If the question is true or false then the answer is true
Answer:
Explanation:
Initial velocity in air, Vo = 0 m/s
Final velocity in air, Vi = 16 m/s
Initial velocity in water, Vf = 3 m/s
Total distance, S = 127 m
Total time, T = 12 s
Using the equation of motion,
(V - U)t = s
S = s1 + s2
Let T = t1 + t2
127 = (16 × t1) + 3 × (12 - t1)
127 = 16t1 + 36 - 3t1
91 = 13t1
t1 = 91/13
= 7 seconds
Time taken in air, t1 = 7 seconds
t2 = 12 - 7
= 5 seconds.
Explanation :
Corrosion is the process of conversion of metal into its oxides, hydroxides and sulfides.
Rusting of iron is the process of corrosion in metals. Iron objects react with oxygen in the air and turned reddish. This reddish covering is Rust.
where, is iron
is oxygen present in atmosphere
and is rust or Ferric oxide.
In the given equation, and both are reactants and is a product.
Because they behave just like all the electromagnetic waves of the spectrum. Same equations, just shorter wavelengths and more energy.
Hope you get it :)
Answer:
Explanation:
a ) The motion is one dimensional , so motion is along x - axis , starting from origin ( 0 , 0 )
b ) Initial velocity is 18.5 m /s when boat is situated at origin . When he displaces by 250 m along x axis and his position is ( 250 , 0 ) along x axis , his velocity becomes 36 m /s . Both his velocity and acceleration is along x - axis.
c ) Initial velocity vi = 18.5 m /s
final velocity vf = 36 m/s
Displacement x = 250 m
Acceleration a = ?
Most appropriate formula is given below .
vf² = vi² + 2 a x
2ax = vf² - vi²
x = ( vf² - vi² ) / 2 a
d )
Putting the given values
36² - 18.5² / 2 x 250
= 1296 - 342.25 / 500
= 1.9 m /s².
f ) Time interval t = ?
Required formula
vf = vi + at
t = (vf - vi ) / a
Putting the values
t = (30 - 18.5) / 1.9
= 6.05 second .