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Ludmilka [50]
2 years ago
12

. An experimental rocket plane lands on skids on a dry lake bed. If it’s traveling at 80.0 m/s when it touches down, how far doe

s it slide before coming to rest? Assume the coefficient of kinetic friction between the skids and the lake bed is 0.6.
Physics
1 answer:
kobusy [5.1K]2 years ago
5 0

Answer:

1. A substance that can be separated into two or more substances only by a chemical change is a(n) _____.

solution

element

mixture

compound

2.

Which of the following materials is a substance?

air

gasoline

stainless steel

silver

3.

The first figure in a properly written chemical symbol always is _____.

boldfaced

capitalized

italicized

underlined

4.

Which of the following represents a compound?

H

H-3

H2O

O-16

5. What do chemical symbols and formulas represent, respectively?

elements and compounds

atoms and mixtures

compounds and mixtures

elements and ions

Explanation:

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What part of the electromagnetic spectrum can be seen by humans
Amanda [17]

Answer:

Visible light

Explanation:

Electromagnetic spectrum is the classification of the electromagnetic waves according to their frequency/wavelength. In order from the shortest to the longest wavelength, we have

Gamma rays

X-rays

Ultraviolet

Visible light

Infrared

Microwaves

Radio waves

All these waves are invisible to human eye, except for the part referred as 'visible light'. The electromagnetic waves of this part of the spectrum are visible to human eye, and they appear as a different color depending on their wavelength. In particular, we have:

Violet: 380-450 nm

Blue: 450-495 nm

Green: 495-570 nm

Yellow: 570-590 nm

Orange: 590-620 nm

Red: 620-750 nm

4 0
2 years ago
Based on Schaffer's arguments in "The Value of a Sherpa Life," choose the statement
Tju [1.3M]

Answer:

Sherpas do work that is much more meaningful than the work other climbers do.

Explanation:

3 0
3 years ago
Define wheel and axle 4 example of wheel and axle​
natita [175]

Answer:

A system of two co-axial cylindersof different diameters which rotate together is called wheel and axle example; the door knob , knob of the tap ,screw driver,water tap

5 0
3 years ago
Can someone help me find the which direction is north and which is south on this solenoid?
arsen [322]

Explanation:

Now, looking down the solenoid tube determine what direction is the winding. If clockwise in relation to the positive wire then is the south pole, if anti-clockwise then is the north pole. So, to summarize the magnetic south pole is always clockwise in relation to the positive wire.

7 0
3 years ago
Can a 20 N force and 40 N force ever produce a resultant with magnitude of 27 N?
SVEN [57.7K]

Sure ,Let's find angle between forces

  • Vectors be A and B and resultant be R

\\ \sf\longmapsto R^2=A^2+B^2+2ABcos\theta

\\ \sf\longmapsto 27^2=20^2+40^2+2(20)(40)cos\theta

\\ \sf\longmapsto 729=400+1600+1600cos\theta

\\ \sf\longmapsto 729=2000+1600cos\theta

\\ \sf\longmapsto 1600cos\theta=-271

\\ \sf\longmapsto cos\theta=-0.169

\\ \sf\longmapsto \theta=cos^{-1}(-0.169)

\\ \sf\longmapsto \theta=80.2°

7 0
2 years ago
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