A mixture of gas expands from 0.03m³ to 0.06m³ at constant pressure of 1MPa & absorbs energy of 84 J. Calculate the change in internal energy?

Answer:

i would say a bus because it has to speed up after the turn

Answer:

The bus

Explanation:

when the bus turns it has a change in direction and since velocity is a vector based on speed and direction the velocity is considered changed and since acceleration is a change in velocity the bus is an example of acceleration

Answer:

i don't understand

explain one more

Answer:

0.054m/s²

Explanation:

Here we are given that a 31kg block is being pulled by two men who apply forces of 8.3N and 6.6N in opposite directions .

So we know that ,

[tex]\sf \longrightarrow \boxed{\red{\rm F_{net}= \sqrt{F_1^2+F_2^2+2F_1F_2cos\theta }}}[/tex]

where [tex]\theta[/tex] is the angle between the forces .

[tex]\sf \longrightarrow F_{net}= \sqrt{ (8.3N)^2+(6.6N)^2+2(8.3)(6.6)(cos180^o)}\\ [/tex]

[tex]\sf \longrightarrow F_{net}= \sqrt{ (8.3N)^2+(6.6N)^2+2(8.3)(6.6)(-1)}\\ [/tex]

[tex]\sf \longrightarrow F_{net}= \sqrt{ (8.3N)^2+(6.6N)^2-2(8.3)(6.6)}\\ [/tex]

[tex]\sf \longrightarrow F_{net}=\sqrt{( 8.3N - 6.6N)^2} \\ [/tex]

[tex]\sf \longrightarrow F_{net}= 8.3N - 6.6N \\ [/tex]

[tex]\sf \longrightarrow \red{ F_{net}= 1.7N} \\ [/tex]

Now we know that ,

[tex]\sf \longrightarrow F_{net}= mass * acceleration \\ [/tex]

[tex]\sf \longrightarrow 1.7N = 31kg * a\\ [/tex]

[tex]\sf \longrightarrow a =\dfrac{1.7N}{31kg}\\ [/tex]

[tex]\sf \longrightarrow \underline{\boxed{\bf accl^n = 0.054 m/s^2}} \\ [/tex]

The trucker’s average velocity who drives the truck along  a straight highway is 64 km/h in south.

Average velocity of a body is the ratio of displacement of a body in the given time. In case of average velocity, the displacement of the body is the same for each interval of time.

Average velocity can be calculated with the following formula.

[tex]\overline v =\dfrac{\Delta x}{\Delta t}[/tex]

Here, Δx is the displacement and Δt is the change in time. The average velocity can be positive or negative.

A trucker drives along a straight highway for 0.25 h with a displacement of 16 km south.

The displacement of the truck is 16 km in the south direction, and change in time to cover this distance is 0.25 hours. Thus, the average velocity of the truck is,

[tex]\overline v =\dfrac{16}{0.25}\\\overline v =64 \rm\; km-h^{-1}[/tex]

Hence, the trucker’s average velocity who drives the truck along  a straight highway is 64 km/h in south.

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Answer:

melissa drove with 60 miles per hour

Explanation:

240:6=60

Answer:

A ther mody namic system absorbs 300J of heat and at the same time 400J of work is done onit calculate the change

Answer:

» Direct current only flows in one direction with out reversing whereas alternating current flows in a sinusoidal wave form and reverse its direction of flow.

Explanation:

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The net vertical force on the object is

∑ F[vertical] = n - mg = 0

where n is the magnitude of the normal force exerted by the surface, m is the object's mass, and g is the mag. of acceleration due to gravity. It follows that

n = mg = (25 kg) (9.8 m/s²) = 245 N

The net horizontal force is

∑ F[horizontal] = 300 N - f = ma

where f is the mag. of friction and a is the object's acceleration.

We have

f = µn

where µ is the coefficient of friction. Since the object starts at rest, it won't move and accelerate unless the applied force of 300 N is sufficient to overcome the maximum static friction, which is

f = 0.50 n = 0.50 (245 N) = 122.5 N

Since f < 300 N, the box will begin to slide, at which point the coefficient of kinetic friction kicks in and the mag. of friction is

f = 0.30 n = 0.30 (245 N) = 73.5 N

Now solve for a :

300 N - 73.5 N = (25 kg) a

a = (226.5 N) / (25 kg)

a = 9.06 m/s² ≈ 9.1 m/s²

The statement which best explains why nickel will reach the ground first is: C. The force of air resistance acts more strongly on the sheet of paper than on the nickel.

