The surface of Venus is hotter than the surface of Mercury
a. True
b. False
Indicate whether the statement is true or false
True
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Radioactivity Basics: The nuclei of 
He are also known as
A. ? particles. B. ? particles. C. ? rays. D. x-rays. E. positrons.
Strain-hardening in metals is due to
(a) A reduction in dislocation density due to dislocations running out of the crystals (b) The creation of immobile dislocations by dislocation reactions (c) A reduction in dislocation density by dislocation annihilation (d) Foreign atoms pinning dislocations
A 12-g bullet moving horizontally strikes and remains in a 3.0-kg block initially at rest on the edge of a table. The block, which is initially 80 cm above the floor, strikes the floor a horizontal distance of 120 cm from its initial position. What was the initial speed of the bullet?
a. 0.68 km/s b. 0.75 km/s c. 0.81 km/s d. 0.87 km/s e. 0.41 km/s
The ionic bond forms because the atoms involved
A) are naturally ions. B) have spherically symmetric charge distributions. C) are the same. D) all of the above E) none of the above