Physics, 12.06.2021 02:40, mommer2019

Sam runs 9 kilometers in 2.5 hours. What is his speed?

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Physics, 22.06.2019 01:30, markmeinberg

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

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Physics, 22.06.2019 03:30, Bryanguzman2004

Two polarizers are oriented at 24.0∘ to one another. light polarized at a 12.0-degree angle to each polarizer passes through both. what is the transmitted intensity (%)?

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Physics, 22.06.2019 14:30, abbz13

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.

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Physics, 22.06.2019 16:50, anaismami1

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.