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A 650-N Marine in basic training climbs a 11.5-m vertical rope at a constant speed in 9.50 s. What is his power output?
W
A somewhat longer cable replaces the old and is attached to the steel bar 5 m from its upper end, connecting to the same place on the wall as before and maintaining the same angle between the bar and the wall.
(a) What is the rate of energy radiation per unit area of a blackbody at a temperature of 294 K. (b) What is the rate of energy radiation per unit area of a blackbody at a temperature of 2940 K
Suppose a manufacturing plant has an average sound intensity level of 97.0 dB created by 25 identical machines. Find the sound intensity created by one such machine
question1using a simply pulley or rope system a crewman on an arctic expedition is trying to lower a 6.30 kg crate to
A 12.0-g piece of Styrofoam carries a net charge of -0.746 µC and is suspended in equilibrium above the center of a large, What is the charge per unit area on the plastic sheet
What is the current in the element of an electric clothes dryer with a resistance of 8.2? when it is connected to 240 V
A typical power plant uses some fuel as the source of heat (QH) to drive a heat engine that does work (W) to drive a generator that is connected to the electrical grid. What is the efficiency and how do we express this in power
A group of students need to cross a river in the shortest time. In what direction should the students head the boat
A 1.1 µF capacitor has an electric field of 1.2x105 V/m between two metal plates 1 mm apart. What is the energy stored on the capacitor
You are driving into St. Louis, Missouri, and in the distance you see the famous Gateway-to-the-West arch. how far (in kilometers) are you from the base of the arch
A rock is thrown vertically upward from the edge of a cliff. The rock reaches a maximum height of 19.6 m above the top of the cliff before falling to the base of the cliff, How high is the cliff
Two protons are moving directly toward one another. When they are far apart, What is the distance of closest approach?
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