What causes light to bend when it moves from one transparent medium to another?a change in amplitude

a change in color

a change in frequency

a change in speed

Answers

Answer 1

Answer:

Answer: The correct answer is - change in speed.

When light travels from one transparent medium to another transparent medium, it bends and this phenomenon is known as refraction.

It is caused due to difference in the speed of light in different medium as speed of light is slow in a denser medium (like water) whereas speed is faster in a lighter medium (like air).

Answer 2

Answer: change in speed is the answer

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The atmosphere and oceans are in constant motion. This is because _____.

What is the kinetic energy of a 1.40 kg discus with a speed of 22.5 m/s?

Answers

Kinetic energy = (1/2) (mass) (speed)²

   = (1/2) (1.4 kg) (22.5 m/s)²

   = (0.7 kg) (506.25 m²/s² )

   = 354.375 kg-m²/s² = 354.375 joules .

This is just the kinetic energy associated with a 1.4-kg glob of
mass sailing through space at 22.5 m/s. In the case of a frisbee,
it's also spinning, and there's some additional kinetic energy stored
in the spin.

An apple falls to the ground due to: (A) frictional force. (B) muscular force. (C) gravitational force. (D) electrostatic force.

Answers

The answer is (c) an apple falls to the ground due to gravitational force

Which most likely could cause acceleration? Check all that apply.a flat road
wind
water movement
a hill
a stop light
*can be multiple answers*

Answers

Answer

Wind

Water movement

A hill

Explanation.

The question does not specify it is the acceleration of what is to be accelerated. So my answer will be general. Acceleration is the change of velocity with time.

Wind can cause acceleration of sound. If the sound is travelling in the direction of sound, its speed wound increase. The reverse is also true.

Water movement can also cause acceleration. When a bout is moving in the direction of water movement, then it will be expected that the resultant speed of the bout to be higher. If the bout was moving against the water movement, its speed would be decreased.

A hill would reduce the speed of a moving vehicle. This is also an acceleration that is negative (deceleration).

A stop light and a flat road cannot cause acceleration.

In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 2.20 3 106 m/s. Find (a) the force acting on the electron as it revolves in a circular orbit of radius 0.529 3 10210 m and (b) the centripetal acceleration of the electron

Answers

The force of a particle moving in a circular motion is:
F=ma
where m is the mass and a is the centripetal acceleration, which is expressed as:
a=v²/r

where v is the speed and r the distance between the particles. You use these equations, by substituting the values given in order to solve the problem.

When Anna eats an apple, the sugars in that apple are broken down into the substance called glucose. Glucose is then burned in her body for energy. One of the body parts that needs this energy is the heart, which beats due to electrical impulses. A byproduct of this glucose breakdown is the heat that warms her body and is later released.Which identifies the energy transformations that take place in Anna’s body as this process takes place?

A: Mechanical energy is converted to kinetic energy, which is then converted to potential energy.
B: Chemical energy is converted to thermal energy and electrical energy.
C: Electrical energy is converted to chemical energy and thermal energy.
D: Mechanical energy is converted to potential energy which is then converted to kinetic energy.

Answers

The correct answer is

B: Chemical energy is converted to thermal energy and electrical energy.

In fact:

- initially, the energy is contained in the molecular bonds of the glucose, inside the sugars that Anna is eating, and this energy is in the form of chemical energy

- Part of this energy is converted into the electrical energy that make the heart beating, and this energy is in the form of electrical energy

- The rest of the energy is converted into heat for the body, and this energy is in the form of thermal energy

Answer: B. Chemical energy is converted to thermal energy and electrical energy.

Explanation:

What do ultrasounds use?radio waves
ultraviolet waves
light waves
sound waves

Answers

Ultrasounds are used in the medical profession for the purpose of diagnosis. Ultrasounds uses high frequency sound waves. Thus, the correct option is D.

What are Ultrasounds?

Ultrasound are the sound waves with frequencies which are higher than the upper audible limit of normal human hearing. Ultrasound is not different from normal audible sound frequencies in its physical properties, except that humans cannot hear these sound.

Ultrasound is used in diagnostics where it is also called as sonography or diagnostic medical sonography. It is an imaging method which uses sound waves to produce images of structures within the body of a person. The images produced can provide valuable information for the purpose of diagnosing and directing treatment for a variety of diseases and conditions.

Therefore, the correct option is D.

Learn more about Ultrasound here:

brainly.com/question/14902329

#SPJ2

Answer:

D. sound waves

Explanation:

on edg

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Which example illustrates Newton's second law?A. A wheelbarrow remains stationary when no one pushes on it.B. More mass is added to a wheelbarrow, and a larger force isrequired to move it.C. A person pushes a wheelbarrow, causing it to move forward.D. The force of a wheelbarrow on the ground is equal to the force ofthe ground on the wheelbarrow.