A: 8.1 • 10^7 nanometers
Because 1cm = 1 • 10^7 nm
So 8.1cm • (1 • 10^7 nm) = 8.1.10^7
2.50 × 10 ^-5. Move your decimal until you get a whole number. Then count how many times you moved it and that is your exponent. So your exponent is -5 because you're going to the left, if you're going to the right it would be a positive number.
A heating curve graphically represents the phase transitions that a substance undergoes as heat is added to it. The plateaus on the curve mark the phase changes. The temperature remains constant during these phase transitions.
Answer:
step 2
hope this helps!
please mark as brainiest<3
The answer is Liquid iron.
