Explanation:
Below is an attachment containing the solution.
<h2>
Speed with which it return to its initial level is 100 m/s</h2>
Explanation:
We have equation of motion v² = u² + 2as
Initial velocity, u = 100 m/s
Acceleration, a = -9.81 m/s²
Final velocity, v = ?
Displacement, s = 0 m
Substituting
v² = u² + 2as
v² = 100² + 2 x -9.81 x 0
v² = 100²
v = ±100 m/s
+100 m/s is initial velocity and -100 m/s is final velocity.
Speed with which it return to its initial level is 100 m/s
Stars form inside relatively dense concenstrations of interstellar gas and dust known as molecular clouds.
hope it helps
That will be A melting a substance that's because the rest are examples of chemical changes and also its the same thing but in a different form.
Explanation:
Given:
t = 20 seconds
x = 3000 m
y = 450 m
a) To find the vertical component of the initial velocity , we can use the equation
Solving for ,
b) We can solve for the horizontal component of the velocity as
or