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natita [175]
3 years ago
9

A water holding tank measures 85 m long, 55 m wide, and 9 m deep. Traces of mercury have been found in the tank, with a concen-

tration of 65 mg/L.
What is the total mass of mercury in the tank?
Answer in units of kg.
Physics
1 answer:
Lesechka [4]3 years ago
4 0

Answer:

Mass = 2734.875 kg

Explanation:

Given that A water holding tank measures 85 m long, 55 m wide, and 9 m deep.

The volume = 85 × 55 × 9 =

= 42075 m^3

Traces of mercury have been found in the tank, with a concen- tration of 65 mg/L.

1 m^3 = 1000 L

Convert cubic meters to litres.

42075 × 1000 = 42075000 L

From definition of density,

Density = mass ÷ volume.

Substitute the given density and the calculated density into the formula

65 = mass ÷ 42075000

Cross multiply

Mass = 65 × 42075000

Mass = 2734875000 mg

Convert mg to kg

To do that, you will divide the answer by 1000000

2734875000 ÷ 1000000

= 2734.875 kg

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8 0
3 years ago
a 7 kilogram cat is resting on top of a bookshelf that is 2 meters high. what is the cat’s gravitational potential energy relati
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A clam of mass 0.12 kg dropped by a seagull takes 3.0 s to hit the ground. [Neglect friction.]
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8 0
3 years ago
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Answer:

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4 0
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