Physics, 28.07.2019 02:30 kkatlynn

As an emergency vehicle approaches bob and moves away from jill, how does the actual frequency of the siren change? a) as an emergency vehicle approaches bob the frequency increases. b) as an emergency vehicle moves away from jill the frequency decreases. c) the actual frequency of the siren does not change despite appearances. d) bob does not notice any change until the vehicle passes him and the siren increases.

Answers: 1

Show answers

Answers

The correct answer is:
C)The actual frequency of the siren does not change despite appearances.

In fact, Bob will observe an increase in the apparent frequency as the emergency vehicle approaches him, while Jill will observe a decrease in the apparent frequency as the emergency vehicle moves away from him, because of the Doppler effect (the relative velocity between the observer and the source of the sound is changing), but this effect involves the apparent frequency, while the real frequency of the siren will remain the same.

Answer from: Quest

quantum mechanics or quantum physics is physics of very small objects (particles) and physical entities.

quantum physics has some parallels to our macro world and some pretty unique ideas which theoretically and mathematically proven to be true even though we will never be able to access them because of our size.

there are many types of particles: subatomic, elementary etc.

subatomic means they are smaller than atom, elementary means they are at the very basis of everything.

subatomic particles are for eg. protons, neutrons but not electrons.

elementary particles are categorised into 3 groups by what they do.

these 3 groups are quarks, leptons and bosons.

light for example is a particle more precisely a photon a part of leptons.

proton (subatomic particle) is made out of 2 up quarks and 1 down quark each of these has a fractional charge like $\frac{1}{3}$ . (i crazy)

most famous scientist who contributed to this physics are:

max planckalbert einsteinerwin schrödingermany

the topic itself us understand a lot and will probably be vastly used in the future (quantum computers, understanding the big bang,

we also must not forget quantum effects like:

superposition (where 1 thing can be this and that at the same time),entanglement (where two particles are seemingly connected by some sort of unknown (or known) force, energy, matter (i know all that can be the same at least it was at the beginning)

and there is more. but probably too much for this answer to be consistent due to my average understanding of this topic.

hope this you understand quantum mechanics a little more. i'm not an expert in the topic (so don't be like wth if you are an expert) but i'm very interested in it.

anyways quantum physics is a very hard topic (harder than physics (perhaps)) therefore searching for every information there is about it and learning it is unfortunately impossible (you can only specialise into 1 - 3 things or more (perhaps

have fun and i wish you luck!

r3t40

Answer from: Quest

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)

An object is located 5.0 cm from a convex lens. the lens focuses light at a distance of 10.0 cm. wha

Another question on Physics

Physics, 22.06.2019 06:40

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?

Answers: 2

Answer

Physics, 22.06.2019 06:40

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

Answers: 1

Answer

Physics, 22.06.2019 11:30

Which accounts for an increase in the temperature of a gas that is kept a constant volume

Answers: 1

Answer

Physics, 22.06.2019 14:00

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.

Answers: 3

Answer

You know the right answer?

As an emergency vehicle approaches bob and moves away from jill, how does the actual frequency of th...

Questions