The stage where atoms are spread out and bouncy is the gas stage.
Answer:
Explanation:
The forces acting on the crates when the train starts stopping are their weights, the normal force from the train, the static frictional force and the fictional force that is produced by the deceleration of the train. As the gravitational force, this fictional force is equal to the mass of the crates multiplied by the magnitude of the acceleration of the train. So, the equations of motion of the crates will be:
Since the static frictional force is , we get:
So we have a limit to the acceleration of the train. Now, we have to know the distance traveled by the train when it is stopping. Then, we use the kinematic formula:
Now we solve for the acceleration to combine this equation to the inequality we got before:
And solve for x:
Since we are looking for the minimum value for x, we consider the case in which that inequality becomes an equation:
Before we finish, we have to convert the unities of the initial velocity to meters per second:
Finally, we plug in the known values to get :
It means that the train can be stopped at a minimum distance of 36.2m at constant acceleration without causing the crates slide over the floor.
Answer:
30 m/ s it's your answer plz make me brainy least
Answer:
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Explanation:
Copper wire at higher temperature
W = weight of the body in air = 160 N
ρ' = density of body
V = volume of the body
weight of the body in air is given as
W = ρ' V g eq-1
W' = weight of the body in liquid = 120 N
force of buoyancy is given as
F = W - W'
F = 160 - 120
F = 40 N
ρ = density of liquid = ?
force of buoyancy is given as
F = ρ V g eq-2
dividing eq-1 by eq-2
160/40 = ρ' V g /(ρ V g )
4 = ρ' /(0.8 )
ρ' = 3.2
(b)3.2