When a ferromagnetic material is placed in an external magnetic field, the net magnetic field of its magnetic domains becomes
A) smaller.
B) zero.
C) larger.
C
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In his experiment with rolling balls down a ramp at different ramp angles, what did Galileo discover?
a. For any fixed ramp angle, the speed of a ball was always constant, regardless of its weight. b. For any fixed ramp angle, the acceleration of a ball was always constant, regardless of its weight. c. For any fixed ramp angle, the velocity of a ball was always constant, regardless of weight. d. The velocity and acceleration were both constant. e. The heavier balls rolled down the ramp faster.
If we use the Doppler method to measure the period with which a star alternately moves toward and away from us due to an orbiting planet, then we also know the
A) orbital period of the planet. B) mass of the planet. C) distance to the star. D) radius of the planet.
Carnot Engine: An ideal Carnot engine has an efficiency of 83.0% and performs 4500 J of work every cycle. How much energy is discharged to the lower temperature reservoir every cycle?
A. 920 J B. 830 J C. 740 J D. 3700 J E. 5400 J
Lunar ________ are the result of ancient lava flows on the Moon
Fill in the blank(s) with correct word