Answer:
D) 13.62 kg/L
Explanation:
This problem can be solved by a simple rule of three.
The problem states that Mercury has a dansy of 30 lbs/L, and asks what is the density in kg/L. We have to convert from lbs to kg.
Each lb has 0.454 kg? How many kg are there in 30 lbs?
So:
1 lb - 0.454kg
30 lb - x kg
This means that mercury's density in kg/L is 13.62, letter D. Letter A is also 13.62, however it is not in the unit asked.
Serious environmental problems. :)
Answer:
A. 30 %
Explanation:
As there are 6.5 million species on land and 2.2 million in water i.e around 25 % of species including 5 % of freshwater species in oceans, thus the 80% of species on earth make up most of the terrestrial animal composition of meat and other animal products like beef, pork, chicken and other land and animals found in mountains , plains and plateaus they maybe either in Arid, semi arid and desert regions.
Answer:
Volcanoes and Earthquakes occur more frequently where tectonic plates meet or separate
Explanation:
Volcanoes do occur underwater at mid - oceanic ridges but it often occurs when the plates are separating and this usually forms new islands
Answer is B. Air temperature rises and air molecules move faster.
