A heavy weight is supported by two cables that exert tensions of magnitude
and 
. Which statement is correct?
?
?
a..
b.
c.
d.
e.
We need the mass of the box in order to determine the correct answer.
c
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The speed of a wave is the same as the speed of the particles displaced by the wave
a. True b. False Indicate whether the statement is true or false
Do you think it is possible that a red supergiant could harbor an advanced civilization? Explain your reasoning
What will be an ideal response?
Which law of thermodynamics addresses the direction of heat flow?
A) First law B) Second law C) Third law D) all of the above
Three galaxies, each of mass m = 4.0 × 10^41 kg, lie in a plane at the corners of an equilateral triangle with sides of 5.0 × 10^22 m length. The magnitude of the force the other two galaxies exert on each galaxy is
a. 4.3 × 10^27 N. b. 6.4 × 10^27 N. c. 7.4 × 10^27 N. d. 8.6 × 10^27 N. e. 4.3 × 10^28 N.