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Gala2k [10]
3 years ago
15

Among the alkali earth metals, the tendency to react with other substances

Physics
2 answers:
kati45 [8]3 years ago
5 0
Answer is D hope this helps  



padilas [110]3 years ago
4 0
Answer D
In alkali earth metals reacrivity increases from top to bottom (opposite of b)
This is because as you go down, the electron shells increase by 1 shell. The farther away a shell is from the nucleus, the higher its tendency to react.
D is true because the more reactive an alkali metal is, the more vigorous the reaction will be with water.
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At higher elevations, the boiling point of water decreases, due to the decrease in atmospheric pressure. As a result, what
Effectus [21]

Answer:

The correct answer is option b. At higher elevations, it would take longer to hard boil an egg, because there is a lower boiling.

Explanation:

When we boil water at a very high temperature, it turns out that the water boils much faster. This is because the higher we are, <u>there will be less oxygen and less pressure in the atmosphere</u>. This implies that the water vapor becomes steam much faster than as it happens at low temperatures, so less heat will be needed for the water to boil.

That is why <u>if we want to cook an egg, we will have to lower the heat</u> of the kitchen when we put it on the fire, in order to avoid boiling water very quickly. Lowering the heat, <u>then cooking the egg will take much longer. </u>

Given this data, the correct answer is option B, At higher elevations, it would take longer to hard boil an egg, because there is a lower boiling.

8 0
4 years ago
1. What is the most common type of distribution? How does this distribution<br> benefit the species?
timurjin [86]

Answer:

Clumped distribution is the most common type of dispersion found in nature. In clumped distribution, the distance between neighboring individuals is minimized.

6 0
3 years ago
Read 2 more answers
What would be the effect of the uneven distribution of
Marianna [84]
The equator would be warmer than the poles. :)
4 0
3 years ago
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If the air starts at a pressure of 1.0 atm, and you hold the volume of your lungs constant (a good approximation) and the number
Misha Larkins [42]

Answer:

the question is incomplete, here is the complete question.

"On a chilly 12∘C day, you quickly take a deep breath--all your lungs can hold, 4.0 L. The air warms to your body temperature of 37∘C.If the air starts at a pressure of 1.0 atm, and you hold the volume of your lungs constant (a good approximation) and the number of molecules in your lungs stays constant as well (also a good approximation), what is the increase in pressure inside your lungs?

1.09 atm

Explanation:

the question addresses an ideal gas. where the relationship between the volume(v),pressure(p),temperature(T) and nos of molecules(n) is expressed as

PV=nRT\\

Where R us the ideal gas constant.

From the question,the number of molecules,volume are constant, we can now re-write the equation as

       P=KT\\

where pressure and temperature are the only varying parameters.

if we vary the constant K we arrive at

\frac{P_{1} }{T_{1}}=\frac{P_{1} }{T_{1}}=...=\frac{P_{n} }{T_{N}}\\

since  the Temprature must be in absolute temperature, we add 273k to it Celsius value.

T_{1} =12+273=285k\\T_{2} =37+273=310k\\P_{1} =1 atm\\

Substituting value into the generated equation, we have

P_{2}=\frac{310*1}{285} \\P_{2}=1.09 atm.\\

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3 years ago
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Answer:

A. 1 J= 1 kg•m²/s²      :)

Explanation:

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