Answer:
The time period of the solar system's orbit is 
Explanation:
Given that,
Distance = 25000 light year
Speed of light 
Speed of astronomers = 230 m/s
Suppose the orbit is circular, we need to find the time period of the solar system's orbit.
We need to calculate the time period
Using formula of time period


r = distance
t = time
v = speed
Put the value into the formula


Time in years


Hence, The time period of the solar system's orbit is 
Answer:
The charge is 0.056 nC.
Explanation:
Given that,
Electric field = 2000 N/C
Distance = 5.0 cm
We need to calculate the charge density
Using formula of charge density


Put the value into the formula


We need to calculate the charge in 1.0 cm
Using formula of charge




Hence, The charge is 0.056 nC.
Using the Universal Gratitation Law, we have:
Again applying the formula in the new situation, comes:
Number 4If you notice any mistake in my english, please let me know, because i am not native.
The displacement of the object that moved 4 meters north, then 3 meters east is 5 meters.
<h3>
What is displacement?</h3>
Displacement is change in the position of an object. It can be described as the shortest distance between the initial and final position of an object.
The displacement of the object is calculated as follows;
d² = 4² + 3²
d² = 25
d = 5 m
Thus, the displacement of the object that moved 4 meters north, then 3 meters east is 5 meters.
Learn more about displacement here: brainly.com/question/2109763
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B-friction acts in direction opposite to objects motion