An ideal transformer has 200 turns on its primary and 12 turns on its secondary. If the power input to the transformer is 120 kW, what is the power output?
A. 0.600 kW
B. 7.20 kW
C. 10.0 kW
D. 120 kW
E. 240 kW
D. 120 kW
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Where the optic nerve penetrates the eye
A. Astigmatism |
B. Eye Dominance |
C. Focus |
D. Blind Spot |
E. Color Blindness |
F. Afterimages |
Which is more dangerous, touching a faulty 110-volt light fixture, or a Van de Graaff generator charged to 100,000 volts?
A) touching the light fixture B) touching the generator C) touching both are about equally dangerous.
A 1.5-kg playground ball is moving with a velocity of 3.0 m/s directed 30° below the horizontal just before it strikes a horizontal surface. The ball leaves this surface 0.50 s later with a velocity of 2.0 m/s directed 60° above the horizontal. What is the magnitude of the average resultant force on the ball?
a. 14 N b. 11 N c. 18 N d. 22 N e. 3.0 N
If a satellite travels at constant speed at all points in its orbit, then its path is
1) a circle. 2) an ellipse. 3) a parabola. It travels at constant speed because 4) the net force acting on the satellite is zero. 5) it is characteristic for a satellite to travel at constant speed in this type of orbit. 6) gravitational force decreases with increasing distance. 7) there is no component of gravitational pull directed along the satellite's path. 8) of inertia.