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SIR K LUVS PHYSICS and Chemistry
Philippines
เข้าร่วมเมื่อ 8 มิ.ย. 2020
IF YOU HAVE DIFFICULTY COMING TO TERMS WITH CERTAIN PHYSICS CONCEPTS AND UNABLE TO APPROPRIATELY APPLY THEM IN SOLVING PHYSICS TEST QUESTIONS, THEN THIS CHANNEL IS FOR YOU. PHYSICS TEST QUESTIONS RANGING ACROSS THE WHOLE HIGH SCHOOL CURRICULUM ARE CAREFULLY SELECTED SO AS TO EMPHASIZE COMMON STUDENTS' MISCONCEPTIONS AND HOW TO CORRECT THEM.
Conservation of Linear Momentum (Solved Problem)
This lesson is an application of both Conservations of Linear Momentum and Mechanical Energy in analyzing two uniform spheres of equal radii and one being twice as massive as the other. The interaction is in deep space where we can assume the system to be isolated. Starting from rest and 40.0 m apart, when released the two spheres accelerate toward each other. When their centers are 20.0 m apart you are required to find their speeds and just before collision you also compute the distance covered by the center of sphere 1 until its surface collides with the surface of sphere 2.
www.youtube.com/@SIRK_ICE
The background music used in this video is courtesy of:
Music track: Heaven by Aylex
www.youtube.com/@SIRK_ICE
The background music used in this video is courtesy of:
Music track: Heaven by Aylex
มุมมอง: 6
วีดีโอ
Double- Slit Light Interference (Solved Problem)
มุมมอง 5612 ชั่วโมงที่ผ่านมา
This is a follow up lesson on Young’s doble-slit experiment on light interference. We put emphasis on computing the wavelength of the monochromatic light used in the experiment as well as the angle formed by a line from the slits to the second order dark fringe on the screen. We use the derived formulas sin theta = m(lambda)/d (for bright fringes) and sin theta = (m ½) lambda / d (for dark frin...
Motional EMF Using Scalar Triple Product (Solved Problem)
มุมมอง 1019 ชั่วโมงที่ผ่านมา
This lesson is a revised excerpt of a past upload on Motional Electromotive Force but this time we focus on the application of vector product (or cross product) of two vector quantities expressed in the unit vectors i, j, and k. Likewise, we apply the unit vector concept called the Scalar Triple Product. www.youtube.com/@SIRK_ICE The background music used in this video is courtesy of: Music tra...
An Enlarged, Erect and Virtual Image (Solved Problem)
มุมมอง 11วันที่ผ่านมา
This lesson is a revisit of the past upload on Image Formation By Lenses. It focuses on describing and quantifying the nature, orientation, and lateral nagnification of the image formed by a converging lens. Using the ray-tracing diagram we also show how the image formed by the lens is determined. www.youtube.com/@SIRK_ICE The background music used in this video is courtesy of: Music track: Hea...
The Contraction of a Spacecraft (Solved Problem)
มุมมอง 1114 วันที่ผ่านมา
This is a revised excerpt of a past upload on Length Contraction-one consequence of the Special Theory of Relativity. In this episode we focus on 1) computing the contracted length given the proper length and the relativistic speed of an object and 2) finding the proper length given the contracted length and the relativistic speed of the object. www.youtube.com/@SIRK_ICE The background music us...
Energy Method Vs. Newton’s 2nd Law (Solved Problem)
มุมมอง 2314 วันที่ผ่านมา
This lesson focuses on analyzing a problem that involves Newton’s three laws of motion as well as the law of conservation of mechanical energy. The concepts of static and kinetic frictions, kinematics equations, static equilibrium and the law of acceleration are prerequisites to understanding the quantitative applications of the energy transformations involved. www.youtube.com/@SIRK_ICE The bac...
A Thermos for Liquid Helium (Solved Problem)
มุมมอง 1721 วันที่ผ่านมา
This is a follow up lesson on a past upload on Thermal Energy Transfer Via Radiation (see end-screen video). It focuses on the radiative thermal energy transfer from the surrounding walls pf a thermos maintained at a temperature 77.3 K of liquid nitrogen to the cylindrical metal can that stores the liquid helium at 4.22 K whose heat of vaporization at that temperature is given. The space betwee...
The Doppler Effect For Sound (Solved Problem)
มุมมอง 1221 วันที่ผ่านมา
This is a follow-up lesson of a past upload on Doppler Effect. It focuses on determining the apparent frequencies heard by a receding listener from a train whistle A which is stationary and from a train whistle B receding from the listener. Both whistles have the same sound frequency. We also find the resultant frequency known as beat frequency of the two observed frequencies from the two sourc...
