The rings of Saturn consist primarily of ________.
A. methane and ammonia
B. water ice
C. hydrogen and helium
D. silicate rocks
Answer: B
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Atomic nuclei of almost all elements consist of
a. only neutrons b. protons and electrons c. neutrons and electrons d. only protons e. protons and neutrons
Calculate the current through a 10.0-m long 22 gauge (having radius 0.321 mm) nichrome wire if it is connected to a 12.0-V battery. The resistivity of nichrome is 100 × 10-8 ? ? m
A) 17.5 A B) 30.9 A C) 61.8 A D) 388 mA E) 776 mA
Different units can be used to measure the same physical quantity, differing only by some multiplicative factor. The cgs unit for magnetic field, the gauss, is equal to ________ tesla
a. 104 b. 10–4 c. 0.5 d. These units do not measure the same physical quantity.
Projectile Motion: A stone is thrown horizontally with an initial speed of 10 m/s from the edge of a cliff. A stopwatch measures the stone's trajectory time from the top of the cliff to the bottom to be 4.3 s. What is the height of the cliff if air resistance is negligibly small?
A. 22 m B. 43 m C. 77 m D. 91 m