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2 years ago

11

Can someone please explain what to do it’s late at night and I need sleep but I forgot I had this homework please help me with a

few questions I’m desperate :(

1 answer:

Rus_ich [418]2 years ago

4 0

Answer:

1) it takes 13 second

2) 2100 miles

3) 40 miles / hours

4) 730 meters

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Rocks. Because the air water and soil are part of carbon.

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3 years ago

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Which of the following suggests that a physical change has taken place in an ice cube

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The melting of the ice cube indicates physical change has taken place

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3 years ago

A chemical equation does not give information about what

Lana71 [14]

A chemical equation does not give information about the following:

It usually does not give the "state of the substances". There are three states: Solid(s), liquid(q) and gas(vap).
The chemical equation does not show whether it is complete or incomplete.
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3 years ago

How does an indicator differentiate between an acid and base?

Svet_ta [14]

Answer:

that is all I know sorry hope that may help you :)

Explanation:

Indicator is a substance which shows different colors in acidic and basic medium. Indicators can be natural (derived from natural sources) or artificial ( man-made) for example :

*Litmus is an indicator. Acid turns blue litmus into red while base turns red litmus into blue

* Turmeric solution does not show change in color (remains yellow) in acidic solution and turns red in basic solution.

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1 year ago

A family of four lives in a three-bedroom house and uses an average of 900 kWh of electricity per month. The family cools their

agasfer [191]

<h2>Answer:</h2><h2>The percentage of the family’s total annual electricity that is used to run the two air conditioners for the three summer months = 19.4 %</h2>

Explanation:

Average electricity consumed per month = 900 kWh

The family cools their house for three months during the summer with two window-unit air conditioners

The power consumed by one window-unit air conditioners = 350 kWh

The power consumed by two window-unit air conditioners = 350(2) = 700 kWh

Power consumed for two air conditioners for the three summer months = 700 (3) = 2100 kWh

Total power consumed for 1 year = 900 (12) = 10800kWh

The percentage of the family’s total annual electricity that is used to run the two air conditioners for the three summer months = $\frac{2100}{10800}100$ = 19.4 %

5 0

2 years ago