Answer:
-2.13 V
Explanation:
Given parameters are:
m/s
m/s
C
kg
By conservation of energy principle, we know that the potential difference between two points is equal to the change in the kinetic energy between these points.

Hence,

⇒
V
Answer : The correct option is, (D) 278 K
Explanation :
We are given temperature
.
Now the conversion factor used for the temperature is,

where, K is kelvin and
is Celsius.
Now put the value of temperature, we get

Therefore, the temperature 278 K is equal to the 
Diagram A will result in the movement of the block to the left as a result of the forces.
<h3>What is Force?</h3>
This is referred to an influence which is capable of changing the motion of an object.
Diagram A has equal upward and downward force and left side which is 60N is higher than the right side which has 20N. The block will therefore move to the left.
Read more about Force here brainly.com/question/25239010
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Explanation:
v = wavelength x frequency
330 = 5 . 10-² m x f
f = 6600 Hz
the frequency that human can hear is about 20 Hz - 20000 Hz
so human can hear the note.