Answer:
time spent = 0.2276 
Explanation:
given data 
distance = 135 mi
usual speed = 65 mph
today speed = 73 mph
solution
we get here time that is express as 
time =  ...................1
    ...................1
usual time =  = 2.0769 h
  = 2.0769 h
today time =  = 1.8493 h
 = 1.8493 h
so we get here time spent as 
time spent = 2.0769 h - 1.8493 h 
time spent = 0.2276 
 
        
             
        
        
        
Answer: A pendulum is an object hung from a fixed point that swings back and forth under the action of gravity. 
Example: playground swing
 
        
             
        
        
        
1. Frequency  is the number of complete waves that pass a point in a second.   2.Wavelength is the distance between two crests or two troughs.                     3.Time period <span> is the time it takes for one complete wave to pass a given point. 4. Amplitude is the height of the wave.   Hence option 4 is correct. </span>
        
             
        
        
        
Given that,
Time = 0.5 s
Acceleration = 10 m/s²
(I). We need to calculate the speed of apple
Using equation of motion

Where, v = speed
u = initial speed
a = acceleration
t = time
Put the value into the formula


(III). We need to calculate the height of the branch of the tree from the ground
Using equation of motion

Put the value into the formula


(II). We need to calculate the average velocity during 0.5 sec
Using formula of average velocity


Where,  = final position
= final position
 = initial position
 = initial position
Put the value into the formula


Hence, (I). The speed of apple is 5 m/s.
(II). The average velocity during 0.5 sec is 2.5 m/s
(III). The height of the branch of the tree from the ground is 1.25 m.