Answer:
The combined speed of camper and canoe is 1.71 m/s. 
Explanation:
 Given that,
Mass of camper 1, m = 100 kg
Speed of camper 1, v = 3 m/s
The combined mass of another camper and canoe is, M = 175 kg
We need to find the combined speed of camper and canoe. According to the conservation of linear momentum, the momentum of first camper is equal to linear momentum of the canoe and the second camper.

So, the combined speed of camper and canoe is 1.71 m/s. 
 
        
             
        
        
        
well, you divide 4 by 5, so .8
.8 of a mile is 4224 feet. 
i really hope this helps :)
 
        
             
        
        
        
Answer:
The force of gravity
Explanation:
Gravity was studied, by early scientists such as Copernicus and others, Galileo was the first to ensure that planets moved according to a physical equation that depended on a force that caused celestial bodies to move and interact with each other. But years later Newton based on studies conducted deciphering what Galileo assumed, he was able to find the equation of the force of gravity in any body in the universe. This equation depends on the masses of the two interacting bodies, the distance between them and a constant, which I call universal gravitation constant.

Fg = gravity force [N]
G =  universal gravitation constant = 6.67*10^(-11) [N*m^2/kg^2]
m1 = mass of the 1st body [kg]
m2 = mass of the 2nd body [kg]
r = distance between the bodies [meters]
 
        
             
        
        
        
Answer:
mechanical energy per unit mass is 887.4 J/kg
power generated is 443.7 MW
Explanation:
given data 
average velocity = 3 m/s
rate = 500 m³/s
height h = 90 m
to find out 
total mechanical energy and power generation potential
solution
we know that mechanical energy is sum of potential energy and kinetic energy 
so 
E =  ×m×v² + m×g×h    .............1
×m×v² + m×g×h    .............1
and energy per mass unit is 
E/m =   ×v² + g×h
×v² + g×h
put here value
E/m =   ×3² + 9.81×90
×3² + 9.81×90
E/m = 887.4 J/kg
so mechanical energy per unit mass is 887.4 J/kg
and
power generated is express as 
power generated = energy per unit mass ×rate×density
power generated = 887.4× 500× 1000
power generated = 443700000 
so power generated is 443.7 MW
 
        
             
        
        
        
Answer:
c. You would weigh less on planet A because the distance between
you and the planet's center of gravity would be smaller.
Explanation:
The statement that best describes your weight on each planet is that you would weigh less on planet A because the distance between you and the planet's center of gravity would be smaller. 
- This is based on Newton's law of universal gravitation which states that "the force of gravity between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distances between them". 
Since weight is dependent on the force of gravity and mass, the planet with more gravitational pull will have masses on them weighing more.
- Since the distance between the person and the center of the planet is smaller, therefore, the weight will be lesser.