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Water flows straight down from an open faucet. The cross-sectional area of the faucet is 1.7 × 10-4m2 and the speed of the water is 0.70 m/s as it leaves the faucet. Ignoring air resistance, find the cross-sectional area of the water stream at a point 0.11 m below the faucet.
If the heat engine used to harvest the energy from humans was operating at the theoretical maximum efficiency what temperature would the cold reservoir have to be make this energy source viable? (Assume the hot reservoir is that of the average ski..
A man pulls a 50.0 kg box at constant speed across the floor. What is the value of the normal force
A horizontal 2-m-diameter gate is located in the bottom of a water tank (5m depth). Determine the force F required to just open the gate
Distance between focal plane and lens
What temperature change would reason a 0.20 % enhance in the volume of a quantity of water that was at first at 20 ^circ {rm C}.
Suppose a star the size of our Sun (R0 = 695,500 km) rotates at a speed of 1.0 revolution every 12 days. If it were to undergo gravitational collapse to a neutron star of radius 11 km, what would its new rotation speed be? (rad/s)
A 56-? loudspeaker, a 8.9-? loudspeaker, and a 2.3-? loudspeaker are connected in parallel across the terminals of an amplifier. Determine the equivalent resistance of the three speakers
A man enters a tall tower, needing to know its height. How tall is the tower
A group of students are camping in the middle of the forest on a very dark night. Their torch batteries went flat hours ago. find the speed of the unidentified noisy object
The force lightly damped harmonic oscillator of mass, 0.062 kgs, driving force F0 = 4.4 N and linewidth 35 radians/second, Determine the new damping constant
A resonant circuit in a radio receiver is tuned to a certain station when the inductor has a value of 0.196 mH and the capacitor has a value of 28.2 pF. Calculate the frequency of the radio station
A rock of mass 54.5 kg breaks loose from the edge of a cliff and falls straight down. What is the magnitude of the acceleration of the rock
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