<u>Answer</u>
D) 3100 Liters
<u>Explanation</u>
To get the volume if the balloon you need to use the combined equation of the low of gases. 
P₁V₁/T₁ = P₂V₂/T₂
(20×150)/(27+273) = (1×V₂)/(37+273)
3000/300 = V₂/310
10 = V₂/310
V₂ = 10 × 310
     = 3100 Liters
 
        
                    
             
        
        
        
The object's mass is around 69.592 kg
F=mg
        
             
        
        
        
Answer:

Explanation:
Given that,
Pressure, P = 1 atm = 101325 Pa
Area of the square surface, A = 10² = 100 m²
We need to find the mass of vertical column of air. We know that, pressure is equal to the force acting per unit area. So,

So, the required mass of the vertical column of air is  .
.
 
        
             
        
        
        
Answer:
v₂ = 176.24 m/s
Explanation:
given,
angle of projectile = 45°
speed = v₁ = 150 m/s
for second trail 
speed = v₂ = ? 
angle of projectile = 37°
maximum height attained formula,
 
now, 
 
 
now, equating both the equations


    v₂² = 31061.79
    v₂ = 176.24 m/s
velocity of projectile would be equal to v₂ = 176.24 m/s
 
        
             
        
        
        
D
The exact location of electrons in electron shells of atoms cannot be exactly ascertained. This is why VSPER atomic models represent the position of electrons (s, p, d, & f) using the probability of where they would most be expected to be found. 
Explanation:
This is because merely observing electrons changes their behavior. Remember that to observe something one has to shine light on it so it bounces back to the eye. Due to the negligible mass of electrons, mere photons of light will change their direction of movement, spin or other behaviors/properties. 
Learn More:
For more on electron clouds check out;
brainly.com/question/12199882
brainly.com/question/11686000
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