The best and most correct answer among the choices provided by your question is the third choice or letter C.
<span>The speed of sound in steel is greater than it is in air because steel is more dense than air.</span>
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
The statement: Mass affects how fast an object falls is true.
Answer: 60 seconds
Explanation:
The following information can be derived from the question:
rt=d,
150r = 100
Divide through by 150
r = 100/150
r = 0.67
r = 0.67 feet/second
Fir the second part of the question,
100r=100
r = 100/100
r = 1
r= 1 feet/second
combined rate will now be:
= 0.67+1
= 1.67 feet/second
We then slot it back into the formula
rt = d
1.67t = 100
t = 100/1.67
t= 59.88 seconds
t = 60 seconds approximately