Question

1.) Saltwater is slightly denser than fresh water. If you swim below the surface in saltwater, will the pressure be greater than in freshwater at the same depth?/1 2.) Suppose that you balance a5 kg ball on the tip of your finger, which has an area of 0.0001 m. Find the pressure on your finger in Pa Don't forget to first find the force of gravity on the ball/3 3) Why isn't there a horizontal buoyant force on an object in water?/1 4.) The density of water is 1.00 kg/L. What is the mass of 2L of water? What is its weight in Newtons? 12 5.) The density of tungsten is 19.2 kg/L. What is the mass of 2L of tungsten? What is its weight in Newtona? /2 6.) Will tungsten sink or float? How do you know?/1 7) How does the density of air change when you compress it to a quarter of its volume? This is the same as decreasing it by a factor of 4./2 8.) What happens to the air pressure inside a balloon when you squeeze it to a quarter of its volume!/2 9. Calculate the amount of urt force in Newtons if the wings of an aircraft have an area of 600 mº and the atmospheric pressure difference between the top and bottom of the wings is 3.8 Pa/2 • Previous Next to search o е в i G 3 DOLL F8 F9 F10 F11 F12 FO Pulser

Answer 1

I have solved your problem which is shown below:

Homework 7

Question: Saltwater is slightly denser than fresh water. If you swim below the surface in saltwater, will the pressure be greater than in fresh water at the same depth?

Answer: Yes the pressure will be greater because we know that the pressure at depth = hrg

Where h = depth

r = density of fluid

g= acceleration due to gravity

as we know rw<rsw which leads that pressure is directly proportional to the density keeping h and g constant. Thus pressure will be greater in saltwater as compare to the fresh water.

Question 2 : Suppose that you balance a 5 kg ball on the tip of your finger, which has an area 0.0001 m^2.Find the pressure on your finger in Pa. Don’t forget to first find the force of gravity on the ball?

Answer: We know that Pressure = And force = mg which is equal to the weight of the body.

g= 9.8 m/s^2

m = 5Kg

A = 0.0001

So P =

Question 3: Why isn’t there a horizontal buoyant force on an object in water?

Answer: Buoyant force is acted on the due to the pressure difference in the body. As When the body is move horizontally then there won’t be any pressure difference in the body so the buoyant force doesn’t act horizontally.

Question 4: The density of water is 1 Kg/L. What is the mass of 2L of water? What is its weight in newton?

Answer: Density = 1 Kg/L

Mass = density x Volume = 1 kg/L x 2 L = 2 Kg

Weight = Mg = 2 x 9.8 = 19.6 N

g= acceleration due to gravity = 9.8 m/s^2

According to HOMEWORKLIB RULES I can solve only first 4 part of a first question which is shown above.

In case you have any query please write in a comment. I hope you like it. Thank you