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
Free_Kalibri [48]
3 years ago
13

Which of the following statements correctly describes the position of the intake and exhaust valves during most of the power sta

ge in a four-cycle gas engine? A. Both the intake valve and the exhaust valve are open. B. The intake valve is closed and the exhaust valve is open. C. The intake valve is open and the exhaust valve is closed. D. Both the intake valve and the exhaust valve are closed.
Mathematics
2 answers:
Vesna [10]3 years ago
5 0

D. Both the intake valve and the exhust valve are closed.
11111nata11111 [884]3 years ago
4 0

Answer:

D. Both the intake valve and the exhaust valve are closed good luck



You might be interested in
Find a particular solution to the nonhomogeneous differential equation y′′+4y=cos(2x)+sin(2x).
I am Lyosha [343]
Take the homogeneous part and find the roots to the characteristic equation:

y''+4y=0\implies r^2+4=0\implies r=\pm2i

This means the characteristic solution is y_c=C_1\cos2x+C_2\sin2x.

Since the characteristic solution already contains both functions on the RHS of the ODE, you could try finding a solution via the method of undetermined coefficients of the form y_p=ax\cos2x+bx\sin2x. Finding the second derivative involves quite a few applications of the product rule, so I'll resort to a different method via variation of parameters.

With y_1=\cos2x and y_2=\sin2x, you're looking for a particular solution of the form y_p=u_1y_1+u_2y_2. The functions u_i satisfy

u_1=\displaystyle-\int\frac{y_2(\cos2x+\sin2x)}{W(y_1,y_2)}\,\mathrm dx
u_2=\displaystyle\int\frac{y_1(\cos2x+\sin2x)}{W(y_1,y_2)}\,\mathrm dx

where W(y_1,y_2) is the Wronskian determinant of the two characteristic solutions.

W(\cos2x,\sin2x)=\begin{bmatrix}\cos2x&\sin2x\\-2\cos2x&2\sin2x\end{vmatrix}=2

So you have

u_1=\displaystyle-\frac12\int(\sin2x(\cos2x+\sin2x))\,\mathrm dx
u_1=-\dfrac x4+\dfrac18\cos^22x+\dfrac1{16}\sin4x

u_2=\displaystyle\frac12\int(\cos2x(\cos2x+\sin2x))\,\mathrm dx
u_2=\dfrac x4-\dfrac18\cos^22x+\dfrac1{16}\sin4x

So you end up with a solution

u_1y_1+u_2y_2=\dfrac18\cos2x-\dfrac14x\cos2x+\dfrac14x\sin2x

but since \cos2x is already accounted for in the characteristic solution, the particular solution is then

y_p=-\dfrac14x\cos2x+\dfrac14x\sin2x

so that the general solution is

y=C_1\cos2x+C_2\sin2x-\dfrac14x\cos2x+\dfrac14x\sin2x
7 0
3 years ago
What is the difference between Z1 and z2, and where is the difference located?
NeTakaya

Answer:

B

Step-by-step explanation:

Took the test

7 0
3 years ago
Read 2 more answers
Give B= {a,l,g,e,b,r} and C={m,y,t,h} find B U C
masha68 [24]

The union of a collection of sets is the set of all elements in the collection.

We have B = {a, l, g, e, b, r} and C = {m, y, t, h}

<h3>B ∪ C = {a, l, g, e, b, r, m, y, t, h}</h3>
6 0
3 years ago
The owner expects you to hand wash each coffee pot before the coffee shop opens. It takes 10 minutes for all of the coffee pots
tester [92]

Answer:

Total number of coffee pot = 16 pots

Step-by-step explanation:

Given:

Time taken for drying all coffee pot = 10 minutes

Total time taken for cleaning and drying coffee pot = 82  minutes

Time taken for clean a coffer pot = 4 ½ minutes = 4.5 minutes

Find:

Total number of coffee pot

Computation:

Total time taken for cleaning = Total time taken for cleaning and drying coffee pot  - Time taken for drying all coffee pot

Total time taken for cleaning = 82 - 10

Total time taken for cleaning = 72 minutes

Total number of coffee pot = Total time taken for cleaning / Time taken for clean a coffer pot

Total number of coffee pot = 72 / 4.5

Total number of coffee pot = 16 pots

8 0
3 years ago
Write the new function if the parent function f(x)=-2x-5 is translated 2 units left.
Natali [406]

Answer:

f(x)= -2x-3, im so sorry if this is wrong

Step-by-step explanation:

to translate it left you have to add 2

3 0
3 years ago
Other questions:
  • While shopping at the school bookstore, Ric purchased 4 book covers for $1.25 each , and a pen that cost 2/5 as much as the book
    15·2 answers
  • Identify the multiplication property used in the equation 7x2=2x7
    7·1 answer
  • The measure on angle 0 is 7pie/4. Measure of its reference angle is __ °, and the tan 0 is ___
    5·1 answer
  • If 2=6 3=12 4=20 5=30 6=42 then 9=?
    9·1 answer
  • A set of equations is given below: Equation A: q = 4r + 1 Equation B: q = 3r + 5 Which of the following is a step that can be us
    12·1 answer
  • Find x. Assume that segments that appear tangent are tangent.
    11·1 answer
  • (-6)(4) preform indicated operation
    9·2 answers
  • What type of angle is this
    11·1 answer
  • 3x = 4у + 12 .<br> What is the y intercept
    13·2 answers
  • Hi I need help with the question in the image. Step by step, thank you!
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!