By using the coefficient of linear expansion, the increase in the length of the metal plate is by 0.015m and in the area is by 0.3074.
The rate of change in length of a metal per degree change in temperature is known as the coefficient of linear expansion.
Given:
Coefficient of linear expansion, α = 29 x /k
Length, L1 = 10m
T1 = 25℃
T2 = 78℃
ΔT = 78 – 25 = 53℃
To find:
Change in length (ΔL) and area (ΔA) of metal plate = ?
Formula:
ΔL = α L1 ΔT
ΔA = A1 2 α ΔT
Calculations:
ΔL = 29 x x 10 x 53
ΔL = 0.01537m
ΔA = 100 x 2 x 29 x x 53
ΔA = 0.3074
A2 = 100.3074
Result:
The increase in the length and area is by 0.015m and 0.3074 respectively.
Learn more about Coefficient of linear expansion of metals here:
brainly.com/question/14780533
#SPJ9
Answer:
The value speed is
Explanation:
From the question we are told that
The mass of the ping pong ball is
The radius is
The depth of the ping pong inside the water is
Gnerally the force with which the ball will emerge will from the water is mathematically represented as
Here B is the Buoyant force on the ball which is mathematically represented as
Here is the volume of the ball which is mathematically represented as
=>
=>
is the density of water with value
So
=>
So
=>
=>
Generally force is mathematically represented as
So
=>
Generally from kinematic equation
Here u is the velocity of the ping pong at depth of 0.3 m and the value is zero given that at that point there was no motion
So
=>
I halved the speed of light in vacuum to get the speed of light in the material, since the speed of light in vacuum is twice the speed of light in material.
The index of refraction is essentially the speed of light through a vacuum divided by the speed of light through given medium.
I attached some notes on refraction too, hopefully this helps :D