During a bench press exercise, a person applied 600 N of force to a barbell for 5 seconds, but they were unable to push the bar up off their chest (the bar did not change position). How much work did that person do on the bar?

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.

If vx = 7.00 units and vy = -7.60 units, determine the magnitude of v⃗ . determine the direction of v⃗ .

Could we see a galaxy that is 20 billion light-years away?