a central concept in quantum mechanics is that both matter and are alternate forms of the same entity and therefore both exhibit
2 answers:
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Answer:
a) The final speed of the 0.400-kg puck after the collision is 2.254 meters per second, b) The negative sign of the solution found in part a) indicates that 0.400-kg puck is moving westwards, c) The speed of the 0.900-kg puck after the collision is 3.606 meters per second eastwards.
Explanation:
a) Since collision is perfectly elastic and there are no external forces exerted on pucks system, the phenomenon must be modelled after the Principles of Momentum and Energy Conservation. Changes in gravitational potential energy can be neglected. That is:
Momentum
Energy
Where:
,
- Masses of the 0.400-kg and 0.900-kg pucks, measured in kilograms.
,
- Initial speeds of the 0.400-kg and 0.900-kg pucks, measured in meters per second.
,
- Final speeds of the 0.400-kg and 0.900-kg pucks, measured in meters per second.
If ,
,
,
, the system of equation is simplified as follows:
Let is clear in first equation:
Now, the same variable is substituted in second equation and resulting expression is simplified and solved afterwards:
There are two solutions:
or
The first root coincides with the conditions before collision and the second one represents a physically reasonable solution.
Now, the final speed of the 0.400-kg puck is: ()
The final speed of the 0.400-kg puck after the collision is 2.254 meters per second.
b) The negative sign of the solution found in part a) indicates that 0.400-kg puck is moving westwards.
c) The speed of the 0.900-kg puck after the collision is 3.606 meters per second eastwards.
Answer:
Explanation:
Deflection in the drop is due to electric field force
so we will have
acceleration of the drop is given as
now we know that time to cross the plates is given as
now the deflection is given as
Answer:
Explanation:
The Coulomb's law states that the magnitude of the electrostatic force between two charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them:
In this case, we have :