Answer:
Magnitude of y-component=7 units
Direction= angle of vector A with x-axis= 
Explanation:
Explained solution is in the picture attached
 
        
             
        
        
        
The charge present determines a force to be attractive or repulsive.
The charges acquired by two bodies determines the Force as Attractive Or Repulsive.
Electric Force applied due to Electrical charges is same in magnitude but opposite in direction. This corresponds this phenomenon equivalent to the Newton's Third Law.
Examples of the experiments and observations:
- On combing hair through a comb and then keeping it close to small pieces of paper shows attraction of paper pieces towards the comb.
This occurs due to the Electric charges present in the comb that induces charge in paper pieces leading to their attraction.
- In both Gravitational Force and Coulomb force, the force remains inversely proportional to the square of the distance following the Inverse Square Law being the Central Force system. This only differs by the fact that in Gravitational Force, masses are used and in Coulomb force, charges are used.
The more the distance between the charges, the less is the Electric Force.
The lesser the distance between the charges, the more is the Electric Force.
If both the objects are charged the same i.e. either positive or negative then the Force is Repulsive and if the charges are Oppositely charged then the force is attractive.
Hence, the charge present determines a force to be attractive or repulsive.
Learn more about Coulomb Force here, brainly.com/question/15451944
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Which best describes the transition from gas to liquid?
gas is @ higher energy state than liq. so the transition must remove energy. so ans is  a. Energy must be removed because particles in liquid move more slowly.
 
        
                    
             
        
        
        
Answer:



Explanation:
The speed of the rocket is given the Tsiolkovsky's differential equation, whose solution is:

Where:
 - Initial speed of the rocket, in m/s.
 - Initial speed of the rocket, in m/s.
 - Exhaust gas speed, in m/s.
 - Exhaust gas speed, in m/s.
 - Initial total mass of the rocket, in kg.
 - Initial total mass of the rocket, in kg.
 - Current total mass of the rocket, in kg.
 - Current total mass of the rocket, in kg.
Let assume that fuel is burned linearly. So that,

The initial total mass of the rocket is:

The fuel consumption rate is:


The function for the current total mass of the rocket is:

The speed function of the rocket is:

The speed of the rocket at given instants are:


