1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
KiRa [710]
3 years ago
7

A neon sign _________ light. A. emits B. filters C. reflects D. transmits

Physics
1 answer:
Allisa [31]3 years ago
8 0
A, emits light. Go to a shop with a neon light, it'll always glow (the light, not the shop)

You might be interested in
Which of the following is group 1? a. alkali metals b. alkaline earth metals c. halogens d. transition metals
Elanso [62]
The answer is A. Alkali metals
4 0
3 years ago
Read 2 more answers
Discuss the phase change condition due to reflection of light from a surface. Summarize equations of interference for thin film.
Dmitrij [34]

Answer:

if this surface has a higher index than in the medium where the light travels, the reflected wave has a phase change of 180º

Explanation:

When a ray of light falls on a surface if this surface has a higher index than in the medium where the light travels, the reflected wave has a phase change of 180º this can be explained by Newton's third law, the light when arriving pushes the atoms of the medium that is more dense, and these atoms respond with a force of equal magnitude, but in the opposite direction.

When the fractional index is lower than that of the medium where the reflacted beam travels, notice a change in phase.

Also, when light penetrates the medium, it modifies its wavelength

              λ = λ₀ / n

We take these two aspects into account, the condition for contributory interference is

            d sin θ = (m + 1/2) λ

for destructive interference we have

            d sin θ = m λ

in general this phenomenon is observed at 90º

           2 d = (m +1/2) λ° / n

          2nd = (m + ½) λ₀

5 0
3 years ago
A supply bag is dropped from a rescue plane. After the bag falls for 3.2 seconds , what is the velocity of the bag?
loris [4]

Answer: -31.36 m/s

Explanation:

This is a problem of motion in one direction (specifically vertical motion), and the equation that best fulfills this approach is:

V_{f}=V_{o}+a.t  (1)

Where:

V_{f} is the final velocity of the supply bag

V_{o}=0 is the initial velocity of the supply bag (we know it is zero because we are told it was "dropped", this means it goes to ground in free fall)

a=g=-9.8m/s^{2} is the acceleration due gravity (the negtive sign indicates the gravity is downwards, in the direction of the center of the Earth)

t=3.2s is the time

Knowing this, let's solve (1):

V_{f}=0+(-9.8m/s^{2})(3.2s)  (2)

Finally:

V_{f}=-31.36m/s  Note the negative sign is because the direction of the bag is downwards as well.

8 0
3 years ago
What would you do to increase resistance
ratelena [41]

Answer:

If this is electrical currents , make the wire longer, smaller diameter wires, heat it up

6 0
2 years ago
Read 2 more answers
The phase change in which a substance changes from a gas directly to a solid is
vlabodo [156]
<span>Condensation is the change of the substance from liquid to solid phase. Example of this is the formation of ice. Vaporization is the change of substance from liquid to gas phase. Example of this is the boiling of water. Deposition is the change of a substance from gas to solid phase. Example of this is the formation of ice on a winter day. Sublimation is the change of a substance from solid to gas phase. Example of this is dry ice. The answer is letter C.</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which is the satellite Terra able to do?
    6·2 answers
  • A parallel plate flow chamber is being designed to study the adhesion of leukocytes to endothelium. The channel width is 2cm; th
    11·1 answer
  • How to calculate displacement in physics?
    12·2 answers
  • Car A has a mass of 1,200 kg and is traveling at a rate of 22km/hr. It collides with car B has a mass of 1,900 kg and is traveli
    9·1 answer
  • What minimum heat is needed to bring 100 g of water at 50 â c to the boiling point and completely boil it away? the specific hea
    15·1 answer
  • What happens to light that shines on an object but is not transmitted?
    9·1 answer
  • Can someone please answer this ? it doesn’t make sense to me
    15·1 answer
  • 1) Little Timmy wants to measure how tall his house is. He doesn’t have a tape measure but does have a stopwatch. He recruits Bi
    7·1 answer
  • A copper calorimeter of mass 120g contains 70g of water and 10g of ice at 0°C. What mass of steam at 100°C must be passed into t
    14·1 answer
  • Provide an explanation tok please 80 points!!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!