Physics, 01.09.2019 09:10 vegeta8375

What is the approximate weight of a 20-kg cannonball on earth?
a. 2 n
b. 20 n
c. 200 n
d. 2000 n?

Answers: 1

Show answers

Answers

   Weight = (mass) x (acceleration of local gravity)

   = (20 kg) x (9.81 m/s²)

   =    196.2 Newtons

   (about 44.09 pounds)

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

f=ma a/f/m a= 480/60 a = 8m/s/s that is quick wow

Other questions on the subject: Physics

Physics, 22.06.2019 07:10, ddswaggsoflyy3176

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

Answers: 2

continue

Physics, 22.06.2019 09:00, pancho99

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack

Answers: 2

continue

Physics, 22.06.2019 09:10, melody32

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Answers: 2

continue

Physics, 22.06.2019 11:00, jackiemiranda2010

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

Answers: 2

continue

You know the right answer?

What is the approximate weight of a 20-kg cannonball on earth?
a. 2 n
b. 20 n
...