Physics: SOMEONE HELP PLEASE SORRY Why can you not see a laser shining through the room, but you can see it as a red dot on the wall?

SOMEONE HELP PLEASE SORRY Why can you not see

Ответ:

791197

09.02.2022

Just red light is reflected. Even if you shine a red laser at a blue piece of paper, only red light is reflected. ... The dot you see will probably always be red. If you do this in a bright room, you might trick yourself.

Explanation:

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Ответ:

itsstaytay200

28.03.2021

Physics

60m/s

Explanation:

We are given that

Speed of car after 5 sec, v=40m/s

Acceleration ,a= -4m/s^2

We have to find the initial speed of car.

We know that

Acceleration, a= $\frac{v-u}{t}$

Where v=Final speed

u=Initial speed

Using the formula

$-4=\frac{40-u}{5}$

$-4\times 5=40-u$

-20=40-u

u=40+20

u=60

Hence, initial speed of car=60m/s

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SOMEONE HELP PLEASE SORRY Why can you not see a laser shining through the room, but you can see it as a red dot on the wall?

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