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garri49 [273]
3 years ago
8

Pls answer I will make brainlist

Physics
1 answer:
Semenov [28]3 years ago
3 0
Reflection: a change in direction of a wave at a boundary between two different media.
sentence: i saw my reflection in the mirror.

refraction: the bending of light as it passes from one transparent substance into another.
sentence: when light goes through glass, it’s a refraction.

diffraction: the bending of waves around the corners of an obstacle.
sentence: spaced tracks on a CD act as a diffraction.

absorption: the process or action by which one thing absorbs or is absorbed by another.
sentence: heat waves hitting the beach usually give most of their energy to the sand.

interference: when two waves lay on each other and their energies are either added together or cancelled out.
sentence: interference waves can be observed with all types of waves.

standing wave: two waves moving in opposite directions. they both have the same amplitude or frequency.
sentence: plucking the string of a guitar is an example of standing waves.

resonance: increased amplitude that occurs when the frequency of a force is equal or close to a natural frequency.
sentence:a buzz in your car that only occurs at a certain speed is an example or resonance.
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Which of the following is a good electrical conductor?
trasher [3.6K]
Greetings!

The answer would be ~ Gold. All metals are good conductors. But some however may be slower than others. Gold is not that great of a conductor, but is the best choice on here.

Hope this helps!

~DL
4 0
4 years ago
The mass of a copper atom is 1.06 10-25 kg, and the density of copper is 8 920 kg/m3 . (a) determine the number of atoms in 1 cm
Andreyy89

Mass of copper atom is 1.06\times 10^{-25}kg and density of copper atom is 8920 kg/m^{3}.

First calculate the volume from density and mass as follows:

V=\frac{m}{d}=\frac{1.06\times 10^{-25} kg}{8920 kg/m^{3}}=1.188\times 10^{-29}m^{3}

Now, convert m^{3} to cm^{3},

1 m^{3} = 10^{6} cm^{3}

Thus,

1.188\times 10^{-29}m^{3}=1.188\times 10^{-23}cm^{3}

Now,

1.188\times 10^{-23}cm^{3}\rightarrow 1.06\times 10^{-25}kg

Thus,

1cm^{3}\rightarrow \frac{1.06\times 10^{-25}kg}{1.188\times 10^{-23}kg}=0.00892 kg

or,

m=8.92 g

The molar mass of copper is 63.54 g/mol thus, number of moles can be calculated as:

n=\frac{m}{M}=\frac{8.92 g}{63.54 g/mol}=0.1403 mol

Now, in 1 mol of Cu there are 6.023\times 10^{23} atoms, number of atoms in 0.1403 mol will be:

N=0.1403\times 6.023\times 10^{23}=8.45\times 10^{22} atoms

8 0
3 years ago
During exponential growth, the rate of growth
alekssr [168]
The answer would be D
3 0
4 years ago
What acceleration reaches a car of Formla 1 of 650 Kg of mass whose engine starts with a force of 6000 N
PtichkaEL [24]
Hope this helps

650 x 6000= 3900000
4 0
3 years ago
How does microwave technology cook food?
Y_Kistochka [10]

Answer:

By heating all the water molecules which changes the thermal energy of the food

Explanation:

3 0
2 years ago
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