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N76 [4]
3 years ago
6

Please help it’s a test due today

Chemistry
2 answers:
tiny-mole [99]3 years ago
7 0
The answer is it takes more force to move the lighter sack C)
ycow [4]3 years ago
5 0

Answer:

<u>c) More force has to be used to lift the heavier sack.</u>

Explanation:

Using more force to lift the heavy sack of rice makes you really tired. Thus it's harder to lift a 100 pound sack of rice than to lift a 5 pound bag of sugar.

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This is due in five mintues please help
Fittoniya [83]

Answer:

5

Explanation:

Na, N, O, O, O

5 0
2 years ago
Which features do sound waves have that ocean and light waves do not? Check all that apply.
photoshop1234 [79]

Answer: Sound waves are sound and oceans waves are water waves. Water waves are bigger

Explanation:

5 0
3 years ago
Read 2 more answers
Explain 3 sources of carbon dioxide production and explain how the production of CO2 can lead to global warming.
prisoha [69]

Answer:

Natural sources include decomposition, ocean release and respiration. Human sources come from activities like cement production, deforestation as well as the burning of fossil fuels like coal, oil and natural gas.

Explanation:

3 0
2 years ago
What happens to the mass of substances during a physical change?
Anna [14]

Here are the answers in order:

1. During a physical change the substance changes physically.

2. The law of conservation of mass is a law stating the conservation of mass cannot be higher than 46mg or lower than 32mg.

3. A hypothesis is a guess that you make before completing a science experiment, it can be considered a law because it is important to know why you are making the guess.

4. During a chemical change the mass is changing colors. This is a representation of a chemical change.

5. Oil is a non-renewable resource, so it cannot demonstrate the conservation of mass.

6. When the color of the substance has changed or when it explodes.

7. Reactants are the objects that react when in a chemical change.

8. If you follow the rule of not going higher than 46mg and not lower than 32mg then it will automatically follow this law.

Chemical Reactions Part One Video:

1. mass

2. erupt-ant

3. reactant

4. object

5. mixtures

6. molecules

7. color changed

Questions again:

1. A chemical reaction

2. A physical change

3. Because if it is no higher than 46mg and no lower than 32mg then it will follow on it's own.

8 0
3 years ago
Read 2 more answers
Water is a pure substance. Which of the following is true about water? (4 points) Its compounds can only be physically separated
jonny [76]

Answer:

Water/H20 is a compound made of hydrogen and oxygen. Although water is the most abundant substance on earth, it is rarely found naturally in its pure form. Most of the time, pure water has to be created. Pure water is called distilled water or deionized water.

Explanation:

7 0
3 years ago
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