Explain why it is important to eat the wet sand before heating the iron wool​

Iron is a metal.

Iron wool is made up of thin strands of

iron loosely bundled together.

Your teacher has attached a piece of

iron wool to a see-saw balance. At the

other end of the see-saw is a piece of

Plasticine.

Iron wool can combust. Your teacher is

going to make the iron wool combust by

heating it.

If there is a change in mass, the see-saw

will either tip to the left or to the right.

Explanation:

huh,eat wet sand b4heating iron wool??

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

i think it is true since you can test the answer and can use observations to complete it.