List the characteristics properties of all waves. at what speed do electromagnetic waves travel in a vacuum
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Electromagnetic waves travel at in vacuum
The fundamental properties that can be attributed to waves are;
- reflection
- refraction
- diffraction
- interference.
Other properties are ;
- wavelength
- frequency
- amplitude.
- A waves can be regarded as one that disturb the transfers energy.
- what all this electromagnetic waves has in common is their ability of them to travel in the vacuum with the same speed.
- Their speed in the vacuum is 300,000,000 metres per second which is the speed of light.
Electromagnetic radiation can be regarded as radiation that has waves of the electromagnetic field, which propagate through the space, and it moves along with electromagnetic radiant energy.
- Electromagnetic waves that are part of electromagnetic spectrum are:
- radio waves
- microwaves
- infrared light
- ultraviolet
- X-rays,
- gamma rays.
- Wavelength can be regarded as distance that exist between identical points i.e the adjacent crests of the adjacent cycles in that waveform
- Frequency can be explained as the rate of vibration of the wave electromagnetic field per seconds.
- The amplitude of wave can be regarded as distance from the centre line to the bottom of a trough, or to the top of a crest.
Therefore, electromagnetic waves travel at 300,000,000 metres per second in vacuum.
299,792,458 meters per second
in vacuum.
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Anthony walks to the pizza place for lunch. he walk 1 km east, then 1 km south and then 1 km east again. what distance did he cover? what was his displacement?
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at the bottom of each page
at the end
in the appendix
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Answer:
at the end of the page
Explanation:
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Answer:
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Answer:
Primero, sabemos que la densidad de el oro es:
Densidad = 19.3 g/cm^3
Sabemos que nuestro metal tiene una masa de 0.75 kg, y un volumen de 340 cm^3.
Primero deberíamos reescribir la masa en gramos, pues la densidad está escrita en gramos.
Sabemos que:
1 kg = 1000g
Entonces:
0.75 kg es 0.75 veces 1000g, esto nos da:
0.75kg = 0.75*(1000g) = 750g
Entonces tenemos:
masa = 750g
volumen = 340cm^3
Ahora debemos recordar que:
densidad = masa/volumen
Entonces la densidad de este metal es:
densidad = 750g/340cm^3 = 2.21 g/cm^3
Si la comparamos con la densidad del oro, podemos ver que esta es mayor.
Entonces podemos concluir que este metal no es oro.
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To solve this question, we need to use the component method and split our displacements into their x and y vectors. We will assign north and east as the positive directions.
The first movement of 25m west is already split. x = -25m, y = 0m.
The second movement of 45m [E60N] needs to be split using trig.
x = 45cos60 = 22.5m
y = 45sin60 = 39.0m
Then, we add the two x and two y displacements to get the total displacement in each direction.
x = -25m + 22.5m = -2.5m
y = 0m + 39.0m
We can use Pythagorean theorem to find the total displacement.
d² = x² + y²
d = √(-2.5² + 39²)
d = 39.08m
And then we can use tan to find the angle.
inversetan(y/x) = angle
inversetan(39/2.5) = 86.3
Therefore, the total displacement is 39.08m [W86.3N]
Answers
ΔG = ΔH – TΔS
Answer:
Melting of ice is an endothermic process, meaning that energy is absorbed. When ice spontaneously melts, ΔH (change in enthalpy) is "positive". ΔS (entropy change) is also positive, because, becoming a liquid, water molecules lose their fixed position in the ice crystal, and become more disorganized. ΔG (free energy of reaction) is negative when a reaction proceeds spontaneously, as it happens in this case. Ice spontaneously melts at temperatures higher than 0°C. However, liquid water also spontaneously freezes at temperatures below 0°C. Therefore the temperature is instrumental in determining which "melting" of ice, or "freezing" of water becomes spontaneous. The whole process is summarized in the Gibbs free energy equation:
Explanation: