Answer:
Explanation:
The drawing is missing but we can still answer.
In fact, for a stone being whirled on a tabletop, the tension in the cord provides the centripetal force that keeps the stone in circular motion; therefore we can write:
where
T is the tension
m is the mass of the stone
v is the speed
r is the radius of the circle
For the first stone, we have
(1)
While for the second stone,
(2)
since m and v are identical for the two stones. We know that the first cord is longer, such that the radius of the circle in the 1st case is twice that of the second case:
So, substituting into (1),
which means that the tension in the longer cord is half the tension in the shorter cord.
<h3>Answer;</h3>
<em>Energy is transferred.</em>
<h3>Explanation;</h3>
- Work is the force applied over a given distance, in other words work is the product of force and distance. That is; Work = force × distance.
- Work is measured in Joules.
- Energy on the other hand, is the ability to do work.
- According to the principle of work-energy a change in the kinetic energy is equivalent to the net work don e by the object. Therefore, when work is being done energy is being transferred from one point to another.
Answer:
c
Explanation:
protons are the postive charge in your nucleus in the cell
Answer:
b
Explanation:
light does not need a medium
it is refracted
Light is made up of little packets of energy called photons.
electromagnetic waves
Answer:
Explanation:
If you are asking for how much a cubic meter of iron would weight, you need to find its density.
The density of iron taken from the periodic table is , therefore a single cubic meter would weight 7870 kg, which written in scientific notation would be