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The coils of a motor's rotor have resistance of 2.0 Ω. When the motor runs at full speed, powered by 115V linevoltage it draws a current of 9A.
What is the back electromagnetic field (emf) in this motor under those conditions?If the motor is prevented from turning, what would be the current drawn?How much more heat would be generated in the coils in that situation?
Light of wavelength 589 nm is incident on a single slit that is 0.720mm wide, and the resulting diffraction pattern is observed on a screen 2.00m away. What is the distance between the two dark fringes on either side of the central bright fringe
An astronaut's normal weight it 600 newtons. How much would she weigh while orbiting in a satellite at 12,000 kilometers [two earth radii] above the surface of Earth.
The pressure inside a bottle of champagne is 4.34 atm higher than the air pressure outside. The neck of the bottle has an inner radius of 1.10 cm. What is the frictional force on the cork due to the neck of the bottle?
5 mol of an ideal gas expands isothermally at 373 K to 1.2 its initial volume. Find the heat flow into the system. The universal gas constant is 8.31 J/K · mol
A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. find the distance (in m) between the cliffs
The sound travels through the left tube LXM, which has a fixed length. Concurrently, the sound travels through the right tube LYM, length of which can be changed by moving the sliding section
The intensity of the sunlight that reaches Earth's upper atmosphere is approximately 1410 W/m2. What is the average energy density
A car starts at a position of x=2km and has a speed of 1 mph. After 56 s thecar has a speed of 44 mph. Determine the magnitude of the car's average acceleration during this time.
A window air conditioner uses 1392 W of electricity and has a coefficient of performance of 2.47. How much work will be done by the air conditioner during the process of cooling the room
Two cars a and b are travelling in the equal direction with velocities A and B(A>B). While the car a is at a distance behind car b, the drive of car a applies break producing uniform retardation r, there will b no collision while.
Over the next several weeks, Frank never saw any of the industry's logo items being worn or used by the workers. Instead the workers were uncommunicative towards him and at times even hostile
A certain puddle of water has 1025 identical water molecules. As the temperature of this puddle falls to 0°C and below, the puddle freezes, resulting in a considerable change in the thermodynamic properties of this system.
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