Water _____.a. has a pH value of 0
B: expands when it freezes
C: is less dense than ice
D: dissolves in most substances

Answers

Answer 1

Answer: Water does not have a pH of 0, its actually 7. Also, it is not less dense than ice. Lastly, it does not dissolve in most substances, its the complete opposite. As its a solvent, not a solute.

Answer: B

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Which two wire properties would provide the greatest resistance to the flow of a current?

Answers

Properties of wire, and things you can
do to it to make its resistance high:

-- Thickness. Make it as thin as a hair on a mosquito's leg.

-- Length. Make it long enough to go around the Earth.

-- Resistivity of the material. Make the wire out of glass or wood.

if this is science then I believe one is CONDUCTION not sure about second one but it may be something to do with the wires look and structure e.g matieral

An electromagnetic wave traveling through a vacuum has a wavelength of .15 meter. What is the period of this electromagnetic wave?

Answers

Tools we'll need:
Speed of EM wave in vacuum = 3 x 10⁸ meters per second.
Frequency = (speed) / (wavelength)
Period = 1/frequency

Period = (wavelength) / (speed) = (0.15) / (3 x 10⁸) = 0.5 nanosecond

( "nano..." = 10⁻⁹ )

If a source of sound waves is rapidly approaching a person, the sound heard by the person appears to havea. a period higher than the original period.
b. a pitch lower than the original pitch.
c. an amplitude lower than the original amplitude.
d. a frequency higher than the original frequenc

Answers

Correct answer choice is:

D. A frequency higher than the original frequency.

Explanation:

This is a true case of Doppler's effect. The Doppler effect can be defined as the effect originated by a traveling source of waves in which there is a visible higher variation in pulse for observers towards what the source is progressing and a visible descending shift in rate for observers from what the source is dropping.

Answer:

DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD It is D

Explanation:

In which layer does erosion take place? And why?

Answers

In the Earths Crust. Because, the crust includes our land and, erosion occurs on land.

Gaps in rock layers that develop when agents of erosion remove existing rock layers are known as unconformities.
Hope this concluded your answer and was useful!

The scientific revolution s advances in knowledge about the physical world led philosophers and other thinkers to believe that if reason structured the physical world, then reason might also be found in the world of human activity and government. a.true
b.false

Answers

The answer for the given statement above would be option A. TRUE. It is true that the scientific revolution's advances in knowledge about the physical world led philosophers and other thinkers to believe that if reason structured the physical world, then reason might also be found in the world of human activity and government. Hope this helps.

a is is correct or true

Select the type of volcanoes that frequently erupt violently?A. Cinder cone

B. Stratovolcano

C. Shield volcano

* it’s not B