Resonance of a Standing Wave (Solved Problem)
มุมมอง 1428 วันที่ผ่านมา
This is a follow up lesson of a past upload titled Resonance in Stopped and Closed Pipes (see end-screen video). This time we are focusing on a string instrument called a bass viol with one of its strings vibrating at its fundamental frequency causing the air of a nearby stopped pipe to resonate. Your task is to find the speed of the wave in the string and the length of the air column in the pi...
Speed of Light in a Glass Plate (Solved Problem)
มุมมอง 40หลายเดือนก่อน
This episode is another application of the Law of Refraction of Light or Snells’ Law focusing on determining among others, the speed of light and its wavelength when it passes through a glass plate whose index of refraction is given. The glass plate is located between a point source of light and a screen whose distance of separation is also given. The target variable is the corresponding number...
Storing Energy in a Capacitor (Solved Problem)
มุมมอง 14หลายเดือนก่อน
This episode is a follow up lesson on previous upload titled A Capacitor With A Dielectric (see end-screen video). It focuses on determining the amount of stored electric potential energy in a combination of two unequal capacitors connected in series and in parallel. The first case or case (a) is when the total potential difference is given while in case (b), the total charge is the one given i...
A Capacitor with a Dielectric (Solved Problem)
มุมมอง 14หลายเดือนก่อน
This is a revisit of the lesson on a capacitor that contains a dielectric (pls. see end screen video). A parallel plate capacitor initially has vacuum between the plates. We charge it and acquires a given initial potential difference. We unplug the power supply and insert a dielectric sheet. We are required to find a) the original capacitance, (b) the charge on the capacitor plates, (c) the die...
Adiabatic Heating (Solved Problem)
มุมมอง 27หลายเดือนก่อน
This episode is a revised excerpt of a past upload on adiabatic compression of a gas (see end-screen video). It focuses on adiabatically compressing a quick amount of hydrogen gas which is a diatomic gas given its initial volume, pressure and temperature. The final temperature is also given and we are required to find the value of the ratio of Cp/Cv or gamma, the final volume, pressure and the ...
Speed of Efflux (Solved Problem)
มุมมอง 19หลายเดือนก่อน
This is another example of an application of Bernoulli Equation, the Equation of Continuity and Torecelli’s Law to determine the speed of seawater flowing out of a small hole at the bottom of a sealed tank containing seawater to a height h and air on top that has a certain gauge pressure. Likewise, if the tank is open and the seawater is exposed to the atmosphere, we modify the Bernoulli Equati...
Spring and Friction on An Incline (Solved Problem)
มุมมอง 23หลายเดือนก่อน
This is another problem involving transformation of mechanical energy (gravitational potential to elastic potential and vice versa) of a package released from rest at the top of a rough incline and compresses a spiral spring attached to the bottom of the incline. Because the spring acquires an elastic potential energy when it is compressed by the package, the latter gets propelled up the inclin...
Thermal Conductivity Constant (Solved Problem)
มุมมอง 23หลายเดือนก่อน
Thermal Conductivity Constant (Solved Problem)
Coefficient of Performance of a Freezer (Solved Problem)
มุมมอง 22หลายเดือนก่อน
Coefficient of Performance of a Freezer (Solved Problem)
Rotational Inelastic Collision (Solved Problem)
มุมมอง 17หลายเดือนก่อน
Rotational Inelastic Collision (Solved Problem)
Angular Kinematics Equations (Solved Problem)
มุมมอง 202 หลายเดือนก่อน
Angular Kinematics Equations (Solved Problem)
Sun-Earth-Moon Interaction (Solved Problem)
มุมมอง 362 หลายเดือนก่อน
Sun-Earth-Moon Interaction (Solved Problem)
A System in Dynamic Equilibrium (Solved Problem)
มุมมอง 1662 หลายเดือนก่อน
A System in Dynamic Equilibrium (Solved Problem)
Launching a Test Rocket (Solved Problem)
มุมมอง 172 หลายเดือนก่อน
Launching a Test Rocket (Solved Problem)
Comparison of Energy Released Per Gram of Fuel(Solved Problem)
มุมมอง 202 หลายเดือนก่อน
Comparison of Energy Released Per Gram of Fuel(Solved Problem)
U-235 As a Nuclear Energy Fuel (Solved Problem)
มุมมอง 552 หลายเดือนก่อน
U-235 As a Nuclear Energy Fuel (Solved Problem)
Storing Energy in an Inductor (Solved Problem)
มุมมอง 292 หลายเดือนก่อน
Storing Energy in an Inductor (Solved Problem)
Rounding a Banked Curve (Solved Problem)
มุมมอง 223 หลายเดือนก่อน
Rounding a Banked Curve (Solved Problem)
Two Parallel Superconducting Wires (Solved Problem)
มุมมอง 213 หลายเดือนก่อน
Two Parallel Superconducting Wires (Solved Problem)
An Artificial Eye Lens (Solved Problem)
มุมมอง 203 หลายเดือนก่อน
An Artificial Eye Lens (Solved Problem)
Thank you..pls. share it to other Φ6 enthusiasts.
love it sir!!
