Briefly explain the concepts of frequency reuse in the cellular system [4 marks] (a) (ii having a radius of 0.64km and a co-channel reuse factor of 12 determine the distance for the nearest co-channel cell1 for a cell that [hint: frequency reuse ratio, q r [6 marks] (b) the first generation cellular advanced mobile phone service (amps) system is allocated 25mhz band with 21 control channels for one direction communication at 800mhz range. the total bandwidth required for communication is 50mhz. the frequency separation between the uplink and downlink is 45mhz. the guard band is 40khz and each simplex channel is 30khz determine the total numbers of channels within the system [5 marks] determine whether the amps system is simplex, half-duplex or duplex [5 marks] 11 (iii) 352 at 880.560mhz find the transmission frequency of a mobile subscriber unit transmitting on channel 352 consider the base station transmits control information on channel

hotter stars = bluer stars

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

terd muffin is the correct answer

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.