Answer:
14 m/s
Explanation:
u = 0, h = 10 m, g = 9.8 m/s^2 
Use third equation of motion
v^2 = u^2 + 2 g h 
Here, v be the velocity of ball as it just strikes with the ground
v^2 = 0 + 2 x 9.8 x 10 
v^2 = 196
v = 14 m/s
 
        
             
        
        
        
This had to do with gain power and trade inequality business
        
             
        
        
        
Answer:
A. Mass(only) 
Explanation:
The correct answer is A because if the balloon is filled with air, it's filled with matter. Matter is anything that has space and occupies mass. The air occupies mass in the balloon but that doesn't mean that the balloon is heavier. People confuse themselves with mass and weight saying it means the same thing. Mass, like I said is the amount of matter an object contains whereas weight is how much an object weighs. 
 
        
                    
             
        
        
        
Answer:
D
Explanation:
speed = frequency x wavelength 
speed of light in vacuum is 3.0 x 10^8 
wavelength = 5.32 x10 ^-7
3.0 x 10 ^ 8 = 5.32 x 10^-7 x frequency 
frequency = 5.63909 x 10^14
 
round it off = 5.64 x 10^14 Hz 
thus the answer is D 
hope this helps please mark it 
 
        
             
        
        
        
The magnitude of the electrical force between a pair of charged particles is 4 Times as much when the particles are moved half as far apart.
This can be easily understood by Columb's law, 

which state's that the amount of electrical force experienced by two charged particles is inversely proportional to the square of the distance between them.
∴ 
Now, we know the new distance is half the original distance,


The electrical force of attraction or electrostatic force of attraction between two charged particles refers to the amount of attractive or repulsive force that exists between the two charges. This can be calculated by Columb's Law.
A charged particle in physics is a particle that has an electric charge. It might be an ion, such as a molecule or atom having an excess or shortage of electrons in comparison to protons. The same charge is thought to be shared by an electron, a proton, or another primary particle.
Learn more about electrical force here
brainly.com/question/2526815
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