A straight 1.0-m long wire is carrying a current. The wire is placed perpendicular to a magnetic field of strength 0.20 T
If the wire experiences a force of 0.60 N, what is the current in the wire?
A) 2.0 A
B) 1.0 A
C) 3.0 A
D) 4.0 A
E) 5.0 A
C
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The orbits of population I stars I. are confined to disk of the galaxy. II. are very elliptical. III. are nearly circular. IV. are randomly inclined to the disk of the galaxy
a. I b. IV c. I & IV d. II & IV e. I & III
You look at yourself in a plane mirror. If you move away from the mirror and look at yourself again, you now see
a. more of yourself. b. less of yourself. c. the same amount of yourself. d. a larger image of yourself. e. a smaller image of yourself.
Venus has larger volcanoes than Earth's Hawaii
Indicate whether the statement is true or false
The top panorama shows our view of the Milky Way in all directions as it appears in visible light. The bottom panorama shows the same view, but in a different wavelength of light. What wavelength band are we seeing in the bottom photo, and how do you know?
A) infrared light, because the dust that appears dark in the visible light photo glows in infrared light B) x-ray light, because only x-rays allow us to see through the disk of our galaxy C) radio waves, because clouds of gas in the disk of our galaxy appear pinkish when we look at them with radio telescopes D) infrared light, because clouds of gas and dust appear pinkish when we look at them with infrared telescopes