Coal mining produces not only air pollution but solid waste; ash and flue - gas desulferization sludge ( look it up ), which contains toxic arsenic and radioactive uranium among other heavy metals. Water becomes polluted with these harmful substances through mountain top removal mining and so underwater creatures are poisoned and plants absorb deadly substances and die, which also contributes to the aquatic organisms death as the plants may have been a food source.
A good night's sleep improves recall to the previous day's events by facilitating the transfer of memories from the cerebral cortex. Sleep makes you feel better, however, its important is way beyond boosting the mood or banishing under eye circles. Adequate sleep is a key part of a healthy lifestyle, and can benefit the heart, weight, and mind among others. It improves memory, also curbs inflammation which is linked to heart disease, stroke, diabetes, arthritis, and premature aging, among other benefits.
Specialized cells perform specialized functions in multicellular organisms.
Answer:
Explanation:
Amount of water displaced by the sphere will be equal to the volume of complete sphere.
As the sphere completely sinks to the bottom of the cup.
We have been given;
Diameter of sphere (d) = 4.6 cm
So,
Volume of sphere (V):
By substituting value of r we get:
1 cm³ = 1 mL
V = 51 mL
So,
Water displaced by the sphere = 51 mL
