It could be radiation because radiation means <span>the emission of energy as electromagnetic wave, but potential fits it best</span>
        
             
        
        
        
Answer:
The  magnitude of F1 is

The magnitude of F2 is

And the direction of F2 is

Explanation:
<u>Net Force
</u>
Forces are represented as vectors since they have magnitude and direction. The diagram of forces is shown in the figure below.  
The larger pull F1 is directed 21° west of north and is represented with the blue arrow. The other pull F2 is directed to an unspecified direction (red arrow). Since the resultant Ft (black arrow) is pointed North, the second force must be in the first quadrant. We must find out the magnitude and angle of this force.  
Following the diagram, the sum of the vector components in the x-axis of F1 and F2 must be zero:

The sum of the vertical components of F1 and F2 must equal the total force Ft

Solving for  in the first equation
 in the first equation






The  magnitude of F1 is

The magnitude of F2 is

And the direction of F2 is

 
        
             
        
        
        
Answer:
16 kg
Explanation:
M - container 
m - oil mass
by definition of density ,
relative density is the ratio of the density of a substance to the density of water.
relative density = density/ density of water
density of oil = 1.2*1000 kgm⁻³  = 1200 kgm⁻³ 
1 Litre =10⁻³ m³
oil volume = 80 *10⁻³ m³
mass of oil = density * volume
                    = 1200*80*10⁻³
                    = 96 kg
Mass of container + mass of  oil =112
mass of container = 112 - 96
                               = 16 kg
 
        
             
        
        
        
Exercise is the answer hope i helped you 
        
             
        
        
        
Answer:
fo = 378.52Hz
Explanation:
Using Doppler effect formula:

where
f' = 392 Hz
C = 340m/s
Vb = 20m/s
Va = 31m/s
Replacing these values and solving for fo:
fo = 378.52Hz