<u>Complete Question:</u>
Which of the following is not a characteristic of electromagnetic waves?
a. they can travel through a vacuum.
b. they can travel at various speeds through any one material.
c. they can be refracted.
d. they can be reflected.
<u>Correct Option:</u>
"They can travel at various speeds through any one material" is not a characteristic of electromagnetic waves.
<u>Explanation:</u>
It is a form of energy generated by interference from the oscillating magnetic and electric recorded. So we may conclude that it is created by moving electric charged particles through the vacuum so matter. This is a wave in which the two vectors vibrate each other perpendicularly and in the direction of the wave. Electromagnetic waves which involve gamma-rays, x-rays, ultraviolet rays, infrared-rays, microwaves and radio-waves can be featured by:
- They may pass through the vacuum.
- They are allowed to move through the matter and are reflectable.
- They can pass through all of the material at the same pace. This means there is still constant speed of light, which is, they can be refracted.
Answer:
The molar mass for the solute is 180.8 g/mol
Explanation:
We apply the colligative property of freezing point depression.
The formula is T° freezing pure solvent - T° freezing solution = Kf . m
T° freezing pure solvent - T° freezing solution → ΔT
Kf = 1.86 °C/m
m is molality. We must determine with data given.
Molality are the moles of solute contained in 1 kg of solvent
0° - (-1.8°C) = 1.86 °C/m . m
1.8°C / 1.86 m/°C = m → 0.968 mol/kg
We multiply the molality by kg of solute, to determine the moles
100 g . 1kg/1000 g = 0.1kg → 0.968 mol/kg . 0.1 kg = 0.0968 moles
To find the molar mass we make g/ mol → 17.5 g / 0.0968 mol =
180.8 g/mol
D. squeezing of the esophagus
Explanation:
Write the following sentences and give the function of each underlined word.
a. Yellow describes snake and crawled tells of an action.
b. Shoaib is the name of a person and large describes the company.
c. Tap is the name of a thing; yesterday tells when it was leaking (helps describe the action).
d. Me stands in place of a noun (the person speaking) and morning is the name given to the early
part of the day.
e. And joins two parts of the sentence; are fed tells of an action (continuing).
f. Saw tells of a past action; in shows the relationship between peacock and forest.
g. Oh! Shows a feeling or emotion; new describes the car.
Answer:
Particles are dissolved.
light beam passes through invisibly
Explanation:
Some of the characteristics of true solutions are as follows;
Particles are dissolved.
light beam passes through invisibly
A solution simply refers to a homogeneous mixture of two or more substances.