unit one: fluids

Question 1

what are the properties of fluids?

Answer 1

pressure, volume, density, and speed

Question 2

does density change when the quantity of the fluid changes?

Answer 2

no, density is not dependent upon the mass or volume of a fluid.

Question 3

what is the formula for density?

Answer 3

p=m/v

Question 4

what are the units for density?

Answer 4

kg/m^3

Question 5

what is the universal density of water?

Answer 5

1000kg/m^3

Question 6

what is pressure?

Answer 6

the force per unit of area.

Question 7

what is the SA unit of pressure?

Answer 7

Pa or Pascals.

Question 8

what is the formula for pressure?

Answer 8

P=F/A

Question 9

what are the units for pressure?

Answer 9

N/m^2

Question 10

what is atmospheric pressure?

Answer 10

the average air pressure at sea level.

Question 11

atmospheric pressure is also known as?

Answer 11

1 atm, 1x10^5 pa, or 101.3kpa

Question 12

according to newton’s second law, when a particle hits a wall it should…

Answer 12

move at an equal and opposite direction than the one it initially was going.

Question 13

why does f=ma also mean f=2mv/t

Answer 13

because when the particle is moving at a downward velocity initially and moving upward toward the end. this means that when you do vf-vi you will get v-(-v), which is the same as v+v=2v. then you put this back into the equation v/t. (note the velocity and time are both delta)

Question 14

what is the formula for pressure?

Answer 14

P=pgh

Question 15

does the shape of a container change the pressure for a fluid?

Answer 15

no, only the depth/height of a fluid determines the pressure when density is given (p) and gravity is given (G).

Question 16

to find the true pressure at a given depth, you must add…

Answer 16

atmospheric pressure to the pressure of the fluid.
(P=Po+pgh)