3 years ago

What are pollutants of greatest concern and who is at risk?

1 answer:

6 0

Oil leakage in aquatic areas. (fish)
Burning fuel. (Air/global warming)
Toxic waste burried in dirt (living Creatures)
Lights/Electricity (destroyes Birds migration)
Noise (migration on dolphines and other sea mammals)

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A construction worker uses 1,000 J of work to screw two boards together. The screw does 855 J of work. Calculate the efficiency

Dovator [93]

Answer:

The efficiency of the screw is 85.5%

Explanation:

to calculate efficiency you have to do

efficiency=energy output/ energy input × 100%

so e=855/1000 × 100%=85.5%

7 0

3 years ago

Container A and container B hold samples of the same ideal gas. The volume and the pressure of container A is equal to the volum

SVETLANKA909090 [29]

Answer:

A. TA = TB/2.

Explanation:

Since container A has half as many molecules of the ideal gas in it as container B. Therefore, container A will have half the volume of gas as in container B:

$V_A = \frac{1}{2}V_B$