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ivanzaharov [21]
3 years ago
7

Force = 33 newtons

Engineering
1 answer:
kicyunya [14]3 years ago
4 0

Answer:

answer

Explanation:

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Mining is an example of this type of business
luda_lava [24]

Answer:

Mining would go under Industry organization.

5 0
3 years ago
An insulated piston-cylinder device contains 0.15 of saturated refrigerant-134a vapor at 0.8 MPa pressure. The refrigerant is no
Stells [14]

Answer:

Assumption:

1. The kinetic and potential energy changes are negligible

2. The cylinder is well insulated and thus heat transfer is negligible.

3. The thermal energy stored in the cylinder itself is negligible.

4. The process is stated to be reversible

Analysis:

a. This is reversible adiabatic(i.e isentropic) process and thus s_{1} =s_{2}

From the refrigerant table A11-A13

P_{1} =0.8MPa   \left \{ {{ {{v_{1}=v_{g}  @0.8MPa =0.025645 m^{3/}/kg } } \atop { {{u_{1}=u_{g}  @0.8MPa =246.82 kJ/kg } -   also  {{s_{1}=s_{g}  @0.8MPa =0.91853 kJ/kgK } } \right.

sat vapor

m=\frac{V}{v_{1} } =\frac{0.15}{0.025645} =5.8491 kg\\and \\\\P_{2} =0.2MPa  \left \{ {{x_{2} =\frac{s_{2} -s_{f} }{s_{fg }}=\frac{0.91853-0.15449}{0.78339}   = 0.9753 \atop {u_{2} =u_{f} +x_{2} }(u_{fg}) =  38.26+0.9753(186.25)= 38.26+181.65 =219.9kJ/kg \right. \\s_{1} = s_{2}

T_{2} =T_{sat @ 0.2MPa} = -10.09^{o}  C

b.) We take the content of the cylinder as the sysytem.

This is a closed system since no mass leaves or enters.

Hence, the energy balance for adiabatic closed system can be expressed as:

E_{in} - E_{out}  =ΔE

w_{b, out}  =ΔU

w_{b, out} =m([tex]u_{1} -u_{2)

w_{b, out}  = workdone during the isentropic process

=5.8491(246.82-219.9)

=5.8491(26.91)

=157.3993

=157.4kJ

4 0
3 years ago
How many grams is one molecule of calcium oxide?
MakcuM [25]

Answer:

Molar mass -56.0774 g/mol

There is a way to calculate this

atomic number for calcium is 20

atomic number for oxygen is 8

The molar mass for calcium is 40

The molar mass for oxygen is 16

CALCIUM OXIDE

40. +. 16

=56g/mol

1 molecule = 1×56=56g/mol

2 molecules=2×56 =112g/mol

5 0
2 years ago
Consider a nuclear power plant that produces 1200 MW of power and has a conversion efficiency of 34 percent (that is, for each u
KIM [24]

Answer with Explanation:

The relation between power and energy is

Energy=Power\times Time

Since the nuclear reactor operates at 1200 MW throughout the year thus the energy produced in 1 year equals

E=1200\times 10^{6}\times 3600\times 24\times 365=3.784\times 10^{16}

Now from the energy mass equivalence we have

E=mass\times c^2

where

'c' is the speed of light in free space

Thus equating both the above values we get

3.784\times 10^{16}=mass\times (3\times 10^{8})^{2}\\\\\therefore mass=\frac{3.784\times 10^{16}}{9\times 10^{16}}=0.42kg

Since it is given that 1 kg of mass is 34% effective thus the mass reuired for the reactor is

mass_{req}=\frac{mass}{\eta }=\frac{0.43}{0.34}=1.235

Thus 1.235 kg of nuclear fuel is reuired for operation.

7 0
3 years ago
g Write a program that takes in a positive integer as input, and outputs a string of 1's and 0's representing the integer in bin
Phoenix [80]

Answer:

The solution is written in Python

  1. binary = ""
  2. decimal = 13
  3. quotient = int(decimal / 2)  
  4. remainder = decimal % 2
  5. binary = str(remainder) + binary
  6. while(quotient >0):
  7.    decimal = int(decimal / 2)
  8.    quotient = int(decimal / 2)  
  9.    remainder = decimal % 2
  10.    binary = str(remainder) + binary
  11. print(binary)

Explanation:

Firstly, we declare a variable <em>binary</em> and initialize it with an empty string (Line 1). This <em>binary </em>is to hold the binary string.

Next, we declare variable <em>decimal, quotient </em>and<em> remainder </em>(Line 2-4). We assign a test value 13 to decimal variable and then get the first quotient by dividing decimal with 2 (Line 3). Then we get the remainder by using modulus operator, % (Line 4). The first remainder will be the first digit joined with the binary string (Line 5).  

We need to repeat the process from Line 3-5 to get the following binary digits. Therefore create a while loop (Line 7) and set a condition that if quotient is bigger than 0 we keep dividing decimal by 2 and calculate the quotient and remainder and use the remainder as a binary digit and join it with binary string from the front (Line 9-11).

At last, we print the binary to terminal (Line 13).

4 0
3 years ago
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