40 POINTS!
Some kids are playing a game of marbles in which a large marble is flicked at smaller marbles to knock them out of a circle. Assuming that the collisions between the marbles are perfectly elastic, which of the following statements is true when a large marble collides with a smaller marble?
A. Both the kinetic energy and the momentum of the system are conserved.
B. Neither the kinetic energy nor the momentum of the system is conserved.
C. The momentum of the system is conserved, while the kinetic energy of the system is not conserved.
D. The kinetic energy of the system is conserved, while momentum is not conserved.
Answers: 1
Physics, 22.06.2019 16:50, JeroMii
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.
Answers: 2
Physics, 23.06.2019 02:00, raptortrainor2013
Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?
Answers: 3
40 POINTS!
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