Gravity can be defined as a force of attraction that controls the movement of objects and the planets such as Earth around the Sun.

Some of the factors that affect the force of gravitational attraction that is acting on an object or a physical body include the following:

Generally, nickel will reach the ground first before a sheet of paper due to the effect of the force of air resistance because it would act more strongly on the sheet of paper than on the nickel.

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Answer:

154 is the speed i think, correct me if i am wrong

Explanation:

The speed of the given wave is 160.86 m/s. The speed of the wave can be calculated by dividing the frequency by the wavelength of the wave.

The speed of the wave can be calculated by dividing the frequency by the wavelength of the wave.

[tex]s = \dfrac f \lambda[/tex]

Where,

[tex]f[/tex] - frequency = 370.0 Hz.

[tex]\lambda[/tex] - wavelength =  2.30 m

Put the values in the formula,

[tex]s = \dfrac {370}{2.3}\\\\s =160.86 \rm \ m/s[/tex]

Therefore, the speed of the given wave is 160.86 m/s.

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The rocket will cover [tex]1 \times 10^3\rm \ m[/tex] distance in 4. 5 s. Acceleration can be defined as the change in velocity.

Acceleration can be defined as the change in speed or the direction of the object.

From kinamatic equation:

[tex]D = v_{t} +\dfrac 12at^2[/tex]

Where,

[tex]D[/tex] - final velocity =  445 m/s

[tex]v_0[/tex] -  initial valocity = 0 m/s

[tex]a[/tex] - acceleration = 99. 0 m/s²

[tex]t[/tex] - time =  4. 50 s

Put the values in the formula,

[tex]D = 0\times ( 4.5) + \dfrac12\times (99)(4.5)^2\\\\D = 1002 {\rm \ m}\\\\D = 1 \times 10^3\rm \ m[/tex]

Therefore, the rocket will cover [tex]1 \times 10^3\rm \ m[/tex] distance in 4. 5 s.

Learn more about Acceleration :

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Answer:

a.

Explanation:

Use accleration formula,

[tex]a = \frac{v _{f} - v _{i}}{t} [/tex]

The initial velocity and final velocity is at zero. and t=10

So we got

[tex] \frac{0}{10} = 0[/tex]

so

[tex]a = 0[/tex]

a is the answer

According to the principle of conservation of momentum, the momentum of the bouncing ball changes.

Also, the ball bounces less than its original height because some energy is lost due to heat, friction and air resistance.

The principle of conservation of momentum states that for any collision occurring in an isolated system, momentum is conserved.

a. For a body such as a ball dropped from a height, the total momentum  is conserved.

However, there is a change in momentum of the ball as some of its momentum is transferred to the earth.

b. When the ball a ball of mass M is released from a height H1, it bounces to a height H2, which is about 1/2 of H1.

The value of H2 is less than that of H1 because some of the energy is converted to heat energy due to friction and air resistance, thereby its energy is less than its original value.

Therefore, the momentum of the bouncing ball is changes. Also, the ball bounces less than its original height because some energy is lost due to heat, friction and air resistance.

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Answer:

A

Explanation:

Lance was never a bright young fella so he rolled down a hill and lost his left boot

Answer:

hhjjj

Explanation:

j

Answer:  Igneous Rocks. Like Magma, it's a mixture of many minerals.

Explanation:

Answer:

Doubled

Explanation:

Because it's velocity is constant

Answer:

12 volt

Explanation:

More volts=more resistance.

Answer:

Magnification of the objective lens used and the magnification of the ocular lens.

Explanation: I hope you have/had an amazing day today<3

So, their net force on the object is 50 N in a forward direction from the first person.

Hi ! Here, I will help you with the net forces (results of forces) acting on a two-dimensional area and in opposite directions. Steps that can be taken are as follows :

The equation for calculating the net force from this two-dimensional straight line is as follows:

[tex] \boxed{\sf{\bold{\sum F = F_1 + F_2 + ... + F_n}}} [/tex]

With the following condition :

We know that :

In my mind, I determined that the force will go to forward direction from the first person. So :

What was asked :

Step by step :

[tex] \sf{\sum F = F_1 + F_2} [/tex]

[tex] \sf{\sum F = 200 + (-150)} [/tex]

[tex] \sf{\sum F = 200 - 150} [/tex]

[tex] \boxed{\sf{\sum F = 50 \: N} [/tex]

The movement of the object is forward (from the first person) because the net force value that I calculated is not opposite (with negative sign) to the right direction. So, their net force on the object is 50 N to the forward direction from first person.