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For safety in climbing, a mountaineer uses a nylon rope that is 50 m long and 1.0 cm in diameter. When supporting a 90-kg climber, the rope elongates 1.8 m. Find its Young's modulus.
A 1 kg object moves at D.8e relative to Earth. Calculate the momentum and energy of the object and Determine the Lorentz transformation matrix from Earth's frame to the object's frame
A box is pushed across the floor, slide with a constant velocity, and is opposed by a friction force of 25N. What is the magnitude of the force? Choose the correct answer. A.Less than 25N B.Zero C.Greater than 25N D.25n
A 2.70-kg object is moving in a plane, with its x and y coordinates given by x=7t^2-3 and y=2t^2+3, Find the magnitude of the net force acting on this object at t=1.60s
A person starts from rest at the top of a large, frictionless, spherical surface, and slides into the water below, At what angle does the person leave the surface
Two small metallic spheres, each of mass m = 0.180 g, are suspended as pendulums by light strings of length L, How long are the strings
Now the gymnast (not holding any additional mass) walks directly above right support. What is the force the left support exerts on beam.
The car and minivan collide and stick together. Suppose the direction of the wreckage after the impact is 42.0° above the x axis.
When light of wavelength 350 nm falls on a potassium surface, electrons having a maximum kinetic energy of 1.31 eV are emitted. determine the work function of potassium
Sodium-24, which is used to locate blood clots in the human circulatory system, has a half-life of 15.0 hours. Calculate the mass of the remaining sodium-24
A boy gets ready to slide down an icy hill with his sled.Assume that the friction from the ground is negligible. How far will the boy have slid after 3 seconds with that acceleration
Consider two parallel-plate capacitors, C1 and C2, that are connected in parallel. The capacitors are identical except that C2 has a dielectric inserted between its plates. What is the final voltage across the two capacitors
An elevator is moving upward at 1.07 m/s when it experiences an acceleration 0.30 m/s2 downward, over a distance of 0.71 m. What will its final velocity be
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