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kodGreya [7K]
2 years ago
7

A body accelerate uniformly from rest at 2m/s square.Calculate its velocity after traveling 9m

Physics
1 answer:
Thepotemich [5.8K]2 years ago
5 0
The correct answer for this question is 6m/s. I hope this helps.
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A gas undergoes a process in a piston–cylinder assembly during which the pressure-specific volume relation is pv1.1 = constant.
Sati [7]

Answer:

\Delta u = 53.99 Btu/lbm

Explanation:

given data:

P_1 = 160 lbf/in^2 = 23040 lbf/ft^2

P_2 = 300 lbf/in^2 = 56160 lbf/ft^2

V_1 = 1ft^3

Q = - 2.1 Btu

PV^{1.1} = constant

P_1V_1^{1.1} = P_2V_2^{1.1}

V_2 = V_1 [\frac{P_1}{P_2}]^{1.1}

       =  1 [\frac{23040}{56160}]^{\frac{1}{1.1}

       = 0.44 ft^3

work done during polytropic process

w = \frac{P_2V_2 - P_1V_1}{1-n}

   = \frac{56160 \times 0.4759 - 23040\times 1}{1 - 1.2}

   = -18442.1 ft lbf

we know 1 Btu = 778.169 ft. lbf, therefore

w = -23.6993 Btu

Q = W + m\Delta u

-2.1 = - 23.6993 + 0.4 \Delta u

\Delta u = 53.99 Btu/lbm

8 0
3 years ago
An unknown gas effuses 2.165 times faster than xe. what is the molar mass of the gas? show the set up and answer with unit.
lyudmila [28]

The unknown gas has a molar mass of 27.94 g/mol.

<h3>Steps</h3>

Use Graham's Law, which states that the rate of effusion of a gas is proportional to its molar mass squared.

Two different gases, (a) and (b), are compared in the following equation, which expresses this:

(R(a)/R(b)^2 = M(b)/M (a)

The effusion rate is R.

M, the molar mass

If gas (a) is the unknown gas and Xe(M = 131 g/mol) is the second gas, then the answer to your question is:

Square both sides, and you get:

(2.165)² = 131 g/mol/ M (a)

M(a)(2.165)² = 131

M(a) is equal to 131/(2.165)² = 27.94 g/mol.

Thus, the unknown gas has a molar mass of 27.94 g/mol.

<h3>How is molar mass determined?</h3>

Divide each element's atomic weight (found in the periodic table) by the quantity of that element's atoms in the compound. Add up the totals, and then follow the number with the units of grams/mole.

Learn more about Graham's law of effusion here brainly.com/question/22359712

#SPJ4

6 0
1 year ago
Which will increase the energy of motion of water molecules?
Allisa [31]
A) add heat will be the answer
4 0
3 years ago
A runner whose mass is 54 kg accelerates from a stop to a speed of 7 m/s in 3 seconds. (A good sprinter can run 100 meters in ab
Darya [45]

Answer:

a. F=126N

b. E_K=1323J

Explanation:

Given:

m=54kg

v=7 m/s

t= 3s

The runner force average to find given the equations

a.

F=m*a

a=\frac{v}{t}

F=m*\frac{v}{t}=54kg*\frac{7m/s}{3s}

F=126N

b.

Work done by the system by this force so

W=F*d

W=E_K

E_K=\frac{1}{2}*m*v^2

E_K=\frac{1}{2}*54kg*(7m/s)^2

E_K=1323J

6 0
2 years ago
Find the current passing through each of the 3 resistors connected parallel to each other as shown in the figure (i1, i2, I3). S
Thepotemich [5.8K]

Answer:

I1 = ε/R1

I2 = ε/R2

I3 = ε/R3

Explanation:

From the image, we see that the resistors are connected in parallel. This means that the voltage passing through them is the same.

Now, formula for current is; I = V/R

In this case, V which is voltage is denoted by ε.

Thus;

I1 = ε/R1

I2 = ε/R2

I3 = ε/R3

3 0
3 years ago
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