A satellite is powered by a small nuclear generator that puts out 10 W. How much matter is converted into energy over the 20-year life span of the generator?
a. 70 µg
b. 70 g
c. 7 g
d. 7 kg
e. 4 mg
a
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Waves travel along a 100-m length of string with a mass of 55 g, which is held taut by a tension of 75 N. What is the speed of the waves?
A) 3700 m/s B) 370 m/s C) 37 m/s D) 0.37 m/s E) 3.7 m/s
The more massive a star is, the longer it lives because it has more hydrogen to fuse into helium.
Answer the following statement true (T) or false (F)
The ground state electronic configuration for silicon is 1s22s22p63s23p2 . Which of the following elements would be expected to be chemically similar to silicon?
a. boron with configuration 1s22s22p1 b. lithium with configuration 1s22s1 c. carbon with configuration 1s22s22p2 d. sodium with configuration 1s22s22p63s1
What happens on or about March 20th, and what does the name signify?
What will be an ideal response?