According to the law of gravitational force:
the force between any two objects is directly proportional to the masses of the objects and inversely proportional to the square of the distance between these two objects.
Based on this:
if a 9 c charge is replaced with a 4 c charge while the distance between the charges is kept constant:
18/9 = F/4
2 = F/4
F = 2 x 4 = 8
Rocks is work well. It worked because it worked
Answer:
Distance in mm will be 0.3718 mm
Explanation:
We have given charge surface charge density 
We know that electric field due to surface charge density is given by
We have given potential difference V = 105 volt
We know that potential difference is given by 
So 
Answer:
false
Explanation:
Linear momentum is the product of an objects mass and velocity
p=m×v
Answer:
Option A
Measures light from distant objects
Explanation:
A spectroscope is used to measure the use of light from a distant object to work out the object is made of.
It could be the single-most powerful tool astronomers use.
Professor Fred Watson from the Australian Astronomical Observatory says that "It lets you see the chemicals being absorbed or emitted by the light source"
