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Digiron [165]
2 years ago
7

You position two plane mirriors at right angles to each other a light ray strikes one mirrior at an angle of 60 to the normal an

d reflects towards the second mirrior what is the angle of reflection off the second mirrior
Physics
1 answer:
Dafna1 [17]2 years ago
4 0

Answer:

30 degrees

Explanation:

Reflects off of mirror 1  at   60 degrees....this makes it incident to second mirror at 30 degrees ....then angle of reflection equals this angle of incidence = 30 degrees

See atached diagram

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(b) A car of mass 3000 kg travels at a constant velocity of 5.0 m/s.
Tamiku [17]

Answer:

16.7 s

Explanation:

T= <u>Vf - Vo</u>          a= <u>F</u>

         a                    m

4,500 / 3000 = 1.5 (a)

30 - 5 / 1.5(a) = 16.7 s      

4 0
3 years ago
According to the principle of faunal succession, what must be true of the fossils on a layer below? Now
Firdavs [7]
It means that they were set earlier therefor they are older.
7 0
2 years ago
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What elements compose the stars and planets in the universe
Savatey [412]

Well hydrogen would be the main element, as a process called nuclear fusion with both helium and hydrogen atoms occurs within stars. And planets are the products of dead stars that have burned through their supplies of hydrogen, helium, and carbon. Planets are a product of this.

6 0
3 years ago
Amber asked her roommate to turn down the radio because she was trying to study. Her roommate had increased the volume from a vo
Blizzard [7]

Answer:

Difference threshold or also Just Noticeable Difference

Explanation:

The above mentioned case between room mates, where one room mate was able to detect a minute change in volume shows an instance of the difference threshold.

Difference threshold can be defined as stimulation at its minimum level that can be detected by an individual almost 50 % of the times.

It is the lowest possible level of sound that is detectable by a person.

That is what happened in the mentioned case that when the volume was increased from 14 to 15, Amber was able to detect it.

7 0
3 years ago
A dog is trained to sit and shake hands these traits are most likely
antiseptic1488 [7]
Taught  not inherited

4 0
3 years ago
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