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A block is being pulled over a table by a weight W=10N. The block is in contact with an oil film with a viscosity of 5x10^-4 Pa*s. The bottom area of the block is A=1m^2, and the thickness of the oil film is h=.01mm. Find the steady velocity U of the block. Assume a linear velocity distribution in the oil film and neglect the cord weight, pulley friction and air resistance.
A car with mass M traveling with speed V has a kinetic energy KE. What is the kinetic energy of a second car that has mass M/2 and travels with speed 2V
You construct two wire-frame cubes, one using (infinitely thin) copper wire, the other using (infinitely thin) aluminium wire. Find the difference in volume between the cubes
An incident X-ray photon of wavelength 0.2800 nm is scattered from an electron that is initially at rest. find the momentum gained by the electron
An astronaut travels to the nearest start system. 10 light years away, and returns at a speed of 0.5c. How much has the astronaut aged relative to those people remaining on Earth?
A transformer is designed to change 120 V into 10,000 V, and there are 164 turns in the primary coil. How many turns are in the secondary coil
A capacitor consisting of two concentric spheresof radius R1 and R2 =3.50·R1 has a capacitance of C = 5.00 pico Faradsand is charged to a potential difference of 86.0 Volts. Calculate the energy stored in the capacitor
a 1.99 kg block slides on a rough, horizonatl surface. The block hits a spring with a speed 2.16 m/s, what is the force constant of the spring
A projectile is fired horizontally from a gun that is 48.0 m above flat ground, emerging from the gun with a speed of 280 m/s. How long does the projectile remain in the air
An elevator moves downward in a tall building at a constant speed of 4.00 m/s. Estimate the highest floor from which the bolt can fall if the elevator reaches the ground floor before the bolt hits the top of the elevator
The Golden Gate Bridge in San Francisco has a main span of length 1.28 km, one of the longest in the world. At what temperature would the wire reach its elastic limit
If a person of mass M simply moved forward with speed V , his kinetic energy would be (1/2 MV^2) . However, in addition to possessing a forward motion, What is the average angular velocity of his arms and legs
a cloud mass moving across the ocean at an altitude of 2000 m encounters a coastal mountain range. as it rises to a
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