Density and pressure

Question 1

What is denser salt water or fresh water?

Answer 1

Saltwater

Question 2

What is density?

Answer 2

It is a measure or how much stuff there is inside of an object.

Question 3

Who symbol is given to density and what is density measured in?

Answer 3

Rho and kgm^-3.

Question 4

The greater the pressure……..

Answer 4

The greater the force per unit area.

Question 5

What does pressure equal?

Answer 5

F/A = Force/Area

Question 6

What are the units for pressure? (2)

Answer 6

Nm^-2 or Pa

Question 7

What roughly is atmospheric pressure?

Answer 7

100,000Pa

Question 8

What will a diver feel the deeper they descend into the sea?

Answer 8

They will feel more pressure and there is more stuff above them.

Question 9

What would net force on the submarine be if it was at constant depth?

Answer 9

0

Question 10

What is a fluid?

Answer 10

A substance that flows, including liquids and gases.

Question 11

What does upthrust depend on?

Answer 11

The volume of the object

Question 12

What does upthrust not depend on?

Answer 12

The mass of the object

Question 13

Wht does displaced mean?

Answer 13

Moved out of the way

Question 14

What doe the volume of water displaced equal?

Answer 14

The volume of the object

Question 15

If an object is half submerged in water what will the value of the water displaced?

Answer 15

It’s volume divided by 2.

Question 16

Define Archemedies principle.

Answer 16

The upthrust exereted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid the body displaces.

Question 17

The larger the volume……..

Answer 17

The larger the displaced fluid.

Question 18

When does upthrust increase?

Answer 18

When the weight of one fluid is greater than another, therfore upthrust depends on the density of a fluid.

Question 19

Where on a submarine has the greatest pressure?

Answer 19

At the bottom.

Question 20

When will a submarine rise?

Answer 20

When the density of the sbumarine is less than the desnity of the displaced fluid.

Question 21

How will a submarine remain at constant depth?

Answer 21

When the density of the subarine is equal to the density of the displaced fluid.

Question 22

Define Upthrust.

Answer 22

The upward buoyant force exterted on a n object immersed in fluid due to the pressure difference of a fluid at the top and bottom of the body, equal in maginitide to the weight of displaced fluid.