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marshall27 [118]
3 years ago
10

Help with these questions please?

Physics
1 answer:
serg [7]3 years ago
7 0

Answer:

7. 1.56

8. A curved line that slopes upward

Explanation:

7. The curve for quartz at the left side of the graph (400 nm) is just above the middle of the distance between 1.5 and 1.6, so is best approximated by 1.56.

___

8. The graph shows n vs. wavelength. The question asks about n vs. frequency. Frequency is inversely proportional to wavelengh, which means you need to describe the curve from right to left, rather than left to right. From right to left, the curve rises, so can be called "a curved line that slopes upward."

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La temperatura de cambio de estado, ¿Puede ser igual para todos los materiales? Justifica comparando dos materiales
Soloha48 [4]

Answer:

No.

Explanation:

Para darnos cuenta de esto tenemos que pensar en lo siguiente:

Pensemos en un vaso de vidrio, lleno de agua hasta la mitad, la otra mitad puede ser manteca derretida

Si metemos el vaso en la heladera durante un par de horas, (sabemos que la manteca en la heladera se mantiene sólida) veremos que la manteca se solidificó en la parte de arriba, mientras que el agua sigue líquida.

Entonces encontramos dos compuestos con distintas temperaturas para cambio de fase, pero materiales es más específico, y puede referirse a materiales puros.

Entonces vamos a dos metales:

Primero tenemos una pieza de hierro y una de mercurio en el congelador (supongamos que ambas están a 0°C).

Ahora los sacamos del congelador y los dejamos llegar a temperatura ambiente.

Como bien sabemos, el mercurio es líquido a temperatura ambiente, entonces el mercurio va a sufrir un cambio de fase

Ahora pensemos en el hierro; claramente va a seguir siendo sólido a temperatura ambiente, entonces podemos ver dos materiales cuyo cambio de fase de sólido a líquido ocurre en distintas temperaturas, por lo que podemos concluir que no, la temperatura de cambio de estado no puede ser igual para todos los materiales, y esto se debe a que la estructura atómica de todos los materiales es diferente.

8 0
3 years ago
What is epsilon zero and why does it come into use, particularly in the case of Gauss's Law?
Paha777 [63]
<span>Epsilon zero is permittivity of free space means how much air or vacuum permits electric field to travel from one charge to other.It is constant in the coulomb law. This allow Gauss's a lot easier to solve rather than using K</span>
5 0
4 years ago
Find the y-component of this vector:73.3,12.0m. Remember, angles are measured from the +x axis.
Rainbow [258]

Answer:

11.5 meters

Explanation:

73.3°, 12.0m

The y-component is the magnitude of the vector times the sine of the angle measured from the +x axis.

y = 12.0 sin (73.3°)

y = 11.5

The y-component is 11.5 meters.

7 0
3 years ago
What is the average kinetic energy of protons at the center of a star where the temperature is 190e7K?
valkas [14]
I'm pretty sure that you put incorrect temperature number, since the number of temperature that you currently given does not make any sense.

Insert your correct temperature in this equation :
Ek = (3/2)kT

Hope this helped you out 
4 0
4 years ago
A 30 cm-long wire carrying a current of 0.5 A is immersed in a uniform magnetic field of 4 T. If the magnetic field is oriented
Lera25 [3.4K]

Answer:

Magnetic force, F = 0.6 N

Explanation:

It is given that,

Length of the wire, L = 30 cm = 0.3 m

Current carrying in the wire, I = 0.5 A

Uniform magnetic field, B = 4 T

To find,

The magnetic force

Solve,

A force is exerted by the wire in the magnetic field that is given by :

F=ILB\ sin\theta

Here, \theta=90

F=ILB

F=0.5\ A\times 0.3\ m\times 4\ T

F = 0.6 N

Therefore, the magnetic force exerted by the wire in the magnetic field is 0.6 N

5 0
3 years ago
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