5) A sample of helium has a volume of 521 dm3 at a pressure of 75 cm Hg
and a temperature of 18° C. When the temperature is increased to 23°
C, what is the volume of the helium?
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Two friends are having a conversation. anna says a satellite in orbit is in freefall because the satellite keeps falling toward earth. tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . who do you agree with and why?

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?