Answer:
<h2>62.5 m/s</h2>
Explanation:
The speed of the car can be found by using the formula

d is the distance
t is the time
From the question we have

We have the final answer as
<h3>62.5 m/s</h3>
Hope this helps you
 
        
             
        
        
        
Answer:
Approximately  , assuming that the volume of these two charged objects is negligible.
, assuming that the volume of these two charged objects is negligible. 
Explanation:
Assume that the dimensions of these two charged objects is much smaller than the distance between them. Hence, Coulomb's Law would give a good estimate of the electrostatic force between these two objects regardless of their exact shapes.
Let  and
 and  denote the magnitude of two point charges (where the volume of both charged object is negligible.) In this question,
 denote the magnitude of two point charges (where the volume of both charged object is negligible.) In this question,  and
  and  .
.
Let  denote the distance between these two point charges. In this question,
 denote the distance between these two point charges. In this question,  .
.
Let  denote the Coulomb constant. In standard units,
 denote the Coulomb constant. In standard units,  .
.
By Coulomb's Law, the magnitude of electrostatic force (electric force) between these two point charges would be:
 .
.
Substitute in the values and evaluate:
 .
.
 
        
             
        
        
        
Answer:
a. when the acceleration of the objects become negative 
 
        
             
        
        
        
Answer:
0.0000109261200583 s
0.0109261200583
Explanation:
 = Distance from right ear = 3 m
 = Distance from right ear = 3 m
s = Distance between ears = 15 cm
v = Speed of sound in air = 343 m/s
Distance between the left ear and the bird

Time

Time difference would be

The time difference is 0.0000109261200583 s
Time period is given by

The ratio is

The ratio is 0.0109261200583
 
        
             
        
        
        
Answer:
When the object is placed at the focus the image is formed at infinity.
Explanation:
When a ray passes through focus and incident on a concave mirror then it will travel parallel to principal axis after reflection.Hence the image is formed at infinity.