Answer:
utrasonic
Explanation:
these are sounds beyond our hearing capacity range of 20-20kHz
I believe the answer is c but I’m not 100% sure
Answer:
Explanation:
You could try to say how helpful they are what they are and what they do
Answer:
A. increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object
Explanation:
Answer:
Explanation:
dU= dq+w
dU is change in internal energy of the system
dq is the amount heat added or released by the system which be positive or negative respectivelý
And w is the amount of work done by the system or on the system which will be positive or negative respectively.
Hence,
dU= 250+80= 330 J
The change will be positive
