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A 55.3-kg ice skater is moving at 4.00 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.804 m around the pole.
(a) Determine the force exerted by the horizontal rope on her arms.
_____________N
The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm (red) and 486 nm (blue). Light from a hydrogen lamp illuminates a diffraction grating with 460 lines/mm , and the light is observed on a screen 1.7 m b..
An explorer in dense jungles of equatorial Africa leaves his hut. He takes 41 steps at an angle 45 north of east, then 81 steps at an angle 60 north of west, then 51 steps due south. Suppose his steps all have equal length. Save him from becoming ..
Two free particles (that is, free to move) with charges +q and +4q are a distance L apart. A third charge is placed so that the entire system is in ?quilibrium. Find out the location, magnitude, and sign of the third charge.
A glass fiber with a thermal expansion coefficient of 5x10^6 C^-1, an elastic modulus of 72 GPa, Calculate the maximum flaw size that this fiber can tolerate
Clarify how Einstein's contribution to understanding the force between the earth and the moon differed from Newton's. Include a short statement of Einstein's explanation in the answer.
When the walkway exerts a load force of 9900 N on one of the support points, through what distance does the point move down?
A 100 kg shot-putter pushes a forward and upward force on a 4 kg shot with a force of 1000N, Calculate the vertical and horizontal components of this resultant force
A 93.0 kg bungee jumper jumps off a bridge and undergoes simple harmonic motion. If the period of oscillation is 11.2 s, what is the spring constant of the bungee cord
A merry go round at a children's playground can be approximated as a uniform circular disc with a diameter of 3.72 m and a mass of 288 kg. A constant force of 178 N is applied perpendicular to the outer edge of the merrygoround. How long does it t..
A neon sign in a shop operates at around 12 kV (rms). A transformer is to step-up the 120 V (rms) line voltage to that value. How many turns must be placed into the primary coil
A car is traveling at 27 m/s when the driver spots a large pothole in the road a distance 44 m ahead. She immediately applies her brakes. If her acceleration is -9.7 m/s2, does she arrange to stop before reaching the pothole.
A 300 kg piano slides 4.50 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
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