The three things to remember about gravitational forces in space are:
(1) The gravitational forces are inversely proportional to the square of the distance between the objects. More is the distance between the objects , less will be the gravitational force between them.
(2) The gravitational forces are the weakest of all the four fundamental forces (Nuclear forces, weak forces, electromagnetic forces, gravitational forces) in nature.
(3)Gravitational forces are always attractive . They are also conservative in nature. work done by these forces or against these forces doesn't depend on the path followed.
It depends on what it is closest to but I would say for instance black is 5 points and red is 6 if u land on the line 5.5
Explanation :
It is given that an oscillator makes 360 oscillations in 3 minutes.
(a) Using unitary method :
No. of vibrations in one minute is, 
So, no of vibrations in one minute is 120.
(b) Similarly,
3 minutes = 180 seconds
No of vibrations in one second is 
So, the no of vibrations in one second is 2.
(c) Time period of the wave is given by :


The time period of the wave is 0.5 s
(d) The no of vibation per second is called as its frequency.


Hence, this is the required solution.
Answer:
The intensity of light be maximum is for angles 23.3° and 52.3°.
Explanation:
Given that,
Wave length = 632.8 nm
Distance = 1.60 μm
We need to calculate the intensity of light be maximum
Using Bragg's law


We need to calculate the angle for different value of n
Using Bragg's law

For n₁,
Put the value into the formula


For n₂,


Hence, The intensity of light be maximum is for angles 23.3° and 52.3°.