Which is not a fundamental particle?
A) photon
B) nucleus
C) lepton
D) up quark
E) electron
Ans: B) nucleus
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Is the scientific method a hypothesis? How do you know?
What will be an ideal response?
Earth possesses few visible craters and the Moon possesses many. This is because
a. Earth formed later than the Moon and, therefore hasn't encountered as many meteoroids. b. the Moon doesn't have an atmosphere that could burn up many of the meteorites before impacting. c. erosion and plate tectonics have slowly removed evidence of past cratering on Earth. d. Earth formed later than the Moon and, therefore hasn't encountered as many meteoroids; the Moon doesn't have an atmosphere that could burn up many of the meteorites before impacting; and erosion and plate tectonics have slowly removed evidence of past cratering on Earth. e. the Moon doesn't have an atmosphere that could burn up many of the meteorites before impacting and erosion and plate tectonics have slowly removed evidence of past cratering on Earth.
Magnetic Field of a Current Loop: What is the strength of the magnetic field at the center of a circular loop of wire of diameter 8.0 cm when a current of 2.0 A flows in the wire? (?0 = 4? × 10-7 T ? m/A)
Fill in the blank(s) with the appropriate word(s).
Which formula is dimensionally consistent with an expression yielding a value for velocity? (a is acceleration, x is distance, and t is time)
a. v/t2 b. vx2 c. v2/t d. at