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KiRa [710]
3 years ago
9

Is the wavelength comparable to the size of atoms?

Physics
1 answer:
Helen [10]3 years ago
5 0

It totally depends on what kind of wave you're talking about.

-- a sound wave from a trumpet or clarinet playing a concert-A pitch is about 78 centimeters long ... about 2 and 1/2 feet.  This is bigger than atoms.

-- a radio wave from an AM station broadcasting on 550 KHz, at the bottom of your radio dial, is about 166 feet long ... maybe comparable to the height of a 10-to-15-story building.  This is bigger than atoms.

-- a radio wave heating the leftover meatloaf inside your "microwave" oven is about 4.8 inches long ... maybe comparable to the length of your middle finger.  this is bigger than atoms.

-- a deep rich cherry red light wave ... the longest one your eye can see ... is around 750 nanometers long.  About 34,000 of them all lined up will cover an inch.  These are pretty small, but still bigger than atoms.

-- the shortest wave that would be called an "X-ray" is 0.01 nanometer long.     You'd have to line up 2.5 billion of <u>those</u> babies to cover an inch.  Hold on to these for a second ... there's one more kind of wave to mention.

-- This brings us to "gamma rays" ... our name for the shortest of all electromagnetic waves.  To be a gamma ray, it has to be shorter than 0.01 nanometer.

Talking very very very very roughly, atoms range in size from about 0.025 nanometers to about 0.26 nanometers.

The short end of the X-rays, and on down through the gamma rays, are in this neighborhood.

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A bicycle racer is going downhill at 11.0 m/s when, to his horror, one of his 2.25 kg wheels comes off when he is 75.0 m above t
alex41 [277]

Answer:

a.) Speed V = 29.3 m/s

b.) K.E = 1931.6 J

Explanation: Please find the attached files for the solution

4 0
3 years ago
What is the relationship between Avogadro's number and a mole?
Shtirlitz [24]

Answer:

A. There are 6.02 x 1023 items in a mole, which equals Avogadro's

number

Explanation:

The mole of a substance is

8 0
3 years ago
Which of the following descriptions best describes all of the factors that need to be considered when
SSSSS [86.1K]

All of the factors that need to be considered when determining an object's terminal velocity are the object's weight and area it presents, as well as air density.

<em>option </em><em>C </em><em>is the correct answer</em>

<h3>What is terminal velocity?</h3>

Terminal velocity is obtained when the speed of a moving object is no longer increasing or decreasing. That is the object's acceleration (or deceleration) is zero.

Mathematically, the formula for terminal velocity is given as;

V = √(2mg)/(ρAC)

where;

  • m is the mass of the falling object
  • g is the acceleration due to gravity
  • ρ is the density of the fluid through which the object is falling
  • A is the projected area of the object
  • C is the drag coefficient

Thus, the variables to consider in determining terminal velocity of an object incudes the area, density of air, mass, etc.

Learn more about terminal velocity here: brainly.com/question/25905661

#SPJ1

6 0
1 year ago
A fixed source charge particle of 4.1 nC and a second particle with a charge 2.4 nC are separated by a distance of 3.5 cm. What
vodka [1.7K]

Answer:

a. 2.53  μJ b. It will move away

Explanation:

a. What is the electric potential energy between the particles?

The electric potential energy U = kq₁q₂/r where k = 9 × 10⁹ Nm²/C², q₁ = 4.1 nC = 4.1 × 10⁻⁹ C, q₂ = 2.4 nC = 2.4 × 10⁻⁹ C and r = distance between charges = 3.5 cm = 3.5 × 10⁻² m.

Substituting the values of the variables into U, we have

U = kq₁q₂/r²

U =  9 × 10⁹ Nm²/C² × 4.1 × 10⁻⁹ C × 2.4 × 10⁻⁹ C/3.5 × 10⁻² m

U = 88.56 × 10⁻⁹ Nm²/3.5 × 10⁻² m

U = 25.3  × 10⁻⁷ Nm

U = 2.53  × 10⁻⁶ Nm

U = 2.53  × 10⁻⁶ J

U = 2.53  μJ

b. And if the second particle is released will it move forward or away from the source charge.

It will move away from the source charge since they have the same sign of charge. Since, opposite charges repel.

6 0
3 years ago
What happens too baking soda when you heat it up?
Fantom [35]
Salutations!

What happens to baking soda when you heat it up!

When you heat up baking soda, it loses carbon dioxide which tends to crest bubbles. This is what makes it quite light and fluffy.

Hope I helped :D
4 0
3 years ago
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