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Dan’s biceps muscle has a moment arm about the elbow joint of 0.029 m when the joint is held at a joint angle of 90 degrees and can produce a force of 615 N. His forearm is 0.21 m from the elbow joint center to the center of his hand where he grips a handle. His forearm has a mass of 1.2 kg and the center of mass is located directly above the elbow joint. How much force (magnitude only) can he deliver to the handle with force from his biceps?
A person pushes a 16-kg lawn mower at constand speed with a force F= 80N directed along the handle, which is at an angle of 45 degrees to the horizontal. Calculate the magnitude of the Normal force exerted on the mower.
a metal sphere of radius 19 cm has a net charge of 6.0 10-8 c.a what is the electric field at the spheres surface?b if
Consider an airplane window (area 0.32 m2). If the pressure inside the plane is atmospheric pressure and the pressure outside is 15% of Patm, what is the force on the window
the fermilab tevatron could accelerate protons and anti-protons to kinetic energies of 1000 gev 1 tev. by how much in
An old-fashioned vinyl record rotates on a turntable at 49rpm . What are the angular speed in rad/s and the period of the motion
A 0.250-kg piece of aluminum that has a temperature of -173 °C is added to 1.0 kg of water that has a temperature of 1.4 °C. determine the mass of water that has been frozen into ice
Electrons in an x-ray tube are accelerated through 110 kV and directed toward a target to produce x rays. Calculate the power of the electron beam
a glass lens nglass 1.52 has a 134 nm thick anti-reflective film nfilm 1.39 on one side. light moving through the air
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.
Jessica's weight is 540 newtons. According to the Third Law, if the Earth pulls on Jessica with a force of 540 N, then Jessica pulls on the Earth with a force of 540 newtons that acts in the opposite direction.though , if Jessica stumbles while rol..
A longitudinal wave travels on a slinky or any long spring. The wave is represented by the equation x(x, t) = 2.10 cm cos(2000 rad/s t + 40.0 m-1x)
Two identical small insulating balls are suspended by separate 0.23-m threads that are attached to a common point on the ceiling, Determine the charge on each ball
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