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3 years ago

Workers in coal mines use battery operated torch lights instead of lanterns. What is the reason?

Chemistry

1 answer:

weqwewe [10]3 years ago

3 0

it is much more efficient and environmentally conscious.

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Identify the independent /manipulated variable

fiasKO [112]

Answer:

independent- test variable

manipulated - outcome variable; if needed, there could be changes.

Explanation:

knowledge

7 0

2 years ago

Are there other universes?

____ [38]

Our universe may be one of many, physicists say. The universe we live in may not be the only one out there

8 0

3 years ago

A piece of brass is found to have a mass of 24.32 g. When placed in a graduated cyclinder with an initial reading of 5.60 mL the

Jobisdone [24]

Answer:

$\rho=3.1g/mL$

Explanation:

Hello,

In this case, considering that the density of a body is computed given its mass and volume:

$\rho =\frac{m}{V}$

Taking into account that the mass is 24.32 g and the volume is computed via the difference between the volume of the water with the brass and the volume of water by itself as follows:

$V=13.50mL-5.60mL=7.9mL$

The density of the piece of brass turns out:

$\rho =\frac{24.32g}{7.9mL}\\\\\rho=3.1g/mL$

Best regards.

4 0

3 years ago

Identify the charges = Mg2+ F1

gladu [14]

Answer:

its called drop and swap

Explanation:

4 0

3 years ago

1. Write the name of any four chemical preservatives mixed with readymade Food.

Inga [223]

Answer:

There are many different types of preservatives like Benzoic acid, Calcium Sorbate, Erythorbic Acid, Potassium Nitrate and Sodium Benzoate. Some act like antioxidants used for slowing down spoilage like Ascorbyl Palmitate, Butylated Hydroxy anisole (BHA) and Butylated Hydroxytoluene (BHT

4 0

2 years ago