<span>NaCH is not an element, it is a compound. An element can be found and identified on the periodic table to elements. A compound is a combination of two of more elements. NaCH is composed of three elements: Na (sodium), C (carbon) and H (hydrogen), making it a compound.</span>
Answer: D
X and Y
Explanation:
X The least amount of magnesium Took in magnesium
Y Slightly less magnesium than the cell Took in magnesium
Because active transport occurs when ions or molecules move from less concentration region to high concentration region through semi membrane with the help of some energy.
Answer:
correct answer is b
Explanation:
The frequency of a wave depends on the properties of medium density and the elasticity properties change the amplitude depends on the energy carried by the wave, that is, the amplitude is proportional to the height of the wave (oscillation).
Consequently the amplitude of independent of the frequency because it depends on different factors.
Therefore when changing the amplitude the wavelength remains constant
the correct answer is b
Answer:
option A
Explanation:
the correct answer is option A
when the air temperature increases the relative humidity decreases.
When temperature increase the ability to hold water vapor decreases.
higher the water vapor more will be the amount of moisture content.
it take less water vapor to saturate air in a city with low temperature compared with high air temperature.
Answer:0.210 ft/min
Explanation:
Given
Length of trough 
width of base 
height of triangle
From Similar triangles property
volume of water in time t
differentiating
at 
