Over geological time periods, the Earth's climate has been
A) relatively stable
B) continuously unstable
C) constant and unchanging
D) gradually becoming more unstable
A
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What is the symbol for the element whose atoms have 3 protons each?
a. Mn b. Li c. Sr d. Li e. Cm
Uncertainty Principle Using Momentum and Position: Suppose that the speed of an electron traveling 2.0 km/s is known to an accuracy of 1 part in 105 (i.e., within 0.0010%). What is the least possible uncertainty within which we can determine the position of this electron? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A. 2.0 mm B. 5.8 mm C. 14 mm D. 14 cm E. 8.5 nm
Astronauts in orbit are weightless or nearly weightless. explain your answer.
What will be an ideal response?
(a) What is the frequency of an EM wave that has a wavelength of 1 millimeter? (b) What type of EM wave is this?