Answer:
the intercepts of a graph are point at which the graph crosses the axes 
 
        
             
        
        
        
Answer: 11369.46 m/s
Explanation:
We have the following data:
 is the mass of the bowling ball
 is the mass of the bowling ball
 is the velocity of the bowling ball
 is the velocity of the bowling ball
 is the mass of the ping-pong ball
 is the mass of the ping-pong ball
 is the velocity of the ping-pong ball
 is the velocity of the ping-pong ball
Now, the momentum  of the bowling ball is:
 of the bowling ball is:
 (1)
 (1)
 
  
 (2)
 (2)
And the momentum  of the ping-pong ball is:
 of the ping-pong ball is:
 (3)
 (3)
If the momentum of the bowling ball is equal to the momentum of the ping-pong ball:
 (4)
 (4)
 (5)
 (5)
Isolating  :
:
 (6)
 (6)
 (7)
 (7)
Finally:

 
        
             
        
        
        
<u>Answer</u>
8. 2 Hz
9. 0.5 seconds
10. 20 cm
<u>Explanation</u>
<u>Q 8</u>
Frequency is the number of oscillation in a unit time. It is the rate at which something repeats itself in a second. 
In this case, the spring bob up and down 2 times per second.
∴ Frequency = 2 Hz
<u>Q 9</u>
Period is the time taken to complete one oscillation. 
2 oscillations takes 1 second
1 oscillation = 1/2 seconds.
∴ Period = 0.5 seconds
<u>Q 10</u>
Amplitude is the the maximum displacement of the spring. 
In this case the spring bob up 20 cm. This is it's displacement.
∴ Amplitude = 20 cm
 
        
             
        
        
        
Answer: 
A) 0.660 g/ml
B) 1.297 ml
C) 0.272 g
Explanation:
Every substance, body or material has mass and volume, however the mass of different substances occupy different volumes.  This is where density  appears as a  physical characteristic property of matter that establishes a relationship between the mass
 appears as a  physical characteristic property of matter that establishes a relationship between the mass  of a body or substance and the volume
 of a body or substance and the volume  it occupies:
 it occupies:
 (1)
 (1)
Knowing this, let's begin with the answers:
<h2 /><h2>Answer A:</h2>
Here the mass is  and th volume
 and th volume  
 
Solving (1) with these values:
 (2)
 (2)
 (3)
 (3)
<h2>Answer B:</h2>
In this case the mass of a sample is  and its density is
 and its density is  .
. 
Isolating  from (1):
 from (1):
 (4)
 (4)
 (5)
 (5)
 (5)
 (5)
<h2>Answer C:</h2>
In this case the volume of a sample is  and its density is
 and its density is  .
. 
Isolating  from (1):
 from (1):
 (6)
 (6)
 (7)
 (7)
 (8)
 (8)
 
        
                    
             
        
        
        
Answer:
500 N
Explanation:
Natural bouyency will keep the diver in the same place, no matter what the mass of gfs. This means if the diver is displacing with a weight of 500 N, the upthrust will also be 500 N.