Usually, continental tropical air masses influence the United States during summer time. This type of air mass are classified as hot and dry and if it is unstable, you can’t see clouds because of low humidity. However if there’s huge amount of continental tropical air masses, drought can occur.
Answer: 
Explanation:
Voltage is calculated by Ohm's Law:

Answer:
Newton's second law of motion states that the acceleration ( a) experienced by an object is directly proportional to the net force ( Fnet) experienced by the object and inversely proportional to the mass of the object. In equation form, it could be said that a = Fnet/m. The net force is the vector sum of all the individual force values.
Explanation:
I think the answer is A
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im not the best with physics but i think its right