Why does atmospheric pressure decrease as you go higher in altitude on earth?

Some of the substances commonly used in stomach antacids are $\mathrm{MgO}, \mathrm{Mg}(\mathrm{OH})_{2},$ and $\mathrm{Al}(\mathrm{OH})_{3}.$ Which of these substances will neutralize the greatest amount of 0.10 M HCl per gram?

You are a member of
a The health team and the nursing team
b The health team and the medical team
c The nursing team and the medical team
d The board of trustees

You observe a full moon rising at sunset. What will you see at midnight?

A student was given two metal cubes that looked similar. One was $1.05$ cm on an edge and had a mass of $14.32$ grams; the other was $2.66$ cm on a side and had a mass of $215.3$ grams. How can the student determine if these two cubes of metal are the same material using only the data given?

A carousel has 7 horses and one bench seat that will hold two people. One of the horses does not move up or down. If 6 of the 9 people randomly filling the carousel are under the age of 8 , what is the probability that a person under the age of 8 will end up on the one horse that does not move up or down?

You select a card at random from those below. Without replacing the card, you choose a second card. Find each probability. Consider $Y$ to be a vowel.

$P$ (vowel then vowel)

What upward gravitational force does a 5600 kilogram elephant exert on Earth?

Applying Ideas How would seasons be different if Earth was not tilted on its axis?

The gravitational constant, G, near the Moon is different than $G$ near Earth.

The following information was available for the year ended December 31, 2013:

Required: c. Calculate the price/earnings ratio for 2013.

Light from the Sun takes approximately $8.3 \mathrm{~min}$ to reach the Earth. During this time interval the Earth has continued to rotate on its axis. How far is the actual direction of the Sun from its image in the sky?

Scientists think that Earth once had naturally existing plutonium-$239$. Suppose Earth had $10$ trillion tons of $\mathrm{Pu}-239$ when it formed. Given plutonium's half-life of $24,000$ years and Earth's current age of $4.6$ billion years, how much would remain today? Use your answer to explain why plutonium is not found naturally on Earth today.

What factors determine the voltage gain of a common-source FET amplifier?