Answer:
Unbalanced
Explanation:
There is an acceleration. Look at the direction of the arrows.
Answer:
y₀ = 10.625 m
Explanation:
For this exercise we will use the kinematic relations, where the upward direction is positive.
y = y₀ + v₀ t - ½ g t²
in the exercise they indicate the initial velocity v₀ = 8 m / s.
when the rock reaches the ground its height is zero
0 = y₀ + v₀ t - ½ g t²
y₀i = -v₀ t + ½ g t²
let's calculate
y₀ = - 8 2.5 + ½ 9.8 2.5²
y₀ = 10.625 m
Answer:
The lowest mass that an object can have to be considered a star is 0.08 solar masses.
Explanation:
A star is get when it reaches the necessary temperature in its core to nuclear reaction began.
A Nuclear reaction is the fusion of lighter elements into heavier elements.
In stars there is an equilibrium between two forces, the force of gravity in the inward direction due to its own mass and the radiation pressure in the upward direction as a consequence of the nuclear reaction in its core, which is known as hydrostatic equilibrium.
Therefore, the mass of the star must be enough to the force of gravity act in the inward direction, which leads to the increase in pressure, density and of course temperature in the core, allowing the nuclear reaction to begin.
Hence, the lowest mass that an object can have to be consider a star is 0.08 solar masses.
Answer:
Explanation:
Given
n=5
0.3 fraction recrystallize after 100 min
According to Avrami equation
where y=fraction Transformed
k=constant
t=time
Taking log both sides
At this Point we want to compute 
taking log both sides
Rate of Re crystallization at this temperature
Given Information:
Radius = r₁ = 150 m
Radius = r₂ = 73 m
Maximum speed = v₁ = 28.0 m/s
Required Information:
Maximum speed = v₂ = ?
Answer:
Maximum speed v₂ = 19.53 m/s
Explanation:
The maximum acceleration of the truck is
a = v²₁/r₁
a = 28²/150
a = 5.226 m/s²
Now if we change the radius to r₂ = 73 m
Then the maximum speed of the truck is
v₂ = √a*r₂
v₂ = √5.226*73
v₂ = 19.53 m/s
So the speed of the truck is decreased when the radius of curve is decreased.
