Which of the following is a claim of special relativity? a. all laws of physics apply to frames of reference that start from rest. b. all laws of physics apply to frames of reference that are changing speed. c. all laws of physics apply to frames of reference that are not accelerating. d. all laws of physics apply to frames of reference that are accelerating.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j ?

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little