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Say the electrical company needs to step down the voltage from 7200V RMS in the power line behind your house to the required 120V RMS. If they have a transformer with 1000 coil loops on the primary side, how many loops must be on the secondary side?
Penalty factor 0.1
three point charges are on the x axis q1 6 micro coulomb at x 0 q2 4 micro coulomb at x 2 m and q3 -1.5 micro
In photo like the Hubble Deep Field, we see galaxies in many different stages of their lives. In general, which galaxies are seen in the earliest (youngest) stages of their lives.
A Carnot engine performs work at the rate of 480 kW while using 760 kcal of heat per second. If the temperature of the heat source is 571°C, at what temperature (in Celsius) is the waste heat exhausted
An aircraft?starts at rest and is accelerated?at 13.2?m/s2 for 8.5 seconds, at which time the aircraft launches. What is the distance traveled from the starting point
A large wheel is coupled to a wheel with half the diameter. How does the rotational speed of the smaller wheel compare with that of larger wheel? How do the tangential speeds at the rims compare (assuming the belt doesn't slip).
A car approaches you at a constant speed, sounding its horn, and you hear a frequency of 76 Hz. What is the frequency o the sound emitted by the horn
The nucleus of an atom is on the order of 10-15 m in diameter. For an electron to be confined to a nucleus, What would be the kinetic energy of an electron confined to this region
A radio antenna broadcasts a 1.0 MHz radio wave with 29kW of power. What is the wave's intensity 33km from the antenna
A generator rotates at 88Hz in a magnetic field of 2.6×10?2T . It has 1200 turns and produces an rms voltage of 120V and an rms current of 57.0A, What is the area of each turn of the coil
What must be the temperature of the cold reservoir in order to increase the efficiency to 29.0%
A quarterback claims that he can throw the football a horizontal distance of 183 m (200 yd). Furthermore, he claims he can do this by launching the ball at the relatively low angle of 30.0 degrees above the horizontal.
The cable lifting an elevator is wrapped around a 1.0-m-diameter cylinder that is turned by the elevator's motor. How long does it take for the elevator to stop
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