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3 years ago

Where would you encounter each portion of the spectrum in your daily life

Physics

2 answers:

Irina18 [472]3 years ago

5 0

Radio ... listening to the news in the morning.

Infrared ... when I make the toast.

Visible ... admiring the beautiful scenery on my way to school.

Ultraviolet ... the sun shining on me while I'm walking to school.

X-rays ... when I go to the dentist after school and he takes some new pictures of my crazy bite.

Gamma rays ... never, thank goodness. They're coming from the sun, but the air soaks up almost all of them, so they never reach me. That's lucky, because they're dangerous.

quester [9]3 years ago

4 0

Answer: Al your a boomer your 90 lol

Explanation:

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A car is traveling at 15 m/sm/s . Part A How fast would the car need to go to double its kinetic energy

GREYUIT [131]

Answer:

21.21 m/s

Explanation:

Let KE₁ represent the initial kinetic energy.

Let v₁ represent the initial velocity.

Let KE₂ represent the final kinetic energy.

Let v₂ represent the final velocity.

Next, the data obtained from the question:

Initial velocity (v₁) = 15 m/s

Initial kinetic Energy (KE₁) = E

Final final energy (KE₂) = double the initial kinetic energy = 2E

Final velocity (v₂) =?

Thus, the velocity (v₂) with which the car we travel in order to double it's kinetic energy can be obtained as follow:

KE = ½mv²

NOTE: Mass (m) = constant (since we are considering the same car)

KE₁/v₁² = KE₂/v₂²

E /15² = 2E/v₂²

E/225 = 2E/v₂²

Cross multiply

E × v₂² = 225 × 2E

E × v₂² = 450E

Divide both side by E

v₂² = 450E /E

v₂² = 450

Take the square root of both side.

v₂ = √450

v₂ = 21.21 m/s

Therefore, the car will travel at 21.21 m/s in order to double it's kinetic energy.

8 0

3 years ago

Liquid droplets that fall from the sky are?<br> A) rain<br> B)snow<br> C) sleet <br> D) hail

alukav5142 [94]

The answer is a)rain

6 0

3 years ago

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A motorcyclist changes the velocity of his bike from 20.0 meters/second to 35.0 meters/second under a constant acceleration of 4

Fiesta28 [93]

35-20 = 15m/s difference
15/4 = 3.75 seconds

4 0

3 years ago

Jason applies a force of 4.00 newtons to a sled at an angle 62.0 degrees from the ground. What is the component of force effecti

kaheart [24]

You want to draw a free body diagram of the forces on the sled in the horizontal x-direction.

If you visualize the system in an x-y coordinate plane, the force along the x-direction is the angle it makes with the x-axis multiples by the force.

The angle made with the x-axis is cosine of the angle theta.

Please see picture attached.

5 0

3 years ago

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A ramp that is 8 meters long raises an object 2meters. What is the mechanical advantage

Masteriza [31]

10m long is the right answer or 16

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3 years ago