Physic Lab 3: Bernoulli´s Principle

Practice #3

Bernoulli's principle can be derived from the principle of conservation of energy. This states that, in a steady flow, the sum of all forms of mechanical energy in a fluid along a streamline is the same at all points on that streamline. This requires that the sum of kinetic energy and potential energy remain constant. If the fluid is flowing out of a reservoir the sum of all forms of energy is the same on all streamlines because in a reservoir the energy per unit mass (the sum of pressure and gravitational potential ρ g h) is the same everywhere.

Material

-Dryer
-Styrofoam balls
-Cans


Questions

1. Explain the Benoulli´s principle
Bernoulli´s principle states that for an inviscid flow, an incrase in the speed of the fuid occurs simoustaneously with a decrease in pressure or a decrease in the fluids isotential energy.

2. Describe what you saw in the lab.
The balls were raised and kept in the air when weto put the dryer on, until we turned off the dryer the balls were falling.
3. What happened with the ping pong ball?
The ping pong ball stayed suspended in the air.

4. Why happened this?
Because of the air of the dryer the and the lightness of the balls, cause that the balls kept in the air

5. What happened with the cans?
When we blow in the middle of the cans they got joined.



Results & Images

Members of the Team

Carlos Abreu Espinoza

Larissa Ch

Diego Herrera Delgado

Erika Estrada

Jonathan Vazquez Jimenez

Leslie Melissa

Physic Lab 2: Liquid´s Density.

Practice #2

Material

-  Oil

-  Water

-  condensed milk

Procedure
We take our three liquids and weight each one in order to obtein the mass
With te cuantity of each sustance we obteined the volume of eaach liquid
We calculated the density if each substance
We saw the difference in density of the liquids and determined wich substance was the most dense and we tried to analize why?

Results & Images

 
Water

m=10g                                                p= m/V  =  10g/10cm3   = p=  1g/cm3

V=10ml=10cm2

Oil 
m=9g                                                  p= m/V  =  9g/10cm3  = p= 0.9g/cm3
V10ml=10cm3      

condensed milk
m=14.9g                                   p= m/V   =  14.9g/10.1cm3  =   p=1.47g/cm3
V=10.1ml=10.1cm3
                     

Physical Explanation

Density is defined like the number of molecules that certain substance has and certain molecules are more tightly packed than others and substance have varieties in the number of molecules, so that´s the reason why liquids are more dense than others. 

Members of the Team

Carlos Abreu Espinoza

Larissa Ch

Diego Herrera Delgado

Erika Estrada 

Jonathan Vazquez Jimenez

Leslie Melissa

Physic Lab Cubes.

Practice #1

Density is the mass of a substance per unit of volume, so if you measure both mass and volume of a given sample, you can calculate its density by dividing mass by volume.

Procedure
1. We weighed and measured the 5 types of cubes in order to calculate the density of each one.
2. We calculated the volume (v) of each cube with the formule v: L*L*L, we obtained the L measuring the cube faces.
3. We calculated the density of each cube with the formule p: m/v, we obtained the mass of each cube (m) weighing each cube.

Observations
As a result we observed that all the cubes had the same or nearly the same measure in size, however the difference in weigh was notable because the cubes were made of different materials, some heavier than others.So the volume and density of the cubes was also variable.


Results & Images

1.Cube E                            
13.2gr
size:
1.15 cm
1.1 cm
1.1 cm

V= 139cm2
p= m/v 
p= 13.2gr/ 1.39cm2
p= 9.49gr/cm

2. Cube P
13.9 gr
size:
1.1 cm
1.1 cm
1.1 cm

V= 1.33cm2
p= m/v 
p= 13.9gr/1.33cm2
p= 10.45gr/cm

3. Cube A
3.5 gr
size:
1.1 cm
1.1 cm
1 cm

V= 1.21cm2
p= m/v 
p= 3.5gr/1.21cm2
p= 2.89gr/cm

4. Cube of wood
0.5 gr
size:
1 cm
1 cm
1 cm

V= 1cm2
p= m/v 
p= 0.5gr/1cm2
p= 0.5gr/cm

5. Cube L
11.2 gr
size:
1.1 cm
1.1 cm
1.1 cm

V= 1.33cm2
p= m/v 
p= 11.2gr/ 1.33cm2
p= 8.42gr/cm

Physical Explanation

An object's density is determined by comparing its mass to its volume. If you compare a rock and a cork that are the same size (they have equal volume), which is heavier? The rock is, because it has more mass. The rock is denser than the cork, then, because it has more mass in the same volume - this is due to the atomic structure of the elements, molecules, and compounds that make it up.

Members of the Team

Carlos Abreu Espinoza

Larissa Ch

Erika Estrada

Diego Herrera Delgado

Jonathan Vazquez Jimenez

Leslie Melissa