Answer:
Salt dissolving
Explanation:
Dis solving salt in water doesn't change it's chemical composition
It hardens because you are pressing it against something.
Current = power/voltage = 1200w/120v = 10 amperes. Constantly. Whenever the heater is turned on and heating.
Answer:
Noise level will be -18.2 watt
So option (b) will be correct answer
Explanation:
We have given sound intensity 
And threshold intensity
( in question it is given as
but its standard value is
)
Now noise level 
So the noise level will be -18.2
So option (b) will be correct answer
Answer:
My favorate activies is skateboareding, and I prerfer outdoor actives.
Explanation: