The type of mirror that will allow you to see large areas normally hidden from your view is
a. concave
b. convex
c. plane
d. half-silvered
e. polaroid
B
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A car has a mass of 1000 kg and accelerates at 2 m/s2. What net force is exerted on the car?
A) 500 N B) 1000 N C) 1500 N D) 2000 N E) none of these
Which of the following statements about brown dwarfs is not true?
A) Brown dwarfs are supported against gravity by degeneracy pressure, which does not depend on the object's temperature. B) Brown dwarfs eventually collapse to become white dwarfs. C) All brown dwarfs have masses less than about 8% that of our Sun. D) Brown dwarfs form like ordinary stars but are too small to sustain nuclear fusion in their cores.
If the maximum E-component of an electromagnetic wave is 600 V/m, what is the maximum B-component?
a. 1.4 T b. 1.8 × 10^?5 T c. 2.0 × 10^?6 T d. 1.0 × 10^?3 T e. 1.6 × 10^?10 T
The most common mineral in Earth's crust is ________, and the second most common mineral is ________
A) quartz; feldspar B) feldspar; quartz C) silicate; carbonate D) olivine; feldspar