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The 1400-turn coil in a dc motor has an area per turn of 1.1 multiply.gif 10-2 m2. The design for the motor specifies that the magnitude of the maximum torque is 5.8 N · m when the coil is placed in a 0.16 T magnetic field. What is the current in the coil?
Electromagnets that produce large magentic fields use water cooling to prevent excessive heating of the magnet's coils. How many liters of water must circulate by the coils each second if the temperature of the coils is not to exceed 49°C
A 70.0 kg football player leaps straight up into the air (with no horizontal velocity) to catch a pass. If the ball was moving horizontally when it was caught, how fast was the ball travelling
A particle with a charge of ?1.0 ?C and a mass of 2.4 10-6 kg is released from rest at point A and accelerates toward point B, What is the potential difference VB ? VA between A and B
A spelunker is surveying a cave. He follows a passage that goes 181 m straight west, Use a scale drawing to determine the fourth displacement
A school bus takes 0.89 h to reach the school from your house. If an average velocity of the bus is 21.1 km/h to the east, what is the displacement.
We can reasonably model a 90-W incandescent lightbulb as a sphere 5.5cm in diameter. find the visible light intensity at the surface of the bulb
A 73 trampoline artist jumps vertically upward from the top of a platform with a speed of 4.0. If the trampoline behaves like a spring of spring constant 6.2×104, how far does he depress it.
A small ball rolls horizontally off the edge of a tabletop that is 1.06 m high. how long was the ball in the air
Briefly describe: (a) Charging by friction (b) Charging by contact (c) Charging by induction *In one sentence if possible.
A block of mass m is attached to a string that is wrapped around the circumference of a wheel of radius R and moment of inertia I. Find the moment of inertia of the wheel if its radius is 8.0 cm
Certain criteria have been met which suggest that an intangible asset has been created. Illustrate w hat amount should be recognized as research and development expense in 2011 using U.S. GAAP?
implies a serious limit to such detection. (Note also that the uncertainty is greater if there is an uncertainty in the propagation speeds of the S- and P-waves).
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