A car accelerates from rest to a velocity of 5 meters/second in 4 seconds. What is its average acceleration over this period of
2 answers:
Answer:
Its acceleration is 1.25 meters/second2 ( )
Explanation:
Acceleration is defined as the rate of change of velocity per unit time:
where
v is the final velocity
u is the initial velocity
t is the time taken
In this problem, the initial velocity of the car is zero: u=0. The final velocity is v=5 m/s, and the time taken is t=4 s, so the acceleration is
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Answer:
r = 1.45 Å
Explanation:
given,
λ = 1.436 Å
θ = 20.62°
d = a
n = 2
metal gold crystallizes in a face centered cubic unit cell
Radius of the gold atom = ?
using Bragg's Law
n λ = 2 d sin θ
2 x 1.436 Å = 2 a sin 20.62°
a = 4.077 Å
We know relation of radius for face centered cubic unit cell
r = 1.45 Å
the radius of a(n) gold atom. is equal to 1.45 Å
Answer:
wavelength is equivalent to the velocity divided by the frequency