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3 years ago

Light question

2 answers:

7 0

They're similar in the sence that they involve the perception of light, they're different because they're different perceptions of light.

Hope this helped!

julia-pushkina [17]3 years ago

4 0

Answer:

reflection bounces the light back and refraction does not. the both change the direction of the light.

Explanation:

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Solve the problem. Unless stated otherwise, assume that the projectile flight is ideal, that the launch angle is measured from t

kirill115 [55]

Answer:

d = 185.26 meters

Explanation:

It is given that,

Launching angle of the projectile, $\theta=26^{\circ}$

Initial speed of the projectile, u = 48 m/s

Let at distance d the projectile hits the ground from the launch point. It is equal to range of the projectile. Its formula is given by :

$d=\dfrac{u^2\ sin2\theta}{g}$

Substituting all the values in above formula. So, we get :

$d=\dfrac{(48)^2\ sin2(26)}{9.8}$

d = 185.26 meters

So, the distance between the launch point and the point where it hits is 185.26 meters. Hence, this is the required solution.

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3 years ago

Which of the following changes will increase the frequency of an oscillating pendulum?

svlad2 [7]

Answer:

c. an increase in the length of the rope.

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3 years ago

A screwdriver is used to pry the lid off a paint can. The resistance arm is 0.5 cm long and the effort arm is 20 cm long. What i

Lunna [17]

Answer:

Explanation:

Mechanical advantage = effort arm / load arm

MA = 20 cm / 0.5 cm

MA = 40

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3 years ago

Jane and John Doppler effect

UkoKoshka [18]

Answer:

To summarize, Jane's star has a red light and is traveling towards the Earth while John's star has a blue light and is traveling away from the Earth. This is a prime example of the Doppler Effect in motion. The stars look different because they are traveling in different directions.

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3 years ago

A sound wave is often called a pressure wave because there are regions of high and low pressure established in them medium throu

Bingel [31]

Explanation:

A sound wave is often called a pressure wave because there are regions of high and low pressure established in them medium through which the sound wave travels. The regions of high pressure are known as Compressions and the regions of low pressure are known as Rarefactions . Sound waves are composed of compressions and rarefactions. Compressions are the parts where the molecules are congusted and pressed together. However in the rarefactions molecules are relax and have enough space for expansion. Sound waves are the logitudnal waves and always been defined as the motion of the medium particles parallel to the wave motion.

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3 years ago