Mountain Bike Lessons
Grade 8 Science help!?!? Please!!?
Hi,
So I have some science homework due tomorrow and i don’t know how to do it.
I need to answer 3 questions, the unit i’m doing is Mix and flow of matter – And the lesson is on pressure and compression of liquids.
Identify which material in each pair below woud compress more than the other. Provide a reason for each.
A) A helium balloon or a water balloon
B) A solid rubber bicycle tire and an iflated mountain bike tire
C) Plastic bubble-wrap or a liquid filled baby’s teething ring
D) A golf ball or a soccer ball
2. If 10 N of force is applied to an area of 1 m2, what is the pressure?
3.A hydraulic lift has 1000 N applied to an input piston that has an area of 30 cm2.
A) What is the pressure exerted on the liquid by the input piston?
B) If the force was doubled what would be the pressure?
C) If the area was reduced to 15 cm2 what would be the pressure?
A) Helium – gas compresses more than liquid
B) inflated tire – gas compresses more than solid
C) bubble-wrap – gas compresses more than liquid
D) soccer ball – gas compresses more than solid
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