Atropical storm becomes a hurricane when wind speeds reach 50 km/hr.

False

Explanation:

Hurricanes are the heavy storms that form over the ocean in the places where there is warm water. They catch this warm water energy and draws it to the atmosphere and water vapor also is present. Along with these, the wind also is necessary that blows gently high up towards the atmosphere and also it blows strongly near the surface region on earth. Due to these, the strong wind rotates at a considerably faster rate which ultimately forms a hurricane.

Generally, a typical storm that blows below the speed of 70-75 mph is considered as the tropical storms but if it exceeds this speed then they are considered to be a hurricane. Hurricanes are very violent storms and cause huge damage.

Thus, the above statement is false.

the real answer is b. scintillation counter

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.