What do the kidneys do if ph levels are too high or too low in the blood?

a. they release substances into the blood to neutralize the ph levels.
b. they filter the blood so that all substances in the blood are flushed out of the system.
c. they do nothing; a high or low ph cannot be corrected once it impacts the blood.

Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.

An airplane flies eastward and always accelerates at a constant rate. at one position along its path it has a velocity of 34.3 m/s, it then flies a further distance of 40100 m and afterwards its velocity is 47.5 m/s. find the airplane\'s acceleration and calculate how much time elapses while the airplane covers those 40100 m.

What can you increase the strength of an electromagnet by