Which of the following gases was present in the smallest amounts in early atmosphere of the Earth?
A) hydrogen (H2)
B) nitrogen (N2)
C) carbon dioxide (CO2)
D) oxygen (O2)
D
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A mixture of red and green pigments appears
A) orange. B) yellow. C) magenta. D) blue. E) muddy-brown.
In a room where g = 9.81 m/s2, a hockey puck slides off the edge of a platform with an initial velocity of 28.0 m/s horizontally. The height of the platform above the ground is 2.00 m
What is the speed of the puck just before it hits the ground? The air resistance is negligibly small. A) 28.7 m/s B) 6.26 m/s C) 28.0 m/s D) 48.2 m/s E) 26.3 m/s
Lenz's Law: A circular coil lies flat on a horizontal surface. A bar magnet is held fixed above the center of the coil with its north pole pointing downward. What is the direction of the induced current in the coil, as viewed from above?
A. clockwise B. counterclockwise C. There is no current in the coil.
Where did the Big Bang occur?
What will be an ideal response?