Which of the following statements about nuclear reactions is most true?
correct answer is c.
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A hot air balloon has a volume of 2.00 × 103 m3 when fully inflated, and the air inside the balloon is always at atmospheric pressure of 1.01 × 105 Pa
because of the large opening used to fill the balloon and heat the air inside it. What is the mass of hot air inside the balloon if its temperature is 120°C? The universal gas constant is 8.314 J/mol•K. (Assume a molecular weight of 28.8 g/mol for air.) A) 1780 kg B) 5850 kg C) 203 kg D) 62.0 kg
The upward force exerted by a fluid on an object immersed in it is called the buoyant pressure
Indicate whether the statement is true or false
What do astronomers mean when they refer to "gaps" in the asteroid belt between Mars and Jupiter?
A) There is a large population of asteroids too faint to see called the "gap" asteroids. B) Asteroids seem to avoid certain orbits around the Sun, creating "gaps" in the orbits that asteroids can have. C) Asteroids typically cluster together and this creates "gaps" on the sky. D) There are either pure metal or pure rock asteroids, but no mixtures. Thus there is a "gap" in the composition of asteroids. E) There are very few asteroids with diameters between 1 and 100 kilometers, creating a "gap" in the size distribution.
Ideal metals form close-packed crystal structures because the positive ______________cores pack like spherical billiard balls.
Fill in the blank(s) with the appropriate word(s).