All categories

3 years ago

A heat engine is a device able to transform work into heat. a. True b. False

Engineering

1 answer:

mojhsa [17]3 years ago

3 0

Answer:

Option B: False

Explanation:

A heat engine is a device which operates in a manner that heat is converted into mechanical work.

A simple example of a heat engine is a drinking bird. The oscillatory motion of the drinking bird is as a result of the thermal expansion and contraction of a chemical compound in its beak, which creates an imbalance in its position of equilibrium. This causes it to oscillate.

Heat engines usually work by extracting heat once there is a temperature gradient available in the system and using it to perform work. Another good example is the internal combustion engine. It extracts heat from the explosion of the burning fuels and uses it to power the car.

You might be interested in

An undeformed specimen of some alloy has an average grain diameter of 0.050 mm. You are asked to reduce its average grain diamet

aleksandrvk [35]

Answer:

Yes it is possible

Explanation:

Procedures to be taken:

Step 1:

I will deform the specimen, that is, I will subject the specimen to plastic deformation at room temperature.

Step 2:

Also, I will anneal the deformed specimen at a high temperature.

Step 3:

Then, recrystallize the annealed specimen

Step 4:

Finally, I will facilitate the grain growth until the average grain diameter becomes 0.02mm.

5 0

3 years ago

A 50 Ibm block is moving at 4 ft/s. Find Its total kinetic energy? Also find Its kinetic energy per unit mass is

Kamila [148]

Answer:

Total kinetic energy= 400 puondal foot

Kinetic energy per unit mass= 8 (poundaul foot/lb)

Explanation:

To determine the total kinetic energy of the block we use the equation:

Kinetic energy = (1/2) × m × (v^{2}) = (1/2) × (50lb) × (4 foot/s)^{2}) =

= 400 poundal foot

To establish the kinetic energy per unit of mass we must simply divide the value of the total kinetic energy obtained previously by the mass of the block obtaining:

Kinetic energy per unit mass= (400 poundal foot) / (50lb) =

= 8 (poundaul foot/lb)

3 0

3 years ago

He is going ___ in the hot air ballon

Vladimir [108]

no artical shoul be used here

5 0

3 years ago

For each of the following stacking sequences found in FCC metals, cite the type of planar defect that exists:

lana [24]

Answer:

a) The planar defect that exists is twin boundary defect.

b) The planar defect that exists is the stacking fault.

Explanation:

I am using bold and underline instead of a vertical line.

a. A B C A B C B A C B A

In this stacking sequence, the planar defect that occurs is twin boundary defect because the stacking sequence at one side of the bold and underlined part of the sequence is the mirror image or reflection of the stacking sequence on the other side. This shows twinning. Hence it is the twin boundary inter facial defect.

b. A B C A B C B C A B C

In this stacking sequence the planar defect that occurs is which occurs is stacking fault defect. This underlined region is HCP like sequence. Here BC is the extra plane hence resulting in the stacking fault defect. The fcc stacking sequence with no defects should be A B C A B C A B C A B C. So in the above stacking sequence we can see that A is missing in the sequence. Instead BC is the defect or extra plane. So this disordering of the sequence results in stacking fault defect.

6 0

4 years ago

PLZ HELP ME PLZ I NEED HELP AS FAST AS POSSIBLE PLZ I WILL MARK THE BEST ANSWER AS BRAINLYIEST The most dangerous time to be on

MatroZZZ [7]

I think the answer is B) 1 a.m. and 5 a.m. I very sorry if it is wrong plz let me know if it is wrong bro thankx

8 0

3 years ago

Read 2 more answers