Definitions by bored hong kong student
P=ρgh
It is the fluid pressure equation. P stands for the pressure, ρ stands for the density of the fluid medium, g is the acceleration due to gravity (9.81ms^-2 on Earth) and h is the height of the measured pressure's distance from the surface of the fluid itself.
HKCEE physics paper: Peter filled a tube measuring 3m tall with water to the brim. Find the pressure at the middle of the water tube. (Density of water at r.t.p= 997kgm^-3)
By P=ρgh
P=(997)(9.81)(1.5)
P=14700 Pa (3 sig fig)
By P=ρgh
P=(997)(9.81)(1.5)
P=14700 Pa (3 sig fig)
P=ρgh by bored hong kong student July 4, 2022
F=mrω²
It's the centripetal force equation. F represents the centripetal force exerted on an object in a circular motion. r represents the radius of the circular motion. ω represents the angular velocity which is 2π/period.
HKCEE A level paper: An object is in circular motion. It's period is 6.28s. The radius of the turn is 10m. The mass of the object is 1kg. Find the centripetal force exerted on the object.
By ω=2π/T
ω=1 rads^-1
By F=mrω²
F=(1)(10)(1)²
F=10N
By ω=2π/T
ω=1 rads^-1
By F=mrω²
F=(1)(10)(1)²
F=10N
F=mrω² by bored hong kong student July 4, 2022
F4 Phantom
F4 Phantom is a cold war era fighter bomber jet. During the vietnam war, F4s are used extensively in Vietnam. Its main enemy is the MiG-21. The jet, with afterburner on, can exceed mach 2 and it can carry 4 AIM-7 Sparrow air to air missile or the more advanced AIM-9 sidewinders, more than 8000kg of bombs, external fuel tanks, guided bombs and air to ground missiles for ground attack missions. The earlier models didn't include any cannon, just air to air missiles, however the later models did include a 20mm M61 Vulcan rotary cannon. There are 2 crews consisting of the pilor and a weapon system officer. The jet, with its heavy airframe, can reach mach 2.2 with its afterburning General Electric J79 engine. The Phantoms have a advanced radar system which can alert the crews of incoming threats even beyond visual range. The Phantoms also have a monitor for the pilot to see the radar pings, which was a very advanced technology back in the 60s. Around 5200 of these fighter jets were produced in the span of over 20 years.
F4 Phantom by bored hong kong student March 31, 2022
Water
The element that we all need to survive. It is one of the most important substance known to mankind which can sustain lives. Freezes at 0 degree celsius and boils at 100 degree celsius. It is used for drinking, showering, farming, transport etc. Also tastes the best when drank at 3am.
Water by bored hong kong student August 15, 2021
DSE
DSE by bored hong kong student April 14, 2021
RAM
RAM by bored hong kong student November 14, 2020
Secondary school
Hell. Absolute hell. In Hong Kong we have at least 5 homework per day. Bunch of retarded form 1 and form 2 students thinking they are grown ups and running up and down the corridor like driving a racing car. In form 3 there are so many depressed and frazzled. Form 4 students always beat up one another, form 5 students stressed out af to prepare to face the crappy DSE and form 6 students that does not come to school. If you think that the educational system in Europe and America is bad enough, then you should come to Hong Kong, the most intelligent and depressed place in the world.
Secondary school by bored hong kong student November 13, 2020