What is the apparent change in frequency of waves due to the motion of a source? Photoelectric effect Prismatic change Doppler effect Wavelength variability

Answers

Answer 1

Answer:

Answer: Doppler effect

Explanation:

The Doppler effect refers to the change in a wave perceived frequency when the emitter of the waves, and the receiver (or observer in the case of light) move relative to each other.

In other words, it is the variation of the frequency of a wave due to the relative movement of the source of the wave with respect to its receiver.

Another important aspect is that the effect occurs in all waves (including light and sound). However, it is more noticeable to humans with sound waves.

Answer 2

Answer:

The Doppler effect is the apparent change in frequency of waves due to the motion of a source.

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If an atom is neutral, then the number of electrons is equal to the number of

Answers

Answer:

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

hope it helps:)

Answer:

Then number of electrons is equal to number of protons

Explanation:

Since protons are positive and electrons are negitive, they cancel each other.

HENCE THEY ARE NEUTRL

Hope it helps u...

Whats the answer to this question

Answers

It is the first option because Rutherford had put forward the first option and Neils Bohr changed the model of an atom

A student notices that an inflated balloon gets larger when it is warmed by a lamp. Which best describes the mass of the balloon as a result of this change?A. The mass of the balloon increases because the size of the balloon has increased.

B. The mass of the balloon increases because the temperature of the balloon has increased.

C. The mass of the balloon stays the same because the gas inside the balloon still has same mass after it warms up.

D. The mass of the balloon stays the same because warming decreases the mass enough to cancel out the effect of increasing the size.


  Please explain why you chose your answer

Answers

A). No. Mass doesn't just appear out of thin air. The total amount of mass never changes, no matter what you do to it.

B). No. Same reason as (A).

C). Yes. The total amount of mass never changes, no matter what you do to it.

D). No. The amount of mass never changes, no matter what you do to it.

C is the correct answer

Why is an objects density expressed as a combination of two units

Answers

Except for mass, length, time, and electric charge, EVERY quantity is
a combination of units ... of THOSE units in fact. Hadn't you noticed ?

An objects density is expressed as a combination of two units because the equation for density is Mass/Volume=Density. Therefore, both the mass and the volume retain a unit measure and when they are put together they create an expression that is a combination of two units such as kg/m^3 or g/cm^3.

contrast the force of gravity between these pairs of objects: 1-kg mass and a 2-kg mass that are 1 m apart; a 1-kg mass and a 2-kg mass that are 2 m apart; and two 2=kg masses that are 1 m apart. helpppppp i dont understand.

Answers

force of gravitation between two different masses is given by

$F = (Gm_1m_2)/(r^2)$

here in first case we will have

$F_1 = (G(1kg)(2kg))/((1m)^2)$

$F_1 = 2G$ Newton

another case we have

$F_2 = (G(1kg)(2kg))/((2m)^2)$

$F_2 = (G)/(2)$ Newton

another case we have

$F_3 =(G(2kg)(2kg))/((1m)^2)$

$F_3 = 4G$ Newton

so the force will be maximum in last case when two 2 kg mass is placed at 1 m distance and minimum force is in second case when 1kg and 2kg mass is placed at 2 m distance

Describe the Earth's rotation around the Sun

Answers

The Earth's orbit is the path through which the Earth travels around the sun. A complete orbit occurs every 365.256 days, where the Earth is traveling at 940 million km during a single orbit.

Other Questions

Can someone help me with number 3?

Click to select the correct answers. Click again to unselect answers. Leave the incorrect answers unselected.What do you know about the law of conservation of energy? Check all the statements that are true according to this law.The total amount of mass in a system remains constant regardless of the changes that take place in that system.Energy is neither created or destroyed; it only changes form.Half-way down the ramp, PE = 50J and KE = 50J.In this energy pyramid, all the energy from level is transferred to the next level.In a closed system, i.e., a system that isolated from its surroundings, the total energy of the system is conserved.

All of the following are benefits to getting involved with activities outside of school except

The park has added two more cars to the already existing roller coaster. If the park wants to maintain the speed of the roller coaster with the addition of the cars, what must it do? A) Increase the height a point A. B) Increase the heights at point A and B. C) Reduce the number of hills and dips in the course. D) Increase the friction between the wheels and the track.