Question

6 multiple choice 1 point coulombs law describes the force between charged particles. if the distance between two charges is cut in half, what happens to the force between them? it doubles it quadruples it decreases to 1/2 it decreases to 1/4 7 multiple choice 1 point a lightning bolt releases ~5 billion joules of energy in less than a second. which energy transformation best describes what happens during the strike? gravitational → nuclear → kinetic electrical → light + thermal + sound nuclear → chemical → thermal thermal → chemical → mechanical 8 multiple choice 1 point which of the following explains why standing under a tree during a thunderstorm is dangerous? trees act as insulators that block current from reaching the ground. trees attract lightning because of their chlorophyll trees generate negative charges that repel lightning. trees are the tallest objects, providing a shorter path for charges to travel.

Explanation:

6.

Step1: Recall Coulomb's Law

The force $F$ between two charges is given by $F = k\frac{q_1q_2}{r^{2}}$, where $k$ is a constant, $q_1$ and $q_2$ are the charges, and $r$ is the distance between them.

Step2: Analyze change in distance

If the new distance $r'=\frac{r}{2}$, then the new force $F'=k\frac{q_1q_2}{(r')^{2}}=k\frac{q_1q_2}{(\frac{r}{2})^{2}} = 4k\frac{q_1q_2}{r^{2}} = 4F$. So the force quadruples.

A lightning - bolt is an electrical discharge. When it occurs, electrical energy is transformed into light (we see the flash), thermal energy (it heats up the air), and sound energy (we hear the thunder).

Trees are often the tallest objects in an area. During a thunderstorm, charges in the atmosphere are looking for the shortest path to the ground. Since trees are tall, they provide a shorter path for the charges (lightning) to travel, making it dangerous to stand under them.

Answer:

It quadruples

7.