__________is one of the small bodies that formed from the solar nebula and eventually grew into protoplanets
A) A planetesimal
B) The Oort cloud
C) The Orion nebula
D) A carbonaceous chondrite
A
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What current must be maintained in a square loop (50 cm on a side) to create a torque of 1.0 N ? m about an axis through its center and parallel to one of its sides when a magnetic field of magnitude 70 mT is directed at 40° to the plane of the loop?
A. 66 A B. 89 A C. 61 A D. 75 A E. 37 A
Which of the following statements does not use the term angular size or angular distance correctly?
A) The angular distance between those two houses in the distance is 30 degrees. B) The angular distance between those two bright stars in the sky is about 2 meters. C) The angular size of the Sun is about the same as that of the Moon. D) You can use your outstretched hand against the sky to estimate angular sizes and angular distances.
Five motion diagrams in which points represent the positions of an object at equal time intervals are shown below. Which statement is correct?
?
A. A has the greatest speed and the greatest acceleration. B. C has decreasing speed. C. D slows down and then speeds up. D. D speeds up and then slows down. E. E has a greater speed than A.
The Sun's observed spectrum is
A) a continuum with no lines, as shown by the rainbow. B) only emission lines on a black background. C) only absorption lines on a black background. D) a continuum with absorption lines. E) a continuum with emission lines.