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3 years ago

Do you get a better performance using premier gasoline (Octane number 93) for your compact car?

Engineering

1 answer:

topjm [15]3 years ago

6 0

Answer:

Yes

Explanation:

As we know that octane number resist the engine from knocking.If knocking can prevent that automatically the performance of engine will increases.If octane number is 100 then it means that knocking tendency in the engine is zero.So higher the octane number better will the performance of the engine.

Generally octane number is 87 but for premier gasoline is 92 or 93.

So we can say that if octane number is 93 then car will give better performance

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Water is flowing at a rate of 0.15 ft3/s in a 6 inch diameter pipe. The water then goes through a sudden contraction to a 2 inch

Georgia [21]

Answer:

Head loss=0.00366 ft

Explanation:

Given :Water flow rate Q=0.15 $\frac{ft^{3}}{sec}$

$D_{1}$ = 6 inch=0.5 ft

$D_{2}$ =2 inch=0.1667 ft

As we know that Q=AV

$A_{1}\times V_{1}=A_{2}\times V_{2}$

So $V_{2}=\frac{Q}{A_2}$

$V_{2}=\dfrac{.015}{\frac{3.14}{4}\times 0.1667^{2}}$

$V_{2$ =0.687 ft/sec

We know that Head loss due to sudden contraction

$h_{l}=K\frac{V_{2}^2}{2g}$

If nothing is given then take K=0.5

So head loss $h_{l}=(0.5)\frac{{0.687}^2}{2\times 32.18}$

=0.00366 ft

So head loss=0.00366 ft

4 0

3 years ago

You will be hiking to a lake with some of your friends by following the trails indicated on a map at the trailhead. The map says

bulgar [2K]

<h2>Answer: <u><em>64.58</em></u></h2>

Explanation:

3 0

3 years ago

Define prisms. How to draw true shape of a prism?

aksik [14]

Answer:

In geometry, a prism is a polyhedron comprising an n-sided polygonal base, a second base which is a translated copy of the first, and n other faces joining corresponding sides of the two bases. All cross-sections parallel to the bases are translations of the bases.

4 0

3 years ago

What is the measurement of this square?<br> A.075<br> B. 1.75<br> C. 0.34

Katena32 [7]

Answer:

0.75 in

Explanation:

The 1 inch measure has 16 divisions.

Find the measure of 1 division as: 1/16 = 0.0625 in

The side length of the square has 12 divisions

1 division = 0.0625 in

12 divisions = 0.0625*12 = 0.75 in

The correct answer choice is A. 0.75.

Answer choices B is incorrect because from the diagram, it is clear that the side length of this square is less that 1 inch.

Answer choice C is incorrect because 0.34 in will mean 0.34/0.0625 divisions. This is 5 divisions, yet the square side length covers 12 divisions.

7 0

3 years ago

A series of three direct shear tests has been conducted on a certain saturated soil. Each test was performed on a 2.375-inch dia

Pachacha [2.7K]

Answer:

Go to explaination for the details of the answer.

Explanation:

Angle of friction (friction angle) is a measure of the ability of a unit of rock or soil to withstand a shear stress. It is the angle (φ), measured between the normal force (N) and resultant force (R), that is attained when failure just occurs in response to a shearing stress (S).

The cohesion intercept is a used when we want to describe the shear strength soils. The definition is mainly derived from the Mohr-Coulomb failure criterion and it is used to describe the non-frictional part of the shear resistance which is independent of the normal stress.

Please check attachment to Determine the friction angle and cohesion intercept.

8 0

3 years ago