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ella [17]
3 years ago
8

Which statement about energy is correct?

Chemistry
1 answer:
DENIUS [597]3 years ago
7 0

Answer:

B) is true

Explanation:

because in the 24th century that we are now people have created machine that can work without energy

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What is the mass of an original 5.60-gram sample of iron-53 that remains unchanged after 25.53 minutes?
olga_2 [115]
Answer is 0.7 g

Reason: Given: mass of Fe = 5.60 gWe know that, half life of Fe-53 = t1/2 (Fe-53) = 8.51 min.
Thus, after 25.53 mins, number of half life passed = 25.53/8.51= 3

Now, Amount left after first half life = 5.60g/2 = 2.80 g
Amount left after second half life = 2.80g/2 = 1.40 g
Amount left after third half-life = 1.40g/2 = 0.7g.
4 0
4 years ago
An air-to-air heat pump ____ heat from the outside air and deposits it in the conditioned space
givi [52]

According to the research, the correct option is remove. An air-to-air heat pump removes heat from the outside air and deposits it in the conditioned space.

<h3>What are heat pumps?</h3>

It is characterized by being a thermal machine or a device based on thermodynamics that, through an absorption process, takes heat from one place and transfers it to another, that is, it extracts heat from a cold source to a hot one.

An air-to-air heat pump starts by sucking in outside air or recovers heat from outside and transfers it to a higher temperature level in the ambient air, raising the temperature of the room, being adjustable to adapt to the heating needs of  the conditioned space.

Therefore, we can conclude that according to the research, the correct option is remove. An air-to-air heat pump removes heat from the outside air and deposits it in the conditioned space..

Learn more about heat pumps here: brainly.com/question/1081420

#SPJ1

8 0
2 years ago
What is the advantage of seeds that can be spread over a wide area?
Tema [17]

Answer:

I'm fairly sure it's D

Explanation:

If they're more spread out than they're roots in theory should have more space. Sorry if I'm wrong

6 0
3 years ago
1. 1.204 x 1024 atoms He = ? moles He
Fantom [35]

Check your chemistry textbook (or class notes) concerning molar mass, then look up the value for oxygen.

Then divide Avogadro’s number into the given amount of atoms, to find the number of moles.

Then combine this result appropriately with the molar mass, and voilà!

…Then reconsider posting homework questions without showing the work you have already done.

5 0
3 years ago
Which characteristic will the animal in the image pass on to its offspring<br> Help me out please
Rina8888 [55]

Answer:

Sea turtle

Is the animal in the image

5 0
2 years ago
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