Answer:
17 kJ
Explanation:
q = mCΔT
q = (55 kg) (4.184 kJ/kg/K) (360 K − 285 K)
q = 17,000 J
Answer:
Space out your studying. Nate Kornell “definitely did cram” before big tests when he was a student. ...
Practice, practice, practice! ...
Don't just reread books and notes. ...
Test yourself. ...
Mistakes are okay — as long as you learn from them. ...
Mix it up. ...
Use pictures. ...
Find examples.
Explanation:
False. That description fits the wave's 'frequency'.
It has nothing to do with refraction.
Answer:
1) 341 Hz
Explanation:
When a string vibrates, it can vibrate with different frequencies, corresponding to different modes of oscillations.
The fundamental frequency is the lowest possible frequency at which the string can vibrate: this occurs when the string oscillate in one segment only.
If the string oscillates in n segments, we say that it is the n-th mode of vibration, or n-th harmonic.
The frequency of the n-th harmonic is given by

where
n is the number of the harmonic
is the fundamental frequency
Here we have:
is the frequency of the 3rd harmonic
So the fundamental frequency is

And so, the frequency of the 2nd harmonic is:

Answer:
the answers are the first and last option