An 18 mm wide diffraction grating has rulings of 710 lines per mm. Light is incident normally on the grating. Monochromatic light of 506 nm wavelength is used. The largest angle from the normal at which an intensity maximum is formed is closest to:
A) 46°
B) 44°
C) 42°
D) 40°
E) 38°
A
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The composition of Earth's atmosphere has not changed since its formation.
Answer the following statement true (T) or false (F)
A pattern of vibration that simulates a wave that is standing still:
a) Interference b) Standing wave c) Reflection d) Diffraction
According to our modern science, which of the following best explains why the vast majority of the mass of our solar system consists of hydrogen and helium gas?
A) Hydrogen and helium are the most common elements throughout the universe, because they were the only elements present when the universe was young. B) Hydrogen and helium are produced in stars by nuclear fusion. C) All the other elements escaped from the solar nebula before the Sun and planets formed. D) All the other elements were swept out of the solar system by the solar wind.
A solid wood door, 90.0 cm wide by 2.00 m tall has a mass of 35.0 kg. It is ajar and at rest. A ball with a mass of 500 g is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side
The ball rebounds with a speed of 16.0 m/s along the same line. How much energy is lost in the process? A) 29.8 J B) 16.3 J C) 14.9 J D) 12.7 J E) 4.79 J