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A person is standing on a level floor. His head,upper torso, arms and hands together weigh 438N and have a centerof gravity that is 1.17m above the floor. His upper legsweigh 144N and have a center of gravity that is 0.835m above thefloor. Finally, his lower legs and feet together weigh 87Nand have a center of gravity that is 0.270m above the floor. Relative to the floor, find the location of the center of gravity for the entire body.
Joey weighs 77 lb and sits on a seesaw at a distance of 30 inches from the fulcrum. Jenny weighs 67 lb and sits on the opposite side of the seesaw at a distance of 48 inches from the fulcrum. how far away from the fulcrum should he sit
Today's terrestrial background radiation is about 50 mrem/year, mainly due to the uranium and thorium decay chains, and potassium. The earliest evidence of life on earth was about 3.5 billion years ago.
If the heat pump is reversed so that it acts as an air conditioner in the summer, what would be its coefficient of performance
Player serves a tennis ball 2.2 m above the ground. The ball leaves his racquet with a speed of 56 m/s at an angle 10 degree below the horizontal. what's the ball clea the net
What is the magnitude of the force on the bead. find the charge of the particle.
The Achilles tendon inserts on the calcaneus at a distance of 8cm from the axis of the ankle joint. What torque is created by these muscles about the ankle joint
An electron is held up against the force of gravity by theattraction of a fixed proton some distance above it. How far above the electron is the proton?
The cylindrical space station, 200 m in diameter rotates in order to give artificial gravity of 3.0 g for the occupants. How much time does it take, in seconds, to complete one revolution.
The equation of a transverse wave on a string is y = (2.0 mm) sin[(19 m-1)x - (625 s-1)t]. The tension in the string is 11 N. Find the linear density of this string
An object 1,75 cm high is placed 36 cm in front of a concave mirror of focal length 12 cm. Calculate the image distance and image hight mathematically; state if the image is real or virtual and include a ray diagram in your answer.
A spaceship moves away from Earth at a speed 0.297 c, Determine the speed of the shuttle relative to Earth
A proton (with a rest mass m=1.67×10?27kg) has a total energy that is 4.00 times its rest energy. What is the magnitude of the momentum p of the proton
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