Answer:
speed is the rate of change in distance thus it is scalar physical quantity 
while velocity is the rate of change in displacement thus it is a vector physical quantity 
Explanation:
vector physical quantity: is a quantity that requires both magnitude and direction to identify 
 scalar quantity: requires only magnitude to identify. 
 
        
             
        
        
        
Answer:
The magnification of an astronomical telescope is -30.83.
Explanation:
The expression for the magnification of an astronomical telescope is as follows;

Here, M is the magnification of an astronomical telescope,  is the focal length of the eyepiece lens and
 is the focal length of the eyepiece lens and  is the focal length of the objective lens.
 is the focal length of the objective lens.
It is given in the problem that an astronomical telescope having a focal length of objective lens 74 cm and whose eyepiece has a focal length of 2.4 cm.
Put  and
 and  in the above expression.
 in the above expression.

M=-30.83
Therefore, the magnification of an astronomical telescope is -30.83.
 
        
             
        
        
        
The answer I'm going with is false
        
                    
             
        
        
        
Answer:
A
Explanation:
They drove 30km north. The displacement adds up to 25km therefore making the distance greater
Hope this helps!
 
        
             
        
        
        
Because field lines don’t all go in to the pole. The bottom half go outwards not inwards.