The energy of a photon is ______________ proportional to its wavelength
Fill in the blank(s) with correct word
inversely
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Rotational Kinetic Energy: A small uniform disk and a small uniform sphere are released simultaneously at the top of a high inclined plane, and they roll down without slipping. Which one will reach the bottom first?
A. the one of smallest diameter B. the one of greatest mass C. the disk D. the sphere E. They will reach the bottom at the same time.
A 0.500-kg ball traveling horizontally on a frictionless surface approaches a very massive stone at 20.0 m/s perpendicular to wall and rebounds with 70.0% of its initial kinetic energy. What is the magnitude of the change in momentum of the stone?
A) 18.4 kg?m/s B) 14.0 kg?m/s C) 3.00 kg?m/s D) 1.63 kg?m/s E) 0.000 kg?m/s
The ozone layer is our friend because
A) it protects us from damaging ultraviolet radiation. B) it protects us from damaging infrared radiation. C) of the role it plays in keeping Earth warm. D) its electrical properties help to bend radio waves around the earth. E) it protects the earth from undergoing a harmful greenhouse effect.
If 4.0 J of work are performed in stretching an ideal spring with a spring constant of 2500 N/m, by what distance is the spring stretched?
A) 3.2 cm B) 3.2 m C) 0.3 cm D) 5.7 m E) 5.7 cm