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2 years ago

How can we use rocks to determine how an area used to look in the past?

1 answer:

tatiyna2 years ago

8 0

<span>We can use rocks to determine if the animals from to day have changed from the past.
Rocks also help us know if rivers once flowed through an area.
We use them to find out what type of animals live then that are extinct now.</span>

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What happens to most of the energy as it moves throughout a food web?

ser-zykov [4K]

Answer: The energy decreases every time an organism consumes one another. the primary producers have the most energy, then it goes to the primary consumers, then the secondary and then finally the tertiary consumers which are the ones that get the lest amount of energy.

Explanation: Hope this helps.

4 0

2 years ago

16. In which of these cases do we have enough information to say that the atom is electrically neutral? A. The atom has 15 neutr

vichka [17]

It's B the atom has 4 neutrons and 4 protons because atom can be completed through the existence of neutron and proton which stay inside of the neuclues of atom

3 0

3 years ago

Read 2 more answers

A two-liter soft drink bottle can withstand apressure of

larisa86 [58]

Explanation:

According to the ideal gas equation, PV = nRT.

where, P = pressure, V = volume

n = no. of moles, R = gas constant

T = temperature

Also, density is equal to mass divided by volume. And, no. of moles equals mass divided by molar mass.

Therefore, then formula for ideal gas could also be as follows.

P = $\frac{mass}{volume \times molar mass} \times RT$

or, P = $\frac{density}{\text{molar mass}} \times RT$

Since, density is given as 0.789 g/ml which is also equal to 789 g/L (as 1000 mL = 1 L). Hence, putting the given values into the above formula as follows.

P = $\frac{density}{\text{molar mass}} \times RT$

= $\frac{789 g/l}{46.06 g/mol} \times 0.0821 L atm/mol K \times 373 K$

= 525 atm

As two-liter soft drink bottle can withstand a pressure of 5 atm and the value of calculated pressure is 525 atm which is much greater than 5 atm.

Therefore, the soft drink bottle will obviously explode.

4 0

3 years ago

Agree or disagree that a scientific theory can be modified provide evidence along!!!!!!!

oksano4ka [1.4K]

Answer:

I agree.

Explanation:

7 0

2 years ago

Which has the highest viscory ? Milk ? Water ? Orange juice?

Snezhnost [94]

I guess you mean viscosity
Anyhow the answer is milk

5 0

2 years ago