Roughly how many different elements are there?
A) 1000
B) 20
C) many more than 1000
D) 100
E) 4
D
You might also like to view...
What fraction of the total energy density in a cavity filled with black body radiation at 5000 K is in the range 5.80 × 1014 Hz and 5.85 × 1014 Hz?
A) 5% B) 10% C) 1.5% D) 1% E) 25%
Entropy is a measure of the _____ of a system
a. disorder c. heat b. temperature d. internal energy
Notice the numbered points on this diagram of a reflecting telescope. Which point represents the place where the starlight is in focus?
A) Point 1 B) Point 2 C) Point 3 D) None of the listed choices is correct. This telescope has no focus because there is a hole in the primary mirror.
Describe some of the features of Mercury's surface and briefly explain how these features are believed to have formed
What will be an ideal response?