Pz answer only if you know 15 points
the centripetal force on an object in uniform circular motion is calculated using which formula?

fnet = mac

fnet = 1/2act2

fnet = (vi2sin2θ0)/g

fnet = (4π2r)/t2(incorrect)

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

The slope of a velocity time graph over any interval of time gives the during that interval

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.