Answer:
The average velocity of Samuel’s entire trip is 1.16 m/s.
Explanation:
Given:
Distance covered at first checkpoint (d₁) = 925 m
Distance covered at second checkpoint (d₂) = 673 m
Time taken for reaching first checkpoint (t₁) = 10 min = 10 × 60 = 600 s [∵1 min = 60 s]
Time taken for reaching second checkpoint (t₂) = 13 min = 13 × 60 = 780 s
Now, the average velocity of Samuel's entire trip is given by the formula:
Total distance traveled is equal to the sum of the distances traveled at first and second checkpoints. So,
Total distance covered =
Total time taken =
Therefore, the average velocity is given as:
Hence, the average velocity of Samuel’s entire trip is 1.16 m/s.
Answer: The correct option is B.
Chromosomes contain genes that tell the body how to grow and work.
Explanation:
This is because chromosomes contain alot of human genes which are found in the nucleus and every humans have 23 pairs of chromosomes. The sets of genes determines some of the body features, characteristics or traits. The genes in the body form the genotype and the genotype is expressed physically which is now the phenotype i.e traits expressed physically in the body which is an indication of body appearance.
The answer is d.acid rain and air pollution
F=kx ,f is the force on the string, k is the spring constant and x is its extension
Work is transfer of energy in an object when it travel some distance by external force,
Work= force × displacement