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A woman whose weight is 530 N is poised at the right end of a diving board with length 4 m. The board now has a weight of 1400 N and is supported by a fulcrum 1.40 m away from the left end. Find the forces that the bolt and the fulcrum exert on the board.
A bat hits a moving baseball. If the bat delivers a net eastward impulse of 1.3 N-s and the ball starts with an initial horizontal velocity of 3.8 m/s to the west, what is the mass of the ball
Two identical small conducting spheres are separated by 0.60m. The spheres carry dissimilar amounts of charge and each sphere experiences an attractive electric force of 10.8N. The total charge on the two spheres is -24uC. The two spheres are now con..
A 0.50-kg mass attached to the end of a string swings in a vertical circle (radius = 2.0 m). When the mass is at the lowest point on the circle, the speed of the mass is 12 m/s. What is the magnitude of the force of the string on the mass at this pos..
You want to take a full-length photo of your friend who is 1.94m tall, using a 35.0mm camera having a 50.0mm lens, How far is the lens from the film
the normal human eye has maximum visual acuity with a pupil size of about 3 mm. for larger pupils acuity decreases due
Which planets have large, distinguishing "spots," and what are these spots called? What are dwarf planets? Why is Pluto not considered a major planet, and what other peculiarity distinguishes it from the major planets?
A 120 V potential difference is applied to a space heater that dissipates 516 W during operation. At what rate do electrons flow through any cross section of the heater element
Two particles are fixed to an x axis: particle 1 of charge -7.50*10^-7 C at x=6.00 cm, and particle 2 of charge +7.50*10^-7 C at x=22.0 cm. what is their net electric field
The coefficient of performance of a refrigerator is 3.4. The compressor uses 20 J of energy per cycle. How much heat energy is exhausted per cycle
An 88 kg spacewalking astronaut pushes off a 640kg satellite, exerting a 640N force for the 0.60 s it takes him to straighten his arms.
A hollow cylindrical conductor has an inner radius a= 1 cm and an outer radius b= 2.6 cm. The total current during the cylinder is 15 A. Using Ampere's Law, Compute the magnetic field at
A child sits still on a swing that is supported by two chains. Each chain makes a 15.0° angle with the vertical. The child's mass is 25.0 kg. What is the tension in each chain? (Ignore the mass of the seat and chains.)
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