Water flows over a section of a waterfall at the rate of 5.6 ✕ 104 kg/s and falls 40 m. How much power is generated by the falling water
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Water flows over a section of a waterfall at the rate of 5.6 ✕ 104 kg/s and falls 40 m. How much power is generated by the falling water
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- A box of unknown mass is sliding with an initial speed v₁ = 4.30 m/s across a horizontal frictionless warehouse floor when it encounters a rough section of flooring d = 2.80 m long. The coefficient of kinetic friction between the rough section of flooring and the box is 0.100. Using energy considerations, determine the final speed of the box (in m/s) after sliding across the rough section of flooring. m/sWhen 150 joules of work is done on a system byan external force of 15 newtons in 20. seconds,the total energy of that system increases by (1) 1.5 × 10^2 J (3) 3.0 × 10^2 J(2) 2.0 × 10^2 J (4) 2.3 × 10^3 JIn the figure, a 3.97 g ice flake is released from the edge of a hemispherical bowl whose radius ris 13.7 cm. The flake-bowl contact is frictionless. (a) How much work is done on the flake by the gravitational force during the flake's descent to the bottom of the bowl? (b) What is the change in the potential energy of the flake-Earth system during that descent? (c) If that potential energy is taken to be zero at the bottom of the bowl, what is its value when the flake is released? (d) If, instead, the potential energy is taken to be zero at the release point, what is its value when the flake reaches the bottom of the bowl? (a) Number (b) Number -5.34e-3 (c) Number 5.34e-3 (d) Number 5.34e-3 Units Units Units Ice flake- Mik Units J
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