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Question1
A relaxed biceps muscle requires a force of 25.0N for an elongation of 3.0 cm; below maximum tension, the same muscle requires a force 500N for the same elongation. Find the Young's modulus for the muscle tissue under each of these conditions if the muscle can be modelled as a uniform cylinder with the initial length of 0.200 m and a cross-sectional area of 50 cm^2
Question2
A swimming pool has dimensions 32.0 m 8.0 m and a flat bottom. The pool is overflowing to a depth of 1.70 m with fresh water.
(a) What is force exerted by the water on the bottom?1 N down
(b) what is force exerted by the water on each end? (The ends are 9.0 m.)2 N outward
(c) What is force exerted by the water on each side? (The sides are 32.0 m.)3 N outward
An electron and a proton are separated by 2.4 nm, What is the magnitude of the force on the electron
A 52.5 g Super Ball travelling at 30 m/s bounces off a brick wall and rebounds at 16.0 m/s. A high-speed camera records this event. If the ball is in contact with wall for 3.25 ms, what is the magnitude of the average acceleration of ball during t..
A loaded railroad car of mass 6000 kg is rolling to the right at 2.0 m/s when it collides and couples with an empty freight car of mass 3000 kg, What is the velocity of the pair after the collision
A 3.6 m long steel wire has a cross-section area of 0.047 cm2. Its proportional limit has a value of 0.0015 times its Young's modulus, What is the maximum weight that the wire can support
A football is kicked at ground level with a speed of 40 m/s at an angle of 32.0 degrees to the horizontal. How much later does it hit the ground
At 12°C, a brass cube has an edge length of 25 cm. What is the increase in the cube's surface area when it is heated from 12°C to 97°C
Calculate the period of a satellite orbiting the Moon, 130km above the Moon's surface. Ignore effects of the Earth
A baseball is hit at 30.0 m/s at an angle of 53.00 above the horizontal. What was the original distance between the outfielder and the batter
A particle undergoes two displacements, measured from the positive x-axis, with counter- clockwise positive, find the magnitude of the second displacement in meters
The engine of a large ship does 2.10 ? 108 J of work with an efficiency of 4.00%. How much waste heat is produced
A man drags a 75.0-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. Find the magnitude of the tension in the strap
What is the smallest thickness of a soap film (n = 1.33) that would appear black if illuminated with 450 -nm light? suppose there is air on both sides of the soap film.
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