Motional Emf: As shown in the figure, one end of a metal bar is in contact with a circular rail and the other end is pivoted at P. A steady uniform, magnetic field B into the page is present. As the bar rotates about point P in a clockwise direction, the direction of the induced current through the resistor R is
A. from a to b.
B. from b to a.
C. No current is induced.
Answer: B
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If a neutron star attains a mass over ________ solar masses it becomes a black hole
Fill in the blank(s) with correct word
If the Earth didn't have an atmosphere what would happen to its temperature?
a. It would go up. b. It would go down. c. It wouldn’t change.
If a 10°C piece of iron is heated until it has twice as much internal energy, its temperature will be
A) 20°C. B) 273°C. C) 293°C. D) 566°C. E) none of the above
The amino acid lysine is shown below. What functional group must be removed in order to produce cadaverine (1,5-pentanediamine)?
A) One amino group must be removed and replaced with a hydrogen. B) The carboxyl group must be removed and replaced with a hydrogen. C) The hydrogen (shown) must be removed and replaced with an amino (NH2) group. D) Lysine is 1, 5-pentanediamine. Nothing has to be removed.