NO LINK plsssss just answer

Please help me it’s for science I only have a few minutes

7nadin3 [17]

Answer:

Rocks

Explanation:

I am not sure tho bc they are made out of coal and I think coal is a kind of rock

3 0

2 years ago

Read 2 more answers

Technician A says that the first step in diagnosing engine condition is to perform a thorough visual inspection. Technician B sa

mojhsa [17]

Answer:

Technician A

Explanation: Technician A is correct. Technician B is wrong, as an oil leak can trickle down onto other engine components, away from where the leak actually is.

5 0

3 years ago

While driving down the highway, your car must overcome the forces of friction and air resistance in order to keep the car moving

ElenaW [278]

Answer:

Efficiency of the engine equals 20%

Explanation:

We know that when the car moves it must do work against the resisting forces to keep moving and this work is spend as energy by the engine to keep the car moving.

we know that

$Work=Force\times Displacement$

Thus to keep the car moving for 100,000 meters the theoretical work that requires to be done equals

$Work=560N\times 100,000m=56\times 10^{6}Joules$

Now the actual energy spend by the car equals the energy spend by burning 2.8 gallons of gasoline.

Thus the energy produced by burning 2.8 gallons of gasoline equals

$2.8\times 100\times 10^{6}=280\times 10^{6}Joules$

Thus the efficiency is calculated as

$\eta =\frac{56\times 10^{6}}{280\times 10^{6}}\times 100\\\\\therefore \eta =20percent$

5 0

3 years ago

How to connect the wind turbines to the grid? Give advantages and disadvantages to your answer.

taurus [48]

Answer:

Electricity from the wind turbine generator travels to a transmission substation where it is converted into extremely high voltage, between 155,000 and 765,000 volts, for long distance transmission on the transmission grid. This grid comprises a series of power lines that connect the power sources to demand centers.The advantages of wind energy are more apparent than the disadvantages. The main advantages include an unlimited, free, renewable resource (the wind itself), economic value, maintenance cost, and placement of wind harvesting facilities.

7 0

2 years ago

Given the front and right views, create an AutoCAD isometric of the object. Save the drawing as lab5c.dwg. Grid size is 10mm. Yo

ki77a [65]

Given the front and right views, create an AutoCAD isometric of the object. Save the drawing as lab5c.dwg. Grid size is 10mm. You may approximate the location of the hidden line as long as it is consistent with the other view is given below

Explanation:

1.Use CTRL-C to copy the lines to the Windows clipboard. Go to the 2D drawing and give the PASTESPEC (Paste Special) command. This will paste an image of the selected geometry into the other drawing. SInce it is an image and not AutoCAD entities the image quality will be limited.

2.Isometric drawing in AutoCAD 2014 and older versions:

At first, you need to change your snap settings to isometric. Type DS on the command line and press enter. Drafting settings window will pop up from this window select snap and grid tab and make sure Isometric snap radio button is checked.

3.To Display a Preset 3D View

Click View tab Views panel View Manager. Find. The View tab is not displayed by default, so an alternative method is to enter VIEW at the Command prompt. You can also employ the ViewCube in the top-right corner of the drawing area.

Select a preset view (Top, Bottom, Left, and so on).

4.If you aren't in model space, double-click inside the viewport to enter model space.

Go to Home tab > Modify panel (expanded)> Change Space to start the CHSPACE command.

At the prompt, select one or more objects to move.

Press Enter to end selection and the command. AutoCAD moves the selected objects to the other space.

5.

4 0

3 years ago