Answer:
Acceleration = 5.77 m/s²
Distance cover in 13 seconds = 487.56 meter
Explanation:
Given:
Final velocity of mobile device = 75 m/s
initial velocity of mobile device = 0 m/s 
Time taken = 13 seconds
Find:
Acceleration
Distance cover in 13 seconds
Computation:
v = u + at
75 = 0 + (a)(13)
13a = 75
a = 5.77
Acceleration = 5.77 m/s²
s = ut + (1/2)(a)(t²)
s = (0)(t) + (1/2)(5.77)(13²)
Distance cover in 13 seconds = 487.56 meter
 
        
             
        
        
        
Answer: 
The ball impact velocity i.e(velocity right before landing) is 6.359 m/s
Explanation:
This problem is related to parabolic motion and can be solved by the following equations:
 ----------------------(1)
----------------------(1)
 ---------(2)
---------(2)
 ----------------------- (3)
 ----------------------- (3)
Where:
x = m is the horizontal distance travelled by the golf ball
 is the golf ball's initial velocity
 is the golf ball's initial velocity
 is the angle (it was  a horizontal shot)
 is the angle (it was  a horizontal shot)
t is the time
y is the final height of the ball
 is the initial height of the ball
 is the initial height of the ball
g is the acceleration due gravity
V is the final velocity of the ball
Step 1: finding t 
Let use the equation(2)


 s
s 
Substituting (6) in (1):
 -------------------(4)
-------------------(4)
Step 2:  Finding  :
:
From equation(4)


 m/s (8)
 m/s (8)  
Substituting  in (3):
 in (3):
 
 
v =42 .01 - 15.3566  
V=26.359 m/s
 
        
             
        
        
        
Answer:
Net forces which pushes the window is 30342.78 N.
Explanation:
Given:
Dimension of the office window.
Length of the window =  m
 m
Width of the window =  m
 m
Area of the window = 
Difference in air pressure = Inside pressure - Outside pressure 
                                            =  atm =
 atm =  atm
 atm
Conversion of the pressure in its SI unit.
⇒   atm =
 atm =  Pa
 Pa
⇒  atm =
 atm =  Pa
 Pa
We have to find the net force.
We know,
 ⇒ Pressure = Force/Area
⇒ 
⇒ 
⇒ Plugging the values.
⇒  
 
⇒  Newton (N)
 Newton (N)
So,
The net forces which pushes the window is 30342.78 N.
 
        
             
        
        
        
Conductors allow<span> for </span>charge<span> transfer </span>through<span> the free movement of </span><span>electrons
</span>