to use the ideal-gas law to show that the density of the earth's atmosphere decreases exponentially with height, What is the weight of a column of air
Two identical masses m are initially at rest, a distance x apart. A constant force F accelerates one of them toward the other until they collide and stick together. What is the (rest) mass of the resulting particle?
A spring stretches by 0.0157 m when a 3.22-kg object is suspended from its end. How much mass should be attached to this spring
A 10 kilogram crate is sliding at a constant speed of 7 m/s along a frictionless horizontal table, when it encounters a friction patch (μs=0.7, μk=0.4). Obtain the speed of the crate after sliding this distance
an amusement park ride is designed such that riders experiance a total magnitude of no more than 30mss acceleration.
The acceleration of a motorcycle is given by 0.,(1) = AI -B1 2, where A = 1.50 m/s3 and B = 0.120 m/ s4 The motorcycle is at rest at the origin at time I = O. (a) Find its position and velocity as functions of time. (b) Calculate the maximum velocity..
a solenoid of 200 turns carrying a current of 2 a has a length of 25 cm. what is the magnitude of the magnetic field at
Light bulb 1 operates with a filament temperature of 2400 K, whereas light bulb 2 has a filament temperature of 1600 K. Find the ratio A1/A2 of the filament areas of the bulbs
Complete the following table by calculating DU, W, and Q (including the algebraic signs) for each of the four steps and for the whole process.
Mrs. Smith has returned to work and feels well. She does not know why she needs to have periodic blood tests due to the warfarin. What is your explanation to Mrs. Smith.
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