Answer:
51 dioptre
Explanation:
u = Object distance = 2 cm
v = Image distance = 1 m
f = Focal length
Lens Equation
Power of lens
Power of the eye lens is 51 dioptre.
Answer:
139.4 N
Explanation:
from the question we are given the following
distance (s) = 1 m
time (t) = 1.7 s
power (p) = 82 W
force (f) = ?
we can get the force by applying the formula below
power = work done / time
where work done = force x distance
therefore power = (force x distance ) / time
82 = (f x 1) / 1.7
f = (82 x 1.7) / 1 = 139.4 N
We need the frequency of the photon, it is v = c/ λ
Where c is 3 x 10^8 ms^-1 and λ
is the wave length
We also need the expression of
connecting frequency to energy of photon
which is E = hv where h is Planck’s
constant
Combining the two equations
will give us:
E = h x c/λ
Inserting the values, we will
have:
E = 6.626 x 10^-34 x 3 x 10^8 /
0.126
E = 1.578 x 10^ -24 J
Acceleration = ( final velocity - intial velocity ) / time
= (60-0)m/s / 3s
= 20 m/s2
the answer is a
atom ................................................... sorry for the periods