The stopwatch will be the most useful in determining the kinetic energy of a 50 g battery- powered car traveling a distance of 10 m. 
<h3>What is kinetic energy?</h3>
Kinetic energy is the energy of a body possessed due to motion. 
This means that for an object to possess kinetic energy, it must be in motion. 
The kinetic energy is measured in Joules, which is a product of the mass of the substance and the time taken to travel a distance. 
A stopwatch is an instrument used to measure time as one of the components of kinetic energy. 
Therefore, the stopwatch will be the most useful in determining the kinetic energy of a 50 g battery- powered car traveling a distance of 10 m.
Learn more about kinetic energy at: brainly.com/question/12669551
 
        
             
        
        
        
If a surface looks "shiny" to you, that's because it reflects all 
or most of the visible light that hits it.  That doesn't always mean 
that the same surface reflects other, non-visible wavelengths of 
light.  Infrared radiation may also reflect off of it, and probably 
does.  But you can't be sure just because it's visibly shiny.   
        
                    
             
        
        
        
Answer:
120 N
Explanation:
F=ma therefore 60kg times 2m/s^2 is 120 N
 
        
             
        
        
        
Answer:
1.24611
Explanation:
V = Velocity = 10 ft/s
L = Length = 2 ft
g = Acceleration due to gravity = 32.2 ft/s²
Froude number is given by

Converting to SI units




The Froude number is 1.24611
The Froude number is equal. The Froude number is dimensionless as the units cancel each other. In order for this to happen the units used need to be consitent either imperial or SI.
 
        
             
        
        
        
Answer:
As evolutionary biologists have shown, this multicellularity was linked to the rise in oxygen and thus played a significant role for life on Earth as it is today. ... By producing oxygen and evolving into multicellular forms, they played a key role in the emergence of organisms that breathe oxygen.
Explanation: