Answer:
Because the force is inversely proportional to the square of the distance
Explanation:
The magnitude of the electrostatic force between two charged particles is given by

where
k is the Coulomb's constant
q1, q2 are the magnitudes of the two charges
d is the distance between the two charges
We observe that the magnitude of the force is inversely proportional to the square of the distance.
Therefore, when the distance changes to

The force will double:

The spark provides enough energy to break the bonds of reacting molecules and <span>get the reaction started.</span>
Answer:
Any scientific investigation in its simplest form involves collecting information, while a controlled experiment is a tightly controlled investigation that tests a hypothesis.
Explanation:
All the scientific investigations start with a particular question. The question decides what type of investigation should research take. A controlled experiment is an investigation which allows a particular variable to change and all other variable controlled to remain constant to see the effect on dependent variable to test a particular hypothesis while other types of investigations are used to increase the knowledge or information about the particular research subject.
Answer:
Explanation:
Let the height of the tree is y and the distance of tree from point B is x.
According to the diagram

x = 0.55 y ..... (1)

(50 + 0.55y) 1.17 = y ..... from equation (1)
58.5 + 0.644 y = y
0.356 y = 58.5
y = 164.3 ft
Answer:
<u>
</u> is the centripetal acceleration.
Explanation:
As per given values
Radius of earth (r) = 6371000 m
The "international space station" is orbiting with a velocity (v) = 7667 m/s.
"Centripetal acceleration" is the acceleration is equal to "the square of the velocity" divided by "the radius of the circular path".

V = velocity of the orbit
R = radius of the earth + height of the space station
R = 6,371,000 + 408,000
R = 6779000 m
The direction of the centripetal acceleration is always inwards along the radius vector of the circular motion.



