<span>An object keeps the same amount of kinetic energy unless it speeds up or slows down.
Kinetic energy can be calculated for any moving object as long as the objects' mass and speed are known.
The unit used when measuring kinetic energy is called a joule.
Kinetic energy can occur in any direction whether up and down or left to right.
<span>
When an objects' mass doubles, its kinetic energy also doubles.</span></span>
Answer:
Work function,
Explanation:
Given that,
Frequency of light,
Kinetic energy of the ejected electrons,
We need to find the work function of the gold. Let it is W.
Using Einstein's photoelectric equation as follows :
So, the work function of gold is .
Answer:
- magnitude : 1635.43 m
- Angle: 130°28'20'' north of east
Explanation:
First, we will find the Cartesian Representation of the and vectors. We can do this, using the formula
where its the magnitude of the vector and θ the angle. For we have:
where the unit vector points east, and points north. Now, the will be:
Now, taking the sum:
This is
Now, for the magnitude, we just have to take its length:
For its angle, as the vector lays in the second quadrant, we can use: