The car traverses a distance  after time
 after time  according to
 according to

where  is its acceleration, 10 m/s^2. The time it takes for the car to travel 25 m is
 is its acceleration, 10 m/s^2. The time it takes for the car to travel 25 m is

5 is pretty close to 4, so we can approximate the square root of 5 by 2. Then the car's velocity  after 2 s of travel is given by
 after 2 s of travel is given by

which makes C the most likely answer.
 
        
             
        
        
        
<h2>
After 26.28 seconds projectile returns 26.28 seconds.</h2>
Explanation:
Initial velocity = 450 ft/s = 137.16 m/s
Angle, θ = 70°
Consider the vertical motion of projectile,
When the projectile return to the ground we have
            Displacement, s = 0 m
            Acceleration, a = -9.81 m/s²
             Initial velocity, u = 137.16 x sin70 = 128.89 m/s
Substituting in s = ut + 0.5 at²
                 s = ut + 0.5 at²
                 0 = 128.89 x t + 0.5 x (-9.81) x t²
                 t² - 26.28 t = 0 
                 t ( t- 26.28) = 0
                t = 0 s or t = 26.28 s
After 26.28 seconds projectile returns 26.28 seconds.
 
        
        
        
Answer:
Equation for SHM can be written 
V = w A cos w t        where w is the angular frequency and the velocity is a                                         maximum at t = 0
V1 = w1  A cos w1 t
V2 = w2 A cos w2 t
V2 / V1 = w2 / w1     since cos X t = 1 if t = zero
V2 / V1 = 2 pi f2 / (2 pi f1) = f2 / f1 = T1 / T2
If the velocity is twice as large the period will be 1/2 long
 
        
             
        
        
        
Answer:
To write the general formula for an acid, we fix one atom which is hydrogen because this atom is common to all the acids. General formula for acid is written by HX. where H represents Hydrogen atom.
Explanation: