What is the highest order maximum that is possible when using a grating with 600 slits per mm for a wavelength of 700 nm?
A. 1
B. 2
C. 3
D. 4
E. 5
B. 2
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Three resistors, each with resistance R1, are in series in a circuit. They are replaced by one equivalent resistor, R. Comparing this resistor to the first resistor of the initial circuit, which of the following is true?
a. The voltage across R equals the voltage across R1. b. The current through R equals the current through R1. c. The power given off by R equals the power given off by R1. d. R is less than R1.
A hypothesis that has been repeatedly and rigorously tested and supported is known as a:
a. model b. testable prediction c. scientific method d. scientific theory e. result
An atom of the element iron has an atomic number of 26 and an atomic weight of 56. If it is neutral, how many protons, neutrons, and electrons does it have?
A) 26 protons, 30 neutrons, 26 electrons B) 26 protons, 30 neutrons, 30 electrons C) 26 protons, 56 neutrons, 26 electrons D) 13 protons, 43 neutrons, 13 electrons E) 13 protons, 56 neutrons, 13 electrons
Electricity from a wall plug costs the consumer about
A. 1 ¢ per kilowatt-hour B. 10¢ per kilowatt-hour C. $1 per kilowatt-hour D. $1000 per kilowatt-hour