with the same generator, so the only factor for producing
the slectric field is only the speed. The faster the rotational speed of the
generator the greater it produce electric field. So the sequence is 3000 rpm
< 3200 rpm < 3400 rpm < 3600 rpm
Answer:
bend toward the normal line
Explanation:
When light passes from a less dense to a more dense substance, (for example passing from air into water), the light is refracted (or bent) towards the normal. In your question the light is moving from rarer to denser medium
Upon refracting from air to glass, light will bend towards the normal line, reducing the angle of incidence due to the principle of Snell's Law, which governs how light refracts between media. However, the exact refracted angle cannot be determined without the refractive indices of air and glass.
According to the Law of Refraction, also known as Snell's Law, light changes direction when it passes from one medium to another due to a change in speed, which is determined by the mediums' refractive indices. When light passes from air (a medium with a lower refractive index) into glass (a medium with a higher refractive index), it bends towards the normal line, the imaginary line perpendicular to the surface at the point of incidence.
Given that the angle of incidence is 30 degrees, following the formula of Snell's law: n₁ sin θ₁ = n₂ sin θ₂ where n₁ and n₂ are the refractive indices of air and glass, and θ₁ and θ₂ are the angles of incidence and refraction, we could solve for θ₂ which will be the angle of refraction in glass. However without information of refractive indices of air and glass, an exact angle cannot be determined.
In summary, the light ray will bend towards the normal upon entering the glass, hence decreasing the angle of incidence, according to the Law of Refraction or Snell's Law.
#SPJ3
-Toward the normal
-Away from normal
-Doesn’t bend
2. Which way does light bend when traveling from glass to air?
-Toward the normal
-Away from normal
-Doesn’t bend
3.Of your three mystery materials, in which will light travel the fastest? Why?
Answer:
1: toward the normal
2:away from normal
3: red because the index of refraction ( the ratio of the speed of light in a vacuum to the speed of light in a material) is increased for the slower moving waves
b. poured concrete
c. expanded polyurethane
d. asbestos shingles
Answer:
c. expanded polyurethane
Explanation:
Thermal performance of a building fabric is measured in terms of heat loss and is expressed as U-value or R-value. U-value is the rate of heat transferred through a structure divided by the difference in temperature across the structure with a unit of measurement of W/m²K.You can calculate the U-value of a by getting the reciprocal of the sum of thermal resistances , R, making the building material.
If you have the value of R, then U=1/R
Material size R U
plywood 1" 1.25 0.8
Poured concrete 2" 0.99 1.010
Expanded polyurethane 1" 6.5 0.1538
Asbestos shingles 1" 0.03 33.33
The material with lowest U-value is expanded polyurethane
the bell, the balloon
contracted
expanded
When the pump removed the air in the bell, the balloon expanded.
Option: B
Explanation:
In order to construct our own environment in the glass jar known as bell jar system, which can be used to explore and consider our larger environment on Earths, for an instance. Here a glass jar that hinges on an airtight rubber basis i.e seals appropriately. At the top of the jar, a bung is connected to it which passed via a metal tube. It has an adjacent flexible tube that goes to a hand vacuum pump and the best hand-powered pump was made with a wine preserver.
When the pump extracts the air from the bell jar, the pressure inside the balloon naturally decreases. The balloon usually has a air pressure around it, which restricts its size, but when this air is extracted and the pressure around it decreases the gas in the balloon will expand and the balloon seems to be inflating. When you release the air back into the bell jar, it will once again compress back to its actual size.