Answer:
2.46 W
Explanation:
Thermal conductivity k = 53.4 W/m-K
Radius r = 12 mm = 12x10^-3 m
Lenght = 2.5 m
T1 = 361 °C
T2 = 105 ∘C
Area A = ¶r^2 = 3.142 x (12x10^-3)^2
= 0.00045 m^2
Power P = -AkdT/dx
Where dT = 361 - 105 = 256
dx = lenght of heat travel = 2.5 m
P = -0.00045 X 53.4 X (256/2.5)
= -0.024 X 102.4 = -2.46 W
The negative sign indicates that heat is lost from the metal.
Answer:
= 308.5 N
Explanation:
acceleration of rocket for safe landing
= initial velocity
=final Velocity
m = mass of rocket
-5.625 
Upward force
F - mg = ma
F = ma+ mg
F = m(a+g)
m= mass
a = 5.625
g = 9.8
= 20(5.625 + 9.8)
= 308.5 N
Answer:
there is no diagram, but i can try to help
Explanation:
strong winds bonding together (i.e hot and cold) help form the tornado, depending on the weather depends on how long it can go on, if more hot and cold are feeds into it, it will get faster and last longer. it is just like dust devils, it is wind and dirt mixing to make a tornado, the more wind and dirt the worst it will be
Power rating = volts x amps
Power rating = 7.5 x 120 = 900 watts
Answer: 900 watts
-- There are 80 protons in the nucleus of every atom of Mercury,
but only 8 of them in the nucleus of an atom of Oxygen.
-- Mercury must be warmer than 357°C in order to boil, but Oxygen
must only be warmer than -183°C.
-- Mercury must be colder than -39°C in order to freeze, but Oxygen
must be colder than -219°C.
-- Oxygen is required for human life. Mercury is a deadly poison.
