1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Irina-Kira [14]
3 years ago
15

Burn rate can be affected by: A. Variations in chamber pressure B. Variations in initial grain temperature C. Gas flow velocity

D. All of the above
Engineering
1 answer:
Digiron [165]3 years ago
4 0

Answer: D) All of the above

Explanation:

Burn rate can be affected by all of the above reasons as, variation in chamber pressure because the pressure are dependence on the burn rate and temperature variation in initial gain can affect the rate of the chemical reactions and initial gain in the temperature increased the burning rate. As, gas flow velocity also influenced to increasing the burn rate as it flowing parallel to the surface burning. Burn rate is also known as erosive burning because of the variation in flow velocity and chamber pressure.

You might be interested in
A 60-cm-high, 40-cm-diameter cylindrical water tank is being transported on a level road. The highest acceleration anticipated i
dlinn [17]

Answer:

h_{max} = 51.8 cm

Explanation:

given data:

height of tank = 60cm

diameter of tank =40cm

accelration = 4 m/s2

suppose x- axis - direction of motion

z -axis - vertical direction

\theta = water surface angle with horizontal surface

a_x =accelration in x direction

a_z =accelration in z direction

slope in xz plane is

tan\theta = \frac{a_x}{g +a_z}

tan\theta = \frac{4}{9.81+0}

tan\theta =0.4077

the maximum height of water surface at mid of inclination is

\Delta h = \frac{d}{2} tan\theta

            =\frac{0.4}{2}0.4077

\Delta h  0.082 cm

the maximu height of wwater to avoid spilling is

h_{max} = h_{tank} -\Delta h

            = 60 - 8.2

h_{max} = 51.8 cm

the height requird if no spill water is h_{max} = 51.8 cm

3 0
3 years ago
In a website browser address bar, what does “www” stand for?
Ludmilka [50]

Answer:

www stands for world wide web

Explanation:

It will really help you thank you.

3 0
3 years ago
A heat pump operates on a vapor-compression refrigeration cycle with R-134a as the working fluid. The refrigerant enters the com
Rudiy27

Answer:

Hello your question has some missing information below are the missing information

The refrigerant enters the compressor as saturated vapor at 140kPa Determine The coefficient of performance of this heat pump

answer : 2.49

Explanation:

For  vapor-compression refrigeration cycle

P1 = P4  ; P1 = 140 kPa

P2( pressure at inlet ) = P3 ( pressure at outlet ) ; P2 = 800 kPa

<u>From pressure table of R 134a refrigerant</u>

h1 ( enthalpy of saturated vapor at 140kPa ) = 239.16 kJ/kg

h2 ( enthalpy of saturated liquid at P2 = 800 kPa and t = 60°C )

= 296.8kJ/kg

h3 ( enthalpy of saturated liquid at P3 = 800 kPa ) = 95.47 kJ/kg

also h4 = 95.47 kJ/kg

To determine the coefficient of performance  

Cop = ( h1 - h4 ) / ( h2 - h1 )

∴ Cop = 2.49

3 0
3 years ago
How do you keep the weight evenly distributed on a trailered boat?
Neporo4naja [7]
C because i know what i’m taking about
7 0
3 years ago
1) (35 pts) For the curved lifting bar, calculate the stresses at A, B, and the centroid of the section.
Juliette [100K]

I know the Answer but first you should add me as Brainliest and I Will edit this to Answer.

3 0
2 years ago
Other questions:
  • 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
    10·1 answer
  • The inlet and exhaust flow processes are not included in the analysis of the Otto cycle. How do these processes affect the Otto
    6·1 answer
  • When we utilize a visualization on paper/screen, that visualization is limited to exploring: Group of answer choices Relationshi
    9·1 answer
  • A chemistry student accidentally drops a large mercury thermometer and it breaks. The thermometer contained 2 grams of mercury (
    13·1 answer
  • A 24-tooth gear has AGMA standard full-depth involute teeth with diametral pitch of 12. Calculate the pitch diameter, circular p
    5·2 answers
  • A can of engine oil with a length of 150 mm and a diameter of 100 mm is placed vertically in the trunk of a car. On a hot summer
    8·1 answer
  • Technician a says that diesel engines can produce more power because air in fuel or not mix during the intake stroke. Technician
    9·1 answer
  • Market research is a good place to start the design process and usually involves asking questions about consumers.
    5·1 answer
  • Consider a single crystal of some hypothetical metal that has the FCC crystal structure and is oriented such that a tensile stre
    7·1 answer
  • What was a campaign belief in the 1980 presidential election? Carter called for a stronger national defense. Carter promised to
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!