Sandy takes a glass jar filled with clear paint and adds a few pinches of sand into it. She then uses a paint mixer to vigorously shake the jar, mixing the sand uniformly in it. When the jar is held to the light, the sand is evenly distributed throughout. What is this an illustration of?
A.
Hubble's Law
OB
a singularity
the Big Bang theory
O c.
OD
the cosmological principle
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Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

How many molecules are present in 3 mols of silicon dioxide (sio2)?

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.