Answer:
C. The concentration of the copper sulfate is too low
Explanation:
 
        
                    
             
        
        
        
Answer:
246.28 K
Explanation:
The total energy of one mole of gas molecules can be calculated by the formula given below 
E = 
Where R is gas constant and T is absolute temperature.
Put the value of R as 8.314 and temperature as 245 , we get
E = 
= 3055.4 J
Add 16 j to it 
Total energy of gas molecules = 3055.4 + 16 = 3071.4 J.
If T be the temperature after addition of energy then 
 = 3071.4
 = 3071.4
T =
T = 246.28 K
 
        
             
        
        
        
Answer:
1. 0.45 s. 
2. 4.41 m/s
Explanation:
From the question given above, the following data were obtained:
Height (h) = 1 m
Time (t) =? 
Velocity (v) =? 
1. Determination of the time taken for the pencil to hit the floor. 
Height (h) = 1 m
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) =? 
h = ½gt²
1 = ½ × 9.8 × t²
1 = 4.9 × t²
Divide both side by 4.8
t² = 1/4.9
Take the square root of both side 
t = √(1/4.9) 
t = 0.45 s. 
Thus, it will take 0.45 s for the pencil to hit the floor. 
2. Determination of the velocity with which the pencil hit the floor. 
Initial velocity (u) = 0 m/s 
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) = 0.45 s. 
Final velocity (v) =?
v = u + gt 
v = 0 + (9.8 × 0.45)
v = 0 + 4.41
v = 4.41 m/s
Thus, the pencil hit the floor with a velocity of 4.41 m/s
 
        
             
        
        
        
<span>Data:
mass = 
110-g bullet 
d = 0.636 m 
Force =
13500 + 11000x - 25750x^2, newtons. 
a) Work, W
W = ∫( F* )(dx) =∫[13500+ 11000x - 25750x^2] (dx) =
W =  13500x + 5500x^2 - 8583.33 x^3 ] from 0 to 0.636  = 
W = 8602.6 joule
b) x= 1.02 m
</span><span><span>W =  13500x + 5500x^2 - 8583.33 x^3 ] from</span> 0 to 1.02
W = 10383.5
c) %
[W in b / W in a] = 10383.5 / 8602.6 = 1.21 => W in b is 21% more than work in a.
</span>
        
             
        
        
        
The force on the object has a constant strength, but its direction 
keeps changing.  The force is always directed from the object to 
the center of the circle.  It's called "centripetal force".