Answer:
4
Explanation:
G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²
 = Mass of Earth
 = Mass of Earth
 = Mass of Moon
 = Mass of Moon
r = Distance between Earth and Moon
Old gravitational force

New gravitational force

Dividing the equations

The ratio is 
The new force would be 4 times the old force
 
        
             
        
        
        
Answer:
D. Battery
During the oxidation-reduction(redox) reaction, there is always flow of electrons from one point to another. The electrons are then converted to power through the battery which converts chemical energy to electrical energy. If there is zero flow of electrons then there will also be zero power.
 
        
                    
             
        
        
        
Answer:
Proportional
Explanation:
The conditions that must be met to produce SHM are;
-The restoring force must be proportional to the displacement and act opposite to the direction of motion with no drag forces or friction. 
- The frequency of oscillation does not depend on the amplitude.
 
        
             
        
        
        
Answer:
The answer is D.
Explanation:
There is no gravity in Space so that means that it will decrease your weight but not your mass.
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These applications DO NOT INVOLVE harmful ionizing energy:
 - MRI
 - ultrasound
 - laser surgery