Answer:
<h2>3.3 J</h2>
Explanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 10 m/s²
From the question we have
PE = 1.5 × 10 × 0.22
We have the final answer as
<h3>3.3 J</h3>
Hope this helps you
 
        
             
        
        
        
Ball 4 because the higher the elevation is the greater the potential energy it has
        
             
        
        
        
Answer: 
Explanation:
Given
Charge discharged 
time taken 
Current is given as rate of change of discharge i.e.

Therefore, the average current is 
 
        
             
        
        
        
Choices 'C' and 'D' are both correct.
(Except in 'C', changing the temperature from 1°C to 3°C is not usually 
described as 'cooling', and it's not the water's 'mass' that changes.  But 
water does contract in volume during that change.)
        
             
        
        
        
Answer:
a. λ = 647.2 nm 
b. I₀  9.36 x 10⁻⁵
Explanation:
Given: 
β = 56.0 rad , θ = 3.09 ° , γ = 0.170 mm = 0.170 x 10⁻³ m 
a. 
The wavelength of the radiation can be find using 
β = 2 π / γ * sin θ 
λ = [ 2π * γ * sin θ ] / β 
λ = [ 2π * 0.107 x 10⁻³m * sin (3.09°) ] / 56.0 rad 
λ = 647.14 x 10⁻⁹ m  ⇒  λ = 647.2 nm 
b. 
The intensity of the central maximum I₀ 
I = I₀ (4 / β² ) * sin ( β / 2)² 
I = I₀ (4 / 56.0²) * [ sin (56.0 /2) ]²
I = I₀  9.36 x 10⁻⁵