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You perform a knee extension exercise on a cable type machine during which your knee joint rotates through an angular displacement of 0.85 radians in 4.35 seconds. At the beginning and end of that time the weight is motionless. That action, together with the various ratios in the machine causes a weight of 422 Newton to be lifted a total of 0.35 meter. Find your average knee torque during the lift?
oppositely charged parallel plates are separated by 5.38 mm. a potential difference of 600 v exists between the
A concave mirror has a radius of curvature of 34.0cm. Find the height of the image of the insect, Find the location of the image of the insect
A coil has an inductance of 0.45 H and a resistance of 42 ohms. The coil is connected to a 5.6 V ideal battery. At what rate is the energy being dissipated
A heat engine operates between a cold reservoir at 10 C and a hot reservoir at 200 C. how much heat must be exhausted as waste
A steel cable has a cross-sectional area 3.44 × 10-3 m2 and is kept under a tension of 3.33 × 104 N. At what speed does a transverse wave move along the cable
An object is placed to the left of a convex lens and on the optical axis. calculate the magnification of the image formed by the lens
Find out the sum of these four vector forces: 12N to the right at 35.0° above the horizontal, 31.0 N to the left at 51.5° above the horizontal, 7.45N to the left at 35.0° below the horizontal, and 24N to the right at 48.0° below the horizontal.
A toy rocket moving vertically upward passes by a 2.1m -high window whose sill is 8.0m above the ground. What was the launch speed of the rocket
A car travels along a road at an average speed of 40km/h andreturns along the same road at an average speed of 60km/h. Calculate the average speed for the round trip
A mine car (mass=490 kg) rolls at a speed of 0.50 m/s on a horizontal track, as the drawing shows. Determine the speed of the car-coal system
A balloon is filled with helium at a pressure of 2.3×105 Pa. The balloon is at a temperature of 14ºC and has a radius of 0.27 m. How many helium atoms are contained in the balloon
A simple pendulum uses a steel wire as the "string." The length of this wire is 1.5 m at room temperature. What is the change in the period of the pendulum
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