After an explosion far away, a person working on a farm first senses vibrations in the ground, then hears the explosion. what accounts for the time between the vibrations and the noise? a) wind slows down the noise in the air. b) the landscape affects the way sound travels through the air. c) sound travels faster through the ground than through the air. d) the speed of sound is faster through the air than in the ground.

Letter C because the farmer had felt the ground shake first than him listening to the sound

C)Sound travels faster through the ground than through the air cuz' sound can travel thro' ground n air. person felt vibration which is sound thro solid before hearing it (sound thro air). so sound must travel faster thro gnd.

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 . (i crazy)

most famous scientist who contributed to this physics are:

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:

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; equivalent to a one(1) horsepower motor;