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katrin2010 [14]
3 years ago
9

Ejemplos de ecuacion de continuidad​

Physics
1 answer:
saveliy_v [14]3 years ago
5 0
Continuity equation (Ecuación de continuidad)
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The amount of work done by two boys who apply 200 N of force in an
Aleksandr [31]

The amount of work done by two boys who apply 200 N of force in an unsuccessful attempt to move a stalled car is 0.

Answer: Option B

<u>Explanation: </u>

Work done is the measure of work done by someone to push an object from its present position. We can also define work done as the amount of forces needed to move an object from its present position to another position. So the amount of work done is directly proportionate to the product of forces acting on the object and the displacement of the object.  

           \text { Work done }=\text { Force } \times \text { displacement }

So in this present case, as the two boys have done an unsuccessful attempts to push a stalled car so that means the displacement of the car is zero as there is no change in the position of the car. But they have applied a force of 200 N each. So the amount of work done will be

           \text { Work done }=200 \mathrm{N} \times 0=0

Thus, the amount of work done by two boys will be zero due to their unsuccessful attempt to move a stalled car.

8 0
3 years ago
Is it true that it takes more energy to vaporize 1 kg of saturated liquid water at 100 C than it would at 120 C?​
Vinvika [58]

Explanation:

Yes, it takes more energy to vaporize 1 kg of saturated liquid water at than it would at .

3 0
2 years ago
Read 2 more answers
A car’s velocity as a function of time is given by Vx (t) = α.t + β.t 2 , where α= 3m/s and β= 0.1m/s 3 . Calculate the average
s344n2d4d5 [400]

The definition of average acceleration allows to find the result for the average acceleration in the given time interval is:

          a_{average}= 1.5  \ \frac{m}{s^2}

Instantaneous acceleration is defined as the derivative of velocity with respect to time.

           a =   \frac{dv}{dt}

Where a is the acceleration, v the velocity and t the time.

They indicate that the speed of the car is given by the relation.

          v = α t + β t²

With α = 3 m / s and β = 0.1 m / s³

Let's make  the derivative.

           a = α + 2β t

Let's substitute

            a = 3 + 2 0.1 t

Average acceleration is the change in velocity in the time interval.  

          a_{average} = \frac{\Delta v}{\Delta t }

Let's find the velocity at the indicated time.

For t = 5 s

         v₅ = 3 + 0.1 5²

         v₅ = 5.5 m / s

For t = 10 s

          v₁₀ = 3 + 0.1 10²

          v₁₀ = 13 m / s

Let's calculate the average acceleration.

           a_{average} = \frac{13 - 5.5 }{ 10 - 5 }\\

           a_{average}= 1.5 \  m/s^2

In conclusion using the definition of mean acceleration we can find the result for the mean acceleration in the given time interval is:

           a_{average} =  1.5 m / s²

Learn more here: brainly.com/question/20057878

7 0
3 years ago
A 8.0-cm long solenoid has 2000 turns of wire and carries a current of 5.0-A. Calculate the strength of the magnetic field at th
CaHeK987 [17]

Answer:

B = 0.157 T

Explanation:

Given that,

Length of the solenoid, l = 8 cm = 0.08 m

Number of turns in the wire, N = 2000

Current, I = 5 A

We need to find the strength of the magnetic field at the center of the solenoid. It is given by the formula as follows :

N=\mu_o nI, N is number of turns per unit length of solenoid.

So,

B=4\pi \times 10^{-7}\times \dfrac{2000}{0.08}\times 5\\\\=0.157\ T

So, the magnetic field at the center of the solenoid is 0.157 T.

6 0
3 years ago
After a nucleus undergoes radioactive decay, its new mass number is:
Ivanshal [37]
Radioactive "decay" means particles and stuff shoot OUT of a nucleus.
After that happens, there's less stuff in the nucleus than there was before.
So the new mass number is always less than the original mass number.
7 0
4 years ago
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