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A close grip lat pull downs involves the upper body ,in this exercise, the person pulls the weight of the upper body (arms, trunk and head) upwards using a handle while the legs are wedged under a restraint pad. What is the person's body weight if the magnitude of the force exerted by the handle on each of the person's hands is 264 N ? Hint: the upper body represents 74% of the weight of the person.
Katie and Emily are riding on a circular merry-go-round that has a radius of 5 m. Katie is on a horse that is 2.5 m from the center of merry-go-round and Emily is on a tiger that is 4.5 m from the center of the merry-go-round.
A whale sends an undersea signal to its mate and then gets a response 4.5 seconds later. How far away is the whales mate
Photons of wavelength 530 nm are incident on a metal. The most energetic electrons ejected from the metal are bent into a circular arc, compute the work function of the metal
An Indy car with a speed of 125km/h goes around a level, circular track with a radius of 1.3km. What is the centripetal acceleration of the car.
A large tank with diameter D, open to the air, contains water to a height { H}. A small hole with diameter d ( {d \ll D} ) is made at the base of the tank. Ignoring any effects of viscosity, calculate the time it takes for the tank to drain completel..
A 45-kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 25 degrees , At what angle does the crate begin to slide
The sound level 23 m from a loudspeaker is 65 dB. What is the rate at which sound energy is produced by the loudspeaker
Assume that you need to transfer 4689860 J of energy in ten minutes between the two reservoirs. What should the cross-sectional area of the steel rod
Water at a gauge pressure of P = 4.8 atm at street level flows into an office building at a speed of 0.98m/sthrough a pipe 5.6 cm in diameter. Calculate the gauge pressure in the pipe on the top floor
If an automobile rounds this curve at 30 {rm m/s}, illustrate what is the minimum coefficient of static friction between tires and road needed to prevent skidding?
Two infinite positively charged plates with a uniform chargedensity of 6.80 mC/m2 are placedparallel to the yz-plane with one plane passing through x = 0.65cm and the other through x = -0.65 cm, as shownin the diagram below
A 70 kg teen is riding a popular amusement park ride in which a large cylindrical chamber of diameter 4 meters, is spun along a vertical axis. what torque must have been applied to get it going
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