Scientists hypothesize that oxygen began to accumulate in earth's atmosphere of living things with the ability to?

Amother used 150 watts of power to raise a 15 newton object in a time interval of 8.0 seconds. through what vertical distance was the object raised ?

Preciso de ajuda na parte de termometria e tenho prova amanhã ajuda ae prf

What would occur if the index of refraction of a material was less than n=1? the speed of light would increase to a speed larger than the maximum speed of light in a vacuum. the light wave would not bend at all though the material. the light wave would not be able to refract and would instead reflect off of the material. the speed of light would reduce to values close to 0 m/s.