In a binary system, the most massive star:
A) shows a large Doppler shift.
B) is farthest from the balance point of the system.
C) follows the largest orbit.
D) is closer to the center of mass.
D
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As white light passes through a prism, the red (longer) wavelengths bend less than the blue (shorter) wavelengths, so forming the rainbow of colors
Indicate whether the statement is true or false
An object falls freely from a height, H. It is released at t = 0 and strikes the ground at t = T. Consider the time at which the object is at a height of H/2. Also consider the height at which the object is located at the time T/2. Which of the following is true?
1.When the object is at a height H/2, the time is less than T/2 and when the time is T/2, the object is at a height of less than H/2. 2.One cannot tell which of these choices may be true from the given information. 3.When the object is at a height of H/2, the time is equal to T/2. 4.When the object is at a height H/2, the time is greater than T/2 and when the time is T/2, the object is at a height of more than H/2.
Which of the following statements is most true?
Two identical objects are placed in a room with a temperature of 20°C. Object A has a temperature of 50°C, while object B has a temperature of 90°C. What is the ratio of the net power emitted by object B to the power emitted by object A?
A) 21 B) 1.7 C) 81 D) 2.8 E) 17