Answer:
see explanation below
Explanation:
Given that,
500°C
= 25°C
d = 0.2m
L = 10mm = 0.01m
U₀ = 2m/s
Calculate average temperature
262.5 + 273
= 535.5K
From properties of air table A-4 corresponding to = 535.5K
k = 43.9 × 10⁻³W/m.k
v = 47.57 × 10⁻⁶ m²/s
A)
Number for the first strips is equal to
Calculating heat transfer coefficient from the first strip
The rate of convection heat transfer from the first strip is
The rate of convection heat transfer from the fifth trip is equal to
Calculating
The rate of convection heat transfer from the tenth strip is
Calculating
Calculating the rate of convection heat transfer from the tenth strip
The rate of convection heat transfer from 25th strip is equal to
Calculating
Calculating
Calculating the rate of convection heat transfer from the tenth strip
When you know both the speed and direction of an object’s motion, you know the velocity of an object. speed in a given direction is called velocity
hope this helps :)
The answer should reflect the number in the problem With the decimal
A carpenter hammering a nail
Explanation:
This is the only choice that gives you an object exerting a force ( the carpenter/hammer ) and one that has a force exerted on it ( the bail )
All of the rest would be related to acceleration and speed
Answer:
When two balls are raised from one end and released, they strike the row and two balls pop out from the other end. If instead, one ball popped out with twice the speed of the two, this would violate <u>law of conservation of energy</u>.
Explanation:
"According to law of conservation of energy, energy can neither be created nor destroyed it only changes it's states."
we can prove it as
the initial momentum = 2mv
if one ball popped out with 2v then the momentum would be conserved.
But the initial kinetic energy of these two balls are given as
but if the speed of one ball is twice then that of other one then the kinetic energy won't remain conserved.
thus it violates the law of conservation of energy.