An electricity company wants to reduce wasted energy across a town. For the same amount of money, they can either: Use 20% of the wasted
energy from the power station to heat their offices. Install new power
lines which only waste half the energy of the old ones. Replace all the
bulbs in the town with LED bulbs, which are 99% efficient. Explain which of
these things they should do.

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.

What is a possible result of higher air temperature caused by global warming

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?