Why are some electromagnetic waves harmful to you but others are not?

Answers

Answer 1

Answer: Answer
They have different frequencies.

Explanations
Some electromagnetic wave have high frequency than others. hose with high frequency are more harmful than those with low frequency.

Waves with high frequency have a higher penetrating power and they can kill cells if exposed to it. This makes them harmful.

Answer 2

Answer: Because for example a lightning bolt is an electromagnetic wave. Lighting bolts can hurt you or even kill you. But others waves cant harm you.
Hope this helps

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You travel 25 meters east and then travel 48 meters south. What is your total displacement

Answers

Answer:

54.1 m at $-62.5^(\circ)$ (south of east)

Explanation:

Displacement is a vector connecting the initial position with the final position of motion.

In this problem, the motion consists of two parts:

- A first movement 25 m east

- A second movement 48 m south

We can therefore write a vector representing the displacement as

$d=(25i-48j)$

where i is the unit vector indicating the east direction and j the unit vector indicating the north direction.

Therefore, the total displacement is just the magnitude of this vector:

$d=√(25^2+(-48)^2)=54.1 m$

And the direction is given by

$\theta=tan^(-1)((d_y)/(d_x))=tan^(-1) ((-48)/(25))=-62.5^(\circ)$

94. While you are traveling in a car on a straight, level interstate highway at 90 km/h another car passes you in the same direction, its speedometer reads 120 km/h (a) What is your velocity relative to the other driver? (b) What is the other car's velocity relative to you?

Answers

Answer:

a) $v_{A_(B)}$ = -30 m/s

b) $v_{B_(A)}$ = 30 m/s

Explanation:

Consider the car A travel at a velocity of $v_(A)$ = 90 km/h and the car B travel at the velocity of $v_(B)$ = 120 km/h. As the velocity of the car B is greater than the car A, So it cross the car A. Consider The velocity of car A relative to car B is $v_{A_(B)}$ and it is equal to the velocity of car A minus the velocity of car B.

$v_{A_(B)}$ = $v_(A)$ - $v_(B)$

$v_{A_(B)}$ = 90 - 120

$v_{A_(B)}$ = -30 m/s

Consider The velocity of car B relative to car A is $v_{B_(A)}$ and it is equal to the velocity of car B minus the velocity of car A.

$v_{B_(A)}$ = $v_(B)$ - $v_(A)$

$v_{B_(A)}$ = 120 - 90

$v_{B_(A)}$ = 30 m/s

What is bacteria bigwig

Answers

A bacteria bigwig is a chemical found in all living things and therefore an indicator of bacteria

I hope that's help !

A planet in our solar system is located far from the sun. Describe the size and composition of this planet.

Answers

Pluto or Neptune It's one of those

Which can be used to determine if an electromagnet is working? A. compass B. a permanent magnet C. a switch D. galvanometer

Answers

The device used to datermine a electromagnet is a /compass

Acceleration can bea change in speed and.........?

Answers

Acceleration is any change in speed or direction of motion.

Speeding up, slowing down, or moving along a curve are all accelerations.

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