Which is an example of a molecule?

a) muscle tissue

b) protein

c) stomach

d) unicellular organism

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

You can decrease the resistance of a length of wire by

What is the mass of the water that is being heated? it requires 2,500 joules to raise a certain amount of water (c = 4.186 jig c) from 20.0°c to 60.0°c. o 159 o 40 g o 63 g o 80 g