Salmon often jump waterfalls to reach their breeding grounds.
Starting downstream, 3.18 m away from a
waterfall 0.294 m in height, at what minimum
speed must a salmon jumping at an angle of
45° leave the water to continue upstream?
The acceleration due to gravity is 9.81 m/s?.
Answer in units of m/s.

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.

Question 1 of 15 2 points when doing science as inquiry, you should have some idea of what you think the final result will be. o a. true o b. false submit

A200 g lead frying pan gains 2000 joules of heat. what is the change in temperature