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Bad White [126]

3 years ago

12

Exercises

1 answer:

Feliz [49]3 years ago

5 0

Answer:

Rocket

Gas

Explanation:

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If in Example 1.2,q = (10 - 10e2) mC, find the current at t = 0.5 s.

NeTakaya

Answer:

pls mark me as brainliest

Explanation:

Answer: 7.36 mA

3 0

3 years ago

The system is initially moving with the cable taut, the 15-kg block moving down the rough incline with a speed of 0.080 m/s, and

garik1379 [7]

Solution :

The spring is expanded by 2 times of the block when it moves down an inclined by x times.

Here, $x_1$ = 39 mm

$x_2$ = 225 mm

a). From the work energy principal,

Work forces = kinetic energy

$(mg \sin 50^\circ)\times \frac{99}{1000}-(\mu_k mg \cos 50^\circ) \times \frac{99}{1000} -\frac{1}{2}k(0.225^2 - 0.039^2)=\frac{1}{2}m(V^2_2-0.08^2)$

$(112.6 \times 0.099)-(14.17 \times 0.099)-4.91= 7.5(V^2_2-0.08^2)$

$9.75= 7.5(V^2_2-0.08^2)$

$1.3= V^2_2-0.08^2$

$V_2=1.14\ m/s$

b). calculating the distance travelled by the block before it comes to rest.

Substitute the value of $V_2$ in (1),

$-(\mu_kmg \cos 50^\circ)x + (mg \sin 50^\circ)x-\frac{1}{2}k\left( ( 2x+0.039)^2 - 0.039^2\right)= -\frac{1}{2}m(0.08)^2$

$-14.17x+112.6x - 100(4x^2+0.156x)=-0.048$

$98.43x - 100(4x^2+0.156x)+0.048=0$

$98.43x - 400x^2-15.6x+0.048=0$

$82.83x - 400x^2+0.048=0$

$400x^2- 82.83x-0.048=0$

x = 0.20 m

4 0

3 years ago

Solve the problem with conditions if a wall has inner and outer surface temperatures of 16 and 6 C, respectively. The interior a

Angelina_Jolie [31]

Answer:

Heat flux is 20 W/m^2

Explanation:

Heat flux (Q) is computed as

$Q = h \, \Delta T$

where h is heat transfer coefficient and ΔT is the difference between body's temperature

From the interior air to the inner wall

$Q = 5 \frac{W}{m^2 K} \, 4 K$

$Q = 20 \frac{W}{m^2}$

From the the outer wall to the exterior air

$Q = 20 \frac{W}{m^2 K} \, 1 K$

$Q = 20 \frac{W}{m^2}$

The wall is under steady-state condition because heat flux is constant

7 0

3 years ago

A 1m3 tank containing air at 25℃ and 500kPa is connected through a valve to

Aliun [14]

Answer:

The right answer is "2.2099 m³".

Explanation:

Given:

Mass,

m = 5 kg

Temperature,

T = 35℃

or,

= 35 + 273

Pressure,

P = 200 kPa

Gas constant,

R = 0.2870 kj/kgK

By using the ideal gas equation,

The volume will be:

⇒ $PV=mRT$

or,

⇒ $V=\frac{mRT}{P}$

By substituting the values, we get

$=\frac{5(0.2870)(35+273)}{200}$

$=\frac{441.98}{200}$

$=2.2099 \ m^3$

8 0

3 years ago

Design a logic circuit that has a 4-bit binary number as an input and one output. The output should be 1 iffthe input is a prime

Maurinko [17]

Answer:

Check the explanation

Explanation:

Solution

Let the $L_1$ binary input one A,B,C,D and output is F with $L_1$ binary inputs we have $16=2^4$ combination as in below.

Kindly check the attached image below to get the full step by step explanation to the question above.

5 0

4 years ago