Answer:
The correct option is momentum is conserved
Explanation:
A closed system is a system that is independent/free of external factors/force and does not exchange matter with its surrounding. Since a close system is free of external factors/force; <em>acceleration is constant in it, mass is conserved in it and there will be changes in velocities of objects in the closed system</em>.
This question actually seeks to test our knowledge of the law of momentum. The law of conservation of momentum states that the momentum of a closed system is conserved.
Answer:
a) The speed of the block immediately after the collision is 
.
b) The impulse exerted on the block is 
.
Explanation:
Hi
a) As this is a perfectly elastic collision, we can use the formula 
, due 
, we obtain 
. Then with the data that we know 
and 
, therefore 
or adding uncertainty.
b) Now that we know the speed we can use 
<span>A very rare type of lightning that appears as a reddish-colored sphere is called </span>A + Ball Lightening
Answer:Due to the pressure difference created by rotating fans.
Explanation:
In most of the vacuum cleaners, there is an area which is of disc shape and it is in right next to the motor. There are several fans within the disc that spin at a very high velocity.
The blades will push the air outside of the disk.There is no air in inside of the disc and air pressure creates which pushes air inside the disk to replace the missing air.
So motor is pushing the air outside and to maintain this pressure the air is pushing toward inside with dirt.
A
The delta indicates a difference or change. such as delta y is the change in y position
