A diffraction grating has 6.00 × 103 lines per centimeter ruled on it
What is the angular separation between the second and the third orders on the same side of the central order when the grating is illuminated with a beam of light of wavelength 550 nm? A) 20.5°
B) 30.5°
C) 40.6°
D) 50.5°
C
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As long as an object is not gaining or losing mass, a net force on the object will cause a change in
A) acceleration. B) direction. C) weight. D) speed. E) velocity.
The "oxygen crisis" occurred around
A) 2 billion years ago B) 3.5 billion years ago C) 2.5 billion years ago D) 4 billion years ago
The ________ was a particle predicted to exist long before it was observed because energy is not conserved in beta decays without it.
What will be an ideal response?
The bottom of a flat–bottomed aluminum boat has an area of 4.0 m2, and the boat's mass is 120 kg. When set afloat in water, how far below the water surface is the boat bottom? (water density = 1.0 × 10^3 kg/m3)
a. 0.060 m c. 0.030 m b. 0.015 m d. 0.075 m