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notka56 [123]
3 years ago
9

PLZ HELP I WILL GIVE YOU 30 POINTS

Chemistry
2 answers:
schepotkina [342]3 years ago
8 0

Answer:

C

Explanation:

you need a wheel And axle for the bike.

You need the pulley for the chain to pull the tires

you need the inclined plane to test the bike

you need a screw to make sure the wheel and axle is in place.

pishuonlain [190]3 years ago
8 0

Answer:

C

Explanation:

im doing the test

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Answer:

17

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3 years ago
The measure of how closely a set of measurements are to each other is the best definition for which of the following terms. a er
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D. precision. At first glance you can mark out A and B because the answers does not relate to the question. If question had said "what do you call it when the measurement is close to the actual answer" then you would have picked C. So that leaves you D. precision.
6 0
3 years ago
Espresso Coffee House is designing a coffee mug that keeps liquids hot. The research department tested several different materia
raketka [301]

Answer:

This question is incomplete

Explanation:

This question is incomplete because the result of the described experiment would have better determined the type of scientific explanation to profer. However, the type of material that will preserve the relative hotness or temperature of the hot coffee for the longest time will be a material than can resist heat transfer. These materials tend to keep hot substances hot by not allowing the heat of the coffee to be conducted or pass through it. These materials are mostly insulators or made by placing an insulator between two heat conductors.

Generally, heat is usually transferred from a region of higher concentration to a region of lower concentration, hence when the heat is denied of this transfer, the heat will remain trapped in the "heat-donor" substance (in this case the hot coffee). Thus, the material chosen (A, B or C) will be the material that resists heat transfer the most based on the explanation above.

4 0
4 years ago
7. A gas ______.
enot [183]

Answer:

C

Explanation:

A gas is a state of matter that has no fixed shape and no fixed volume gases have lower density than other states of matter such as solids and liquids.

7 0
3 years ago
1. The first four-legged animals to reach land were classified as
andrezito [222]

Explanation:

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  • Waterbody never stops moving and this tidal movement brings a lot of changes in the environment around- flora and fauna. However, global warming causing the melting of ice and glaciers has impacted heavily on this causing the extinction of certain species.  
  • Earlier when these environmental changes were not so rapid, marine life in terms of flora and fauna flourished underwater. There was no soil erosion, seawater contamination in terms of industrial waste being released and other contaminants causing loss of marine life.
5 0
4 years ago
Read 2 more answers
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