When a diffraction grating having 5000 lines/cmis illuminated by monochromatic light, the angle between the central maximum and the fourth order maximum is 47.2°. What is the wavelength of the light?
A) 367 nm B) 183 nm C) 138 nm D) 637 nm
A
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A box weighing 77.0 N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end. Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley weighs 30.0 N.
Temperature Scales: What is absolute zero on the (a) Celsius scale and (b) on the Fahrenheit scale?
What will be an ideal response?
The redshift due to the Doppler effect is caused by
A) sources of light moving toward the Solar System. B) sources of light moving away from the Solar System. C) sources of light obscured by interstellar dust. D) sources of light moving at right angles to the Solar System. E) an effect not yet believed to be understood.
During the nuclear fusion of hydrogen to helium in the core of our Sun, what percentage of the original mass of the hydrogen is converted into energy?
A) 0.7% B) 0.07% C) 70% D) 100%