The answer is c. it requires no works
John needs to see a physical therapist because he cannot walk very well.
Answer:
<h3>The answer is 0.54 m</h3>
Explanation:
The wavelength of a wave can be found by using the formula

where
c is the velocity
f is the frequency
So we have

We have the final answer as
<h3>0.54 m</h3>
Hope this helps you
Answer:
1: 19,6 N | 2: 686 N | 3: 705,6 N
Explanation:
Just apply the formula:
1: 2 . 9,8 = 19.6 N
2: (60+10) . 9,8 = 686 N
3: [30 + (6 . 7)] . 9,8
[30 + 42] . 9,8
72 . 9,8 = 705.6 N
Just sum all the weights in the system and then multiply by gravity (9,8 in this case)
Ok I don’t know the answer I’m in 5th grade but 2431 is wrong