Answer:8.69 m/s
Explanation:
Given
mass of Empty train
velocity of car
mass of Boulder
Since no External force is acting therefore conserving Momentum
Train and boulder moves with same velocity after collision
because that is the right equation
Calculate them and you will know why the correct answer is D
Any <em>'</em><em>mechanical</em><em>'</em> wave needs a medium in order to travel from one place to another.
Examples of mechanical waves include . . .
-- ocean waves
-- sound waves
-- Slinky waves
-- guitar-string waves
-- hand waves
-- curtain waves
-- ripples on a pond
-- seismic waves (earthquakes)
D) compounds and pure substances
because none of them are elements
Answer:
= = 140 m / s
Explanation:
This is a projectile launch, in this case the components of the initial velocity are seen
Since there is no rice in the X axis, so the velocity is vx, it must be constant, at all times
= = 140 m / s
The vertical component of velocity changes due to having applied the gravity fiate
= - g t