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
UNO [17]
3 years ago
13

You are testing a new jet engine in a test cell at sea level conditions. You measure the mass flow through the engine and find i

t is 125 kg/sec of air plus 2.5 kg/sec of fuel. The velocity ahead of the engine may be assumed to be zero (it is a static test). The velocity of the exhaust is 340 meters/second. The load cell in the test stand (which measures engine thrust) reads 60,000 Newtons. Is the load cell reading correctly within 2%? If not, what should the load cell read?
Engineering
2 answers:
bulgar [2K]3 years ago
5 0

Answer:

43248 newtons.

Explanation:

Force = mass x accelerations and units of force are newtons which are given in the question.

here mass = 125 of air and 2.2 of fuel, total = 125+2.2=127.5kg/s  and the velocity of the exhaust is 340m/s.

force = 340m/s * 127.5kg/s = 43248 newtons technically this is wrong (observe units) but i will expalin how i have taken acceleration as a velocity here and mass/unit time as simply mass.

see force is mass times acceleration or deceleration, here our velocity is not changing therefore it is constant 340m/s but if it were to change and become 0 in one second then there would be -340m/s^2 (note the units ) of deceleration and there would be force associated with it and that force is what i have calculated here. similarly there would be mass in flow rate of mass per second, which is also in that one second of time.

let's calculate error.

error = (actual-calculated)/actual. = (43248-60000)/43248= -38.734% less is ofcourse greater than 2%.

So the load cell is not reading correct to within 2% and it should read 43248newtons.

USPshnik [31]3 years ago
5 0

Answer:

The answer is 43350 newton

Explanation:

As per the question,

Mass=125.

Air =2.5

Velocity=340.

So the formula is,

F=ma.

Total=125+2.5=127.5

Applies the formula now,

F=ma

force = 340×127.5 = 43350

Calculate error now,

Error=((actual-calculated)/actual))

(43350-60000)/43350= -38.40%

Hence greater than 2%.

You might be interested in
The components of your sample mixture are present in trace amounts. Assuming that you will be using GC, what kind of sample intr
Oxana [17]

Answer:

Gas Chromatography (GC or GLC) is a commonly used analytic technique in many ... for quality control as well as identification and quantitation of compounds in a mixture. ... A broad variety of samples can be analyzed as long as the compounds are ... Most analytical gas chromatographs use capillary columns, where the ...

Explanation:

5 0
3 years ago
How many kg / day of NaOH must be added to neutralize a waste stream generated by an industry producing 90,800 kg / day of sulfu
hram777 [196]

Answer:

74.12kg/day

Explanation:

Equation of reaction for the neutralization reaction of sodium hydroxide and sulfuric acid: 2NaOH + H2SO4 yields Na2SO4 + 2H2O

Mass of sulfuric acid produced per day = 90,800kg

Percentage of sulfuric acid in wastewater = 0.1%

Mass of sulfuric acid that ends up in wastewater per day = 0.1/100 × 90,800 = 90.8kg

From the equation of reaction, 2 moles of NaOH (80kg of NaOH) is required to neutralize 1 mole of H2SO4 (98kg of H2SO4)

80kg of NaOH is required to neutralize 98kg of sulfuric acid

90.8kg of sulfuric acid would be neutralized by (90.8×80)/98kg of NaOH = 74.14kg/day of NaOH

7 0
3 years ago
Read 2 more answers
1. Declare a variable named num with an
FrozenT [24]

The code to

  • Declare a variable and increment with a while loop until the variable is not less than 5
  • Create a function that returns the product of two numbers
  • Uses the new keyword to create an array

were written in JavaScript and are found in the attached images

<h3>Declaring a variable</h3>

The first code declares a variable called num and gives it an initial value of 0. It then enters a while loop that lauches a message box (using <em>window.alert</em>) to print the message "<em>Keep going</em>" as long as num remains less than 5.

If nothing is done within the loop to increment num towards the value 5, the loop will go on endlessly notifying the user to "<em>Keep going</em>".

So, an increment of 1 was added to the loop body to increment the variable num. This makes sure the loop terminates.

<h3>Creating a function that returns the product of two numbers</h3>

Here, a function was created that receives two arguments (n1  and n2), then returns the product (n1 * n2)

<h3>Declaring an Array</h3>

This last code segment creates an array using the new keyword. The new keyword is generally used in constructing objects.

In this case the object constructed is an array having three strings;

  • my <em>first name</em>
  • my <em>nickname</em>, and
  • my <em>last name</em>

See another solved JavaScript problem here brainly.com/question/23610566

7 0
3 years ago
2. It is a measuring instrument used to record the amount of
lyudmila [28]

Answer:

The correct option is;

D. Electric meter

Explanation:

An electric meter is a metering device that is used for the measurement of the electric power consumption of an electrical powered tools, a living space or a building

Electric meter readings are used by electric utility company to sell electric power to consumers at a given rate such that it allows the electric utility company to receive payment for the total power supplied, and for the consumer to regulate the amount of power consumed

The electric meters are usually calibrated in kilowatt hour (kWh) and prepaid meter displays the amount of units of power bought, while post paid meters are usually read once each billing period which is usually one month.

3 0
3 years ago
What is the link between fossil fuel use and flowers blooming earlier in the spring season
klio [65]

Answer:

a warmer earth due to fossil fuel emissions has milder winters and earlier springs

Explanation:

fossil fuels cause global warming which would make the winters less cold and spring and summer hotter.

5 0
3 years ago
Other questions:
  • A rectangular beam of width b = 15 in., effective depth d = 20.5 in., and total depth h = 23 in. spans 18.5 ft. between simple s
    14·1 answer
  • Many companies are combining their online business activities with an existing physical presence. In about 100 words, explain wh
    11·1 answer
  • A 3-kg block rests on top of a 2-kg block supported by, but not attached to, a spring of constant 40 N/m. The upper block is sud
    14·2 answers
  • Webster is giving a speech on the benefits of moving toward the use of windmill energy instead of having to rely on fossil fuels
    7·1 answer
  • What is a motor and were it goes in. A car
    15·1 answer
  • The value of universal gas constant is same for all gases?<br> a) yes<br> b)No
    15·1 answer
  • What is the correct order for the first three steps of the engineering design process?
    5·1 answer
  • Who engineered the first satalite on the moon before the bible was created<br>​
    14·1 answer
  • Which of the following is a problem that can occur when using an induction coil to harden parts?
    12·1 answer
  • Most of the energy used by the built environment comes from what source?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!