A stationary source emits a sound wave of frequency f, = 1.5kHz, intensity 7, = 0.5 and amplitude of relative pressure 4, = 12 Pa in a medium with modulus of elasticity B, = 250 x 10 ', but of impedance m acoustics Z, unknown. When the emitted wave enters an immobile substance of density p, = 8.1 and impedance Z,> Z, the wave transmitted in the substance has a sound intensity level I1, = 116.478 dB. a) Determine the values of Z, .Z, A and B ,? b) Determine the relative pressure wave function Ap, (x,) of the reflected wave if ø, = 0. c) What are the sound intensity levels of the incident wave and the reflected wave? d) If the source moves away from the substance and then perceives a beat frequency of 50.96 Hz, determine how fast the source is moving away from the substance. A layer of ice with refractive index n, = 1.31 and thickness e = 20cm has formed above of a body of water with index n = 1.33. A light source is located at a depth h = 3m below the ice cream. We want to determine the radius L of the circular region where the light passes through the interface. ice-water and the R-ray where it successfully crosses the ice-air interface. a) Calculate the radius L where the light passes at the water-ice interface. b) Determine the value of radius R. ) Is it possible that rays are trapped in the ice by multiple reflections between the 2 interfaces? air (n, -1) ice cream (n-1.31) water (n, = 1.33) water A thin biconcave lens, located in the air, of focal length | f | = 10 cm is located at Scm of a glass lens (n = 1.5) of thickness a = 10 cm of type concave-convex with the same radius of curvature R R RI = 10cm, the convex surface of which is covered with . mirror layer. If you place a real object 10 cm away left of the thin lens, determine the position and Mirror characteristics (type and magnification) of the image Dioptre ave final compared to the initial object. O-

specific latent heat of fusion, lf, of a substance is defined as the amount of heat required to change a unit mass of the substance from solid to liquid state, without any change in the temperature.

explanation:

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

are there options? cause you ain’t. real specific