A 2.5-kg object suspended from the ceiling by a string that has a length of 2.5 m is released from rest with the string 40° below the horizontal position. What is the tension in the string at the instant when the object passes through its lowest position?
a. 11 N
b. 25 N
c. 42 N
d. 18 N
e. 32 N
C
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1.65 billion is the same as
a. 1.65 × 10^12. b. 1.65 × 10^9. c. 1.65 × 10^6. d. 1.65 × 10^5. e. 1.65 × 10^3.
Tycho Brahe's extremely accurate measurements of the planetary positions showed that
A) Kepler's theory was wrong. B) both Ptolemy's theory and Copernicus's theory were correct. C) both Ptolemy's theory and Copernicus's theory were wrong. D) Copernicus's theory was wrong and Ptolemy's was correct. E) Ptolemy's theory was wrong and Copernicus's theory was correct.
Different colors correspond to electromagnetic waves of different
A) frequencies. B) speeds. C) amplitudes. D) weights. E) intensities.
The siphon shown is used to transfer liquid from a higher level to a lower level. If the fluid is drawn up and is continuous through the tube, determine the velocity of flow of gasoline if the vertical distance from the liquid surface to the outlet is 1.0 m
a.
1.1 m/s
b.
2.2 m/s
c.
4.4 m/s
d.
9.8 m/s
e.
6.5 m/s