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Two window washers, Sally and Tom, are on a 3.00 m long 345 N uniform scaffold supported by two cables attached to its ends. Sally weighs 750N and stands 1.00 m from the left end. Two meters from the left end is the 500 N washing equipment. Tom is 0.500 m from the right end and weighs 1000 N. Given that the scaffold is in rotational and translational equilibrium, what are the forces on each cable?
A 0.6410-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. Later, you notice that the ice cube has completely melted into a puddle of water.
In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.70{\rm m/s} relative to the ground. What is the magnitude of the ball's velocity relative to Juan
A grandfather clock has a brass pendulum with a period of 1 sec at 20C. in the summer, the temperature of your house rise by 5 C. By how much does the period of the pendulum change
a helium nucleus charge 2e moves through a potential difference v -0.60 kv. its initial kinetic energy is 2.90x10-16
A train is traveling at 100 m/s. The engineer applies the brakes because he sees the Batmobile stuck on the tracks ahead. How long does it take the train to reach the Batmobile
A diver observes a bubble of air rising from the bottom of a lake to the surface, What is the ratio of the volume of the bubble as it reaches the surface to its volume at the bottom
The cylindrical beam of a 80.0 mW laser is 0.80 cm in diameter. What is the rms value of the electric field
An organ pipe is 1.17 m long. The temperature of the air is 20 degree C. What is the fundamental harmonic frequency of this pipe when it is closed at one end
The record distance in the sport of throwing cowpats is 81.1 m. This record toss was set by Steve Urner of the United States in 1981. Assume the initial launch angle was 45° and neglect air resistance. (a) Determine the initial speed of the projec..
q1. after being accelerated to a speed of 1.43times105 the particle enters a uniform magnetic field of strength 1.00
you are given a slide with two slits cut into it and asked how far apart the slits are. you shine white light on the
Jupiter is the largest planet in the solar system, having a massand radius that are, respectively, 318 and 11.2 times that of Earth. Suppose that anobject falls from rest near the “surface” of each planet and that the acceleration due to gravity r..
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