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faltersainse [42]
3 years ago
10

If you know that the change in entropy of a system where heat was added is 12 J/K, and that the temperature of the system is 250

K, what is the amount of heat added to the system? a)-5J b)-125J c)- 600 J d)-5000 J e)-8000 J
Engineering
1 answer:
SVEN [57.7K]3 years ago
3 0

Solution:

Given:

Change in entropy of the system, ΔS = 12J/K

Temperature of the system, T_{o} = 250K

Now, we know that the change in entropy of a system is given by the formula:

ΔS = \frac{\Delta Q}{T_{o}}

Amount of heat added, ΔQ = \Delta S\times T_{o}

ΔQ = 3000J

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In a planetary geartrain with a form factor of 8, the sun gear rotates clockwise at 5 rad⁄s and the ring gear rotates clockwise
lina2011 [118]

Answer:

D. N= 11. 22 rad/s (CW)

Explanation:

Given that

Form factor R = 8

Speed of sun gear = 5 rad/s (CW)

Speed of ring gear = 12 rad/s (CW)

Lets take speed of carrier gear is N

From Algebraic method ,the relationship between speed and form factor given as follows

\dfrac{N_{sun}-N}{N_{ring}-N}=-R

here negative sign means that ring and sun gear rotates in opposite direction

Lets take CW as positive and ACW as negative.

Now by putting the values

\dfrac{N_{sun}-N}{N_{ring}-N}=-R

\dfrac{5-N}{12-N}=-8

N= 11. 22 rad/s (CW)

So the speed of carrier gear is 11.22 rad/s clockwise.

8 0
3 years ago
25 points and brainiest if correct A, B, C, D
hoa [83]

Answer:

A. Juna's answer is correct because both the number of feet and the number of inches are correct

Explanation:

3 0
3 years ago
Read 2 more answers
A 18-ft thick clay layer in the field (drained on one side) is normally consolidated. When the pressure is increase from 0.75 to
mihalych1998 [28]

Answer:

a) 294.34 days

b) Δh = 25.361 cm

Explanation:

Given data:

Thickness of clay layer = 18 ft

initial pressure = 0.75 ton/ft^2

final pressure = 1.5 ton/ft^2

Δp = 0.75 ton/ft^2

eo = 1.12

e1 = 0.98

k = 4.3 * 10^-7 cm/sec

A ) determine how long it will take to reach 70% consolidation

attached below is the detailed solution

T( time in days ) = 294.34 days

B) determine settlement at 70%

attached below is the detailed solution

Δh = 25.361 cm

4 0
3 years ago
A copper-constantan thermocouple is to be used to measure temperatures between 0 and 200°C. The e.m.f. at 0°C is 0 mV, at 100°C
Helga [31]

Answer:

3.941%

Explanation:

5 0
3 years ago
Code scramble: make the program sort the three numbers x, y and z into increasing order, so that x has the smallest value, y has
riadik2000 [5.3K]

Answer:

This question is taken from code scramble exercise which has scattered lines which are to be arranged by dragging and dropping with mouse to  to get the desired output in which x has the smallest value, y has the next smallest value, and z has the largest value. So the correct arrangement is as following:

tmp=max(x,y)  

x=min(x,y)  

y=tmp  

tmp=max(y,z)  

y=min(y,z)

z=tmp  

tmp=max(x,y)  

x=min(x,y)  

y=tmp

Explanation:

So the flow works as following:

First the maximum of x and y is taken and the result is stored in a temporary variable tmp which is used so that the original values do not get affected or modified by the operations performed by the functions. Lets say that x=30 y=15 and z=40

Now the max() functions returns the maximum from the values of x and y. As x=30 and y=15 so value of x is stored in tmp which is 30 as 30>15

Next the min() function finds the minimum from the values of x and y and stores the result in x. As the minimum value is 15 so this value is stored in x and now x=15

y = tmp means now the value in tmp is copied to y, So y = 30

Next the max() function finds the maximum value from the values of y and z. As y=30 and z=40 So the maximum value is 40 so tmp variable now contains the value 40.

Next the min() function finds the minimum from the values of y and z and stores the result in y. As the minimum value is 30 so this value is stored in y which means y remains 30 so, y=30

z = tmp means now the value in tmp is copied to z, So z= 40

Now the max() functions returns the maximum from the values of x and y. After the operations of above functions the new value of x and y are: x=15 and y=30 so value of y is stored in tmp which is 30 as 30>15

Next the min() function finds the minimum from the values of x and y and stores the result in x. As the minimum value is 15 so this value is stored in x and x remains: x=15

y = tmp means now the value in tmp is copied to y, So y remains: y = 30

So the final values of x, y and z are:

x = 15 y = 30 z = 40

If you want to make a program which sort the values in x, y and z then i am providing a simple Python program that serves the purpose:

x = int(input("enter first number: "))

y = int(input("enter second number: "))

z = int(input("enter third number: "))

a1 = min(x, y, z)

a3 = max(x, y, z)

a2 = (x + y + z) - a1 - a3

print("x =",a1,"y=",a2,"z=",a3)

The program asks user to enter the value for x, y and z.

Then the minimum value from the values of x,y and z is computed using min() function and the result is stored in a1. This will be the value of x. Then the maximum value from value of x,y and z is computed using max() function and the result is stored in a2. This will be the value of z. Next the statement: a2 = (x + y + z) - a1 - a3  works as following:

Lets say the values of x = 30 y = 15 and z = 40 So a1 = 15 and a2 = 40

a2 = 30 + 15 + 40 - 15 - 40

a2 = 30

This is the value of y

So  print("x = ",a1,"y = ",a2,"z = ",a3) displays the following output:

x = 15 y = 30 z = 40

3 0
3 years ago
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