The three laws of planetary motion by ________ allowed us to predict planetary motion
Fill in the blank(s) with correct word
Kepler
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A person who weighs 550 N empties her lungs as much as possible and is then completely immersed in water (of density 1000 kg/m3 ) while suspended from a harness. Her apparent weight is now 21.2 N. What is her density?
A) 1040 kg/m3 B) 1030 kg/m3 C) 1050 kg/m3 D) 56.1 kg/m3 E) 960 kg/m3
Charge of uniform linear density 6.0 nC/m is distributed along the x axis from x = 0 to x = +3 m. Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point y = +4 m on the y axis?
A.
B.
C.
D.
E.
What conclusion can we draw about the motion of a star that does not show any Doppler shift in its spectrum?
A. The star does not have a magnetic field. B. The star may be moving perpendicular to our line of sight. C. The star is spinning fast. D. The star is not moving. E. We cannot draw any conclusions about the motion of this star.
For the multiplication of 6.3 m divided by 2.8 m, the result should be reported with how many significant figures?
a. Two b. One c. Three d. Four e. Seven