<h2>The answer to 9 is <em><u>slippage of a block of material moving along a curved surface</u></em></h2>
1
state the problem
<span></span>2
hypothess (prediction)
<span></span>3
design the experiment
<span></span>4
record and analyze the date
<span></span>5
<span>conclusion (what did you learn)</span>
It is called blind. a condition in which the participant is not aware if he/she is in the experimental or control group
An element's atomic number is the amount of protons (positively charge subatomic particle found in the atoms nucleus) present in one atom of that element.
L*W*H should be your answer