How is the direction of a magnetic field defined?
The direction of a magnetic field is the direction the north seeking pole of a compass
tends to point when placed in the field.
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Planetesimals beyond the orbit of _____ failed to accumulate into a protoplanet because the gravitational field of _____ continuously disturbed their motion
a. Neptune; Uranus b. Jupiter; Mars c. Earth; Saturn d. Mars; Earth e. Mars; Jupiter
If an electric toaster rated at 110 V is accidently plugged into a 220-V outlet, the current drawn by the toaster will be
A) half its normal value. B) the same as its normal value. C) twice its normal value. D) none of the above
A golf ball hits a wall and bounces back at 3/4 the original speed. What part of the original kinetic energy of the ball did it lose in the collision?
a. 1/4 b. 3/8 c. 7/16 d. 9/16 e. 3/4
The present atmospheres of the terrestrial planets probably originated from their internal activity.
Answer the following statement true (T) or false (F)