Answer:
b: false
Explanation:
It's true that endothermic reactions absorb heat from their surrounding.  But this makes the surroundings cooler, not warmer.
 
        
             
        
        
        
Answer:
Radiation is the emission or transmission of energy in the form of waves.
Explanation:
.
 
        
                    
             
        
        
        
False. Inertia and mass is not described in Newton’s second law of motion but in Newton’s first law of motion. Newton’s first law of motion or sometimes referred to as the law of inertia. In Newton’s first law indicates that an object at rest will remain at rest unless acted by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
        
             
        
        
        
Answer:
    = ( ρ_fluid g A) y
 = ( ρ_fluid g A) y
Explanation:
This exercise can be solved in two parts, the first finding the equilibrium force and the second finding the oscillating force
for the first part, let's write Newton's equilibrium equation
         B₀ - W = 0
         B₀ = W
         ρ_fluid g V_fluid = W
the volume of the fluid is the area of the cube times the height it is submerged
       V_fluid = A y  
For the second part, the body introduces a quantity and below this equilibrium point, the equation is
         B - W = m a
         ρ_fluid g A (y₀ + y) - W = m a
         ρ_fluid g A y + (ρ_fluid g A y₀ -W) = m a
        ρ_fluid g A y + (B₀-W) = ma
the part in parentheses is zero since it is the force when it is in equilibrium
       ρ_fluid g A y = m a
       this equation the net force is
        = ( ρ_fluid g A) y
 = ( ρ_fluid g A) y
we can see that this force varies linearly the distance and measured from the equilibrium position
 
        
             
        
        
        
Answer:
h = 4.04 m
Explanation:
Given that,
Mass of a child, m = 25 kg
The speed of the child at the bottom of the swing is 8.9 m/s
We need to find the height in the air is the child is able to swing. Let the height is h. Using the conservation of energy such that,

Put all the values,

So, the child is able to go at a height of 4.04 m.