Always, whether we notice it or not. It's a law of nature.
 
        
             
        
        
        
Electromagnetic wave bc I studied that early in the year
        
             
        
        
        
Answer:
A. 69.9m
Explanation:
Given parameters: 
Initial velocity = 10.5m/s 
Final velocity  = 21.7m/s 
Time  = 4.34s 
Unknown: 
Distance traveled = ? 
Solution: 
Let us first find the acceleration of the car;
   Acceleration  =  
 
   v is final velocity 
    u is initial velocity 
    t is the time
      Acceleration  =  = 2.58m/s²
   = 2.58m/s²
 Distance traveled;
      V² = U² + 2aS 
     21.7² = 10.5² + 2 x 2.58 x S
    360.64 = 2 x 2.58 x S
      S = 69.9m
 
        
             
        
        
        
A) We differentiate the expression for velocity to obtain an expression for acceleration:
v(t) = 1 - sin(2πt)
dv/dt = -2πcos(2πt)
a = -2πcos(2πt)
b) Any value of t can be plugged in as long as it is greater than or equal to 0. 
c) we integrate the expression of velocity to find an expression for displacement:
∫v(t) dt = ∫ 1 - sin(2πt) dt
x(t) = t + cos(2πt)/2π + c
x(0) = 0
0 = = + cos(0)/2π + c
c = -1/2π
x(t) = t + cos(2πt)/2π -1/2π
        
             
        
        
        
The equivalent resistance when two resistors are connected in series is 
the sum of their individual resistances.
The marking on the resistor that says "1000 W" is the rating that tells 
how much power the resistor can safely dissipate, without overheating 
or exploding. (The 'W' stands for 'Watts'.)  It doesn't tell us anything about 
their individual resistances. So we don't have enough information to calculate 
their series equivalent.