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The motor in a toy car operates on 6.00 V, developing a 4.60 V back emf at normal speed. If it draws 3.00 A at normal speed, what current does it draw when starting?
What is the wavelength for sounds of 20 Hz and 20 kHz in air? (Use 343 m/s for the speed of sound in air). How many times does your ear-drum vibate back and forth per second for each of these sounds?
Find what is the change in entropy of 80 gram of steam at 100oC, when it is condensed to water at 100oC
A 2.2 kilogram steel block is at rest on a steel table. A horizontal string pulls on the block. Find the minimum string tension needed to move the block
After hitting the wall, the ball is moving to the left at -28 i m/s. If the collision lasts .15s, what was the horizontal force exerted by the wall on the ball during impact
A Michelson interferometer is illuminated with monochromatic light. Evaluate the wavelength of the light
Consider an LR circuit with a variable inductor and with deltaVs=150 V, f=60Hz, R=5 ohms. Calculate the power in the resistor
One cubic meter of water flowing over Niagara Falls in New York drops 98.1 meters. how much heat energy would the water have
A Dodge car of mass 1103 kg traveling to the right at 22.40 m/s collides head-on with a Ford of mass 1258 kg traveling at the same speed but in the opposite direction. Calculate its final speed the moment after the collision
A sinusoidal electromagnetic wave having a magnetic field of amplitude 1.25\mu {\rm T} and a wavelength of 432{\rm nm} is traveling in the + x direction through empty space. What is the amplitude of the associated electric field
Determine the temperature at which the resistance of atungstenwire will bethree timesits value at 20°C. Assume its coefficient of resistivity remains constant.
An outdoor circular fish pond has a diameter of 4.00 m and a uniform full depth of 1.40m. How far away from the edge of the pond is the person
Two conductors having net charges of +17.0 µC and -17.0 µC have a potential difference of 17.0 V between them. What is the potential difference between the two conductors
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