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lenpollock

@ lenpollock

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๐Ÿ“… joined in may 2021
  • barclays premier league
  • manchester united football club

when manchester united was founded ?

as manchester united it was founded on the 24 april 1902.

however, as newton heath lyr f c it goes back to 1878. debts forced the newton heath club to refinance and re-structure in 1902 , and in this process it became manchester united f.c.

  • science

is heat a material ?

no!!!

heat is not a material.

heat is radiation.

in the electro-magnetic waveband, electro-magnetic (e/m) radiation is in the long wave (microwave region). the e/m wave 'hit' the material object and make the molecules in the object vibrate more violently, this increase in vibration is felt as heat.

also in the e/m wavebands is the region of 'white' light, that which we see. the wavelength is shorter. the e/m waves strike the back of the eye (retina) making the molecules in the retina vibrate faster, and stimulate the optic nerve to respond to the brain . this is the light that we see.

other forms of e/m radiation from shortest to longest wave length are :-

cosmic, x-ray, uv rays, white light, infra-red, microwaves, radiowaves.

  • math and arithmetic

on the outbound leg of a 450 mile trip, the plane flew at a slow speed. on the trip back (also 450 miles), the pilot tripled the speed of the plane. how fast did the plane travel on the trip back if the total traveling time was 8 hours ?

speed = distance / time

out bound

s = 450 / t

in bounds

3s = 450 / t

algebraically rearranging

t = 450 /s

t = 450 /3s

adding

2t = 8hrs = 450/s + 450/3s

2t = (3s(450) + 450s) / 3s^2

2t = (1350s + 450s) 3s^2

2t(3s^2) = 1800s

but 2t = 8

hence

24s^2 = 1800s

cancel down by '24'

=>

s^2 = 75s cancel down by 's'

s = 75

so 3s = 3(75) = 225 mph is the speed on the in bound (return journey).

  • science

how does deforestation affect the atmosphere ?

carbon dioxide from the atmosphere is not absorbed, and oxygen produced, and the carbon (of co2) cannot form biomass), because there are no trees.

photosynthesis is the process in green plant material (leaf , grass etc.,) where carbon dioxide is absorbed, and oxygen produced into the atmosphere. 'u.v' light(sunlight) is also needed; the process does not proceed at night. the carbon of co2 forms part of the plant's biomass. trees are particularly efficient at this process, but all green plant material (grass , leaves, etc.,) undergoes the process. carbon dioxide (co2) is a heavy gas, and will fall to the ground, hence it will react with plant material, and not move into the upper atmosphere.

  • math and arithmetic
  • geometry
  • fractals

what are some real life things that are fractal like ?

the inside of a shell of a nautilus (sea snail)

th branches on a plant/tree divide out at each node using the golden number 1 : 1.615...