<span>We need to start by finding the surface area of the pool.
50 meters multiplied by 25 meters gives us 1250 square meters.
1250 square meters multiplied by .065 (6.5 cm in meters) gives us a volume of 81.25 cubic meters of water that needs to be pumped out of the pool.
There are 1000 liters in a cubic meter so this is 81250 liters. Divide by 4.2 to find the number of seconds required to pump out this much water and we get 19345.2 seconds. This equals approximately 5.37 hours.</span>
Answer:
I think it's the last one
Explanation:
good luck
Answer:
this is from quizlet and is similar hope it helps.
Explanation:
Which of the following statements about the force on a charged particle due to a magnetic field are not valid?
Check all that apply.
a. It depends on the strength of the external magnetic field.
b. It depends on the particle's charge.
c. It depends on the particle's velocity.
d. It acts at right angles to the direction of the particle's motion.
e. None of the above; all of these statements are valid.
Alkali metals : sodium , potassium
alkaline earth : magnesium , calcium
the rest are transition elements... i don't know about "inner transition"
