When air is blown across the top of an open <span>water bottle, air molecules in the bottle vibrate at a particular frequency and sound is produced in a process called "refraction".
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Speed, why velocity has direction acceleration Is a change in speed and it doesn't give a direction so it's speed
Well water would prob be your best bet, you could extract the salt first and then use a magnet to seperate the iron filing from the sand
To solve this problem we will apply the concepts related to the calculation of power, from the two electrical forms:


Here,
V = Voltage
I = Current
R= Resistance
P = Power
PART A)

Replacing,


Resistance of bulb is 
PART B)



The bulb will draw 1.25A current