Answer:
4v/3
Explanation:
Assume elastic collision by the law of momentum conservation:
where v is the original speed of car 1, v1 is the final speed of car 1 and v2 is final speed of car 2. m1 and m2 are masses of car 1 and car 2, respectively
Substitute 
Divide both side by 
, then multiply by 6 we have
So the final speed of the second car is 4/3 of the first car original speed
Electric field lines are a pictorial way to represent the electric field of a charge which basically indicates the field's strength.
The electric field is strong when the lines are close together and weak when they are far away from each other.
The greater the strength of the charge, the greater will be the number of field lines.
Hence, electric field lines provide a picture of an electric field indicating a field’s strength.
The correct option is Electric field lines
Answer:
Interstellar Dust
Explanation:
In the solar system Interstellar dust is a type of cosmic dust and unlike Interstellar gas they have large dust particles enabling them to block visible light. Unlike smoke and fog, they contain large number of closely packed clumps of atoms and molecules
Answer:
1.152 miles
Explanation:
Given: central angle = 1 minute = 
radius of the earth = 3960 miles
The length of an arc = 
2
r
where: 
is the central angle, and r is the radius.
Thus,
Distance along the arc = 2r
Distance along the arc = 
x 2 x 
x 3960
= x 24891.4286
= 1.1524
The required distance along an arc is 1.152 miles.
Answer: 2m/s
Explanation:
V avg = Displacement / time
Displacement is 8
Time is 4
V avg = 2
