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3 years ago

11

"Coal mines may contaminate groundwater in a location." What does this statement most likely represent?

2 answers:

Annette [7]3 years ago

8 0

Answer: an observation

Coal mining is a process of excavation of coal from the deeper layers of the earth crust. The mining process generally involves the unsaturated region but it adversely affect the saturated region, where groundwater reservoir is present. This results in the infiltration of the residues and sediments into the groundwater, hence contaminate it.

The given situation is an observation because it can be based upon facts and evidences.

Aleks04 [339]3 years ago

5 0

By now ... 2018 ... after 200 years of experience and evidence,
it's an observation.

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At 100 km/hr, the car's kinetic energy is

KE = (1/2) (mass) (speed)²

KE = (1/2) (1575 kg) ( [100 km/hr] x [1000 m/km] x [1 hr/3600 sec] )²

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3 years ago

If a 1.3 kg mass stretches a spring 4 cm, how much will a 5.8 kg mass stretch the

Likurg_2 [28]

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3 years ago

A 100 kg bag of sand has a weight on 100 N. When dropped its acceleration is what?

Anettt [7]

Answer:

The acceleration of the bag of sand is $1\ m/s^2$ .

Explanation:

We have,

Mass of a bag of sand is 100 kg

Weight of the bag of sand is 100 N

It is required to find the acceleration of the bag when it is dropped. The weight of an object is given by :

$F =ma$

When it is dropped, a = g

$g=\dfrac{F}{m}\\\\g=\dfrac{100}{100}\\\\g=1\ m/s^2$

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3 years ago