The nuclear fusion that occurs in the Sun's core causes the total mass of the Sun to decrease in time.
Answer the following statement true (T) or false (F)
True
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A diffraction grating is to be used to find the wavelength of the emission spectrum of a gas. The grating spacing is not known, but light of a known wavelength of 632.8 nm is deflected by 43.2° in the second order by this grating
Light of the wavelength to be measured is deflected by 34.9° in the second order. What is the wavelength of the light that is to be measured?
The figure below shows the orbit of a comet about the sun. The comet has the greatest velocity when traveling
A. from A to B.
B. from B to C.
C. from C to D.
D. from D to E.
Which is not an example of approximate simple harmonic motion?
a. A ball bouncing on the floor. b. A child swinging on a swing. c. A piano string that has been struck. d. A car's radio antenna as it waves back and forth.
A rock is thrown at some angle above the horizontal with a certain velocity. It reaches its highest point and starts falling down. What is the velocity of the rock at the highest point of its trajectory?
A) 0 B) 9.8 m/s C) It is equal to its initial horizontal velocity. D) It is equal to its initial vertical velocity. E) It is equal to its initial velocity.