The description about the subsequent motion of a positive charge being circular happens only when the charge has emerged away from the parallel plates but the magnetic field outside the plates remains as is.
Only a coherent wave with a wavelength comparable to the size of the aperture demonstrates diffraction patterns. A water wave has relatively long wavelength thus diffraction was not observed.
The single-slit experiment done in a ripple tank with water shows a single wave with no interference whatsoever. Oddly, the same experiment done with light produces a fringe pattern. The idea of light being a wave should've been destroyed right there. Unfortunately, to save the wave dogma, Huygens had to invent his famous Huygens Principle as an ad hoc mathemagical solution, forcing a wave interference where it did not exist.
Glad to have you in my channel. Pls. find electronics-related videos in my Physics playlist. ❤
good day sir kulong, I was your grade 7 student during your last year stay in kisay and the videos you post here are very informative and aligned with what I am currently taking in UP Diliman. hoping for more videos related to electronics and physics and I'm hoping that your channel will grow much further!
Erratum: Towards the end of the video the narrator inadvertently called the mass M as the mass of the planet. He actually meant the mass of the star.
Lapsus lingua: There's a typo error in getting the value for alpha α₂ of rod 2. Instead of writing 0.0650 cm for the ΔL it should have been 0.0350 cm. My apology...
ERRATUM: The formula for the normal force at point B was inadvertently written as m(vₜₐₙ² - g) which should have been m(vₜₐₙ²/r - g). Sorry for this typo error.
Thank you po sir 🫡
Thank you too
ERRATUM: The computed maximum acceleration for Q-3 should be 10. m/s² (NOT 8.5 x 10⁻³). Sorry for this error.
Whether or not the coconut has been picked up by someone is an irrelevant assumption. Logic and correct Φ6 concepts is what matters.
ERRATUM: In explaining the ans. to question (d) I inadvertently typed and mentioned N as the symbol for the final activity when the correct symbol should have been A.
In question 1 the given condition that the linear velocity changes, it assumes only the magnitude of the velocity is changing but NOT the direction of velocity.
Congrats. Very good explanation
Glad you liked it🎉
Lapsus lingua: Sorry for inadvertently saying " the flow speed is inversely proportional to the cross-sectional area of the FLOW SPEED (should have been flow tube).❤😊
But that is assuming that no one picked up the coconut after it has fallen. Haha. For me this problem is just wrong
Thanks for your reaction but can you explain why the problem is wrong? Any suggestion pls.
panoorin niyo po si sir, matagal na po experience sa teaching at magaling po siyang guro.
ang galing niyo pong guro sir!
Thank you!
A more valid reason why letter A. 55 g (in Q-2) is the correct answer following the rule for addition: The given quantity (20. g) has no decimal place while the other given quantity (35.00 g) has 2 decimal places so their sum should be rounded to the nearest whole number (no decimal place). The reason given by the narrator ("since 20. g has 2 sigfig, the sum must also have 2 sigfig") is just a coincidence. If the given quantities were 135.00 g + 20. g then their sum (155.00 g) when rounded to the nearest whole number (without a decimal) would be 155 g and NOT 160 g (2 sigfig).
Lapsus Lingua: While describing the meaning of d₂ in Problem 2, the author inadvertently called 6.96 x 10⁸ m as radius of the earth (he actually meant radius of the sun).
Lapsus lingua: While explaining the right-hand slap rule in Example 3, I inadvertently said that when the velocity vector v⃗ (thumb) doesn't make a 90⁰ angle with the magnetic field vector B⃗ , the component of the magnetic force F⃗ perpendicular to the v⃗ and B⃗ vectors is to be considered. This is incorrect. I should have said the perpendicular component of either v⃗ or B⃗ must be chosen. The B⃗ and v⃗ are NOT necessarily perpendicular to each other. If the angle θ between them is not equal to 90⁰ we still need to find the sin value of θ which results to a force F as implied in the formula; F = B⃗ q x v⃗ sin θ . The resulting force is ALWAYS perpendicular to both B⃗ and v⃗. It is B⃗ or v⃗ that may or may not be perpendicular to each other but the resulting force (provided the angle θ is not 0⁰ or 180⁰) is the one that is always directed perpendicular to the other 2 vectors.
Sorry for inadvertently saying that 1 Bq equals 3.7 x 10⁻¹⁰ Ci. What is right is: 1 Bq equals the reciprocal of 3.7x10¹⁰ Ci or 2.7 x 10⁻¹¹ Ci.
Thanks for the reminder. It is highly appreciated.
Sorry for this error: the vertical displacement equation given in the table should be: Δy = v₀y(t) + 1/2 gt² (NOT Δy=v₀y² +1/2 gt²)
THank you po sirr! Laking tulong po!
Sorry for the typo error in the given: g = -10 m/s²