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Sonbull [250]
3 years ago
14

Which of the following is not a fluid?

Physics
2 answers:
Alinara [238K]3 years ago
4 0
The choices are confusing. Air, oil, and alcohol are fluids at any reasonable temperature. Dry cement is not.
Amanda [17]3 years ago
4 0

Answer:

Dry cement

Explanation:

Matter can be in three different states: solids, liquids or gases. Liquids or gases are also called 'fluids'. The main difference between solids and fluids is:

- in solids, the molecules are bond together, and so they cannot move freely inside the substance, but they can only vibrate around their position. For this reason, solids have a well-defined shape and they occupy a well-defined volume.

- in fluids, the molecules are NOT bond together, and so they are free to move. For this reason, fluids do not have a well defined shape or volume, but they tend to occupy the volume of their conteiner.

Among the choices given, we see that air, oil and alcohol respect the conditions listed for fluids, so they are fluids; on the contrary, dry cement respects the conditions listed for solids, so it is a solid.

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It takes a minimum distance of 57.46 m to stop a car moving at 13.0 m/s by applying the brakes (without locking the wheels). Ass
vivado [14]

Answer:

The minimum stopping distance when the car is moving at

29.0 m/sec = 285.94 m

Explanation:

We know by equation of motion that,

v^{2}=u^{2}+2\cdot a \cdot s

Where, v= final velocity m/sec

u=initial velocity m/sec

a=Acceleration m/Sec^{2}

s= Distance traveled before stop m

Case 1

u=  13 m/sec, v=0, s= 57.46 m, a=?

0^{2} = 13^{2}  + 2 \cdot a \cdot57.46

a = -1.47 m/Sec^{2} (a is negative since final velocity is less then initial velocity)

Case 2

u=29 m/sec, v=0, s= ?, a=-1.47 m/Sec^{2} (since same friction force is applied)

v^{2} = 29^{2}  - 2 \cdot 1.47 \cdot S

s = 285.94 m

Hence the minimum stopping distance when the car is moving at

29.0 m/sec = 285.94 m

4 0
2 years ago
What is true about energy that is added to a closed system
arsen [322]
It does work or increases thermal energy
4 0
3 years ago
Read 2 more answers
A 3-m-high large tank is initially filled with water. The tank water surface is open to the atmosphere, and a sharp-edged 10-cm-
DanielleElmas [232]
3-m-high large tank is initially filled with water. The tank water surface is open to the atmosphere, and a sharp-edged 10-cm-diameter orifice at the bottom drains to the atmosphere through a horizontal 80-m-long pipe. If the total irreversible head loss of the system is determined to be 1.5 m, determine the initial velocity of the water from the tank. Disregard the effect of the kinetic energy correction factors.
5 0
3 years ago
Suppose a car traveling at 8m/s is brought to rest in a distance of 20m.what is it's deceleration and time taken.
LiRa [457]

Answer:

         Time - taken = 2.5 s

          deceleration= -8 m/s²

Solution:

            Given:

                     speed, v = 8 m/s

                 distance, d = 20m

                     

              To Find:

                     deacceleration = ?

               

               As we know speed is defined as

                          v = d/t

                plugging in the values

                          t =  20/ 8

                          t = 2.5s

                Now from deceleration formula

                        a =  - v/ t

                        a = - 20/ 2.5

                        a = - 8 m/s²

          Thus, the time taken and acceleration is 2.5 s and -8 m/s²

          respectively.

          Learn more about deceleration here:

                brainly.com/question/13354629

                       #SPJ4  

               

                       

             

7 0
2 years ago
A 500 kg car starts with a force of 1000 N
Nadya [2.5K]

Answer:

2 m/s²

30 m/s

Explanation:

1) F = ma

1000 N = (500 kg) a

a = 2 m/s²

2) Given:

v₀ = 0 m/s

a = 2 m/s²

t = 15 s

Find: v

v = at + v₀

v = (2 m/s²) (15 s) + 0 m/s

v = 30 m/s

3 0
3 years ago
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