A: geologist
b: physical science
c: space science
d: ecologist
If two positive charges are near each other they will repel each other.
Answer:

Explanation:
Intensity is given by the expresion:

where:
Io = inicial intensity
r1= initial distance
r= final distance


The collision of car 2 is more violent (because more impulse is exerted)
Explanation:
The collision which is more violent is the one in which more impulse is exchanged.
The impulse exerted by each car on the wall is equal to the change in momentum of the car:

where
m is the mass of the car
is the change in velocity
For the car 1,
m = 1000 kg
(the sign is negative because the velocity of the car has changed from 100 km/h to 0 km/h)
So the magnitude of the impulse of car 1 is

For the car 2,
m = 1200 kg

So the magnitude of the impulse of car 2 is

So, car 2 exerts a larger impulse, therefore its impact is more violent.
Learn more about impulse and change in momentum:
brainly.com/question/9484203
#LearnwithBrainly
Answer:
Newton's first law
Explanation:
it says that an object will continue to be at rest or keep moving till any external for is applied to it to make it move or stop respectively.