Answer:
6
Explanation:
Following are the possible transition
1 ) 4 to 3
2) 4 to 2
3) 4 to 1
4 ) 3 to 2
5 ) 3 to 1
6 ) 2 to 1 .
There are altogether 6 wavelengths of photons possible .
This result can be achieved with the help of permutation and combination.
No of ways in which 2 things can be selected out of 4 things , combination being all different.
₂C⁴ = (4 X 3) / 2 = 6.
Answer:
F = m a, a = 0.3 m / s²
this acceleration points in the direction of the unbalanced force
Explanation:
In this problem we must use Newton's second law. Let's fix a reference system with the x axis parallel to the surface and the y axis perpendicular
Y axis y
N-W = 0
N = W = mg
X axis
∑ F = m a
F = m a
we substitute
150 = m a
To find an acceleration value, the mass of the car must be known, if the mass is m = 500 kg
a = 150/500
a = 0.3 m / s²
this acceleration points in the direction of the unbalanced force
Answer:
the power used by the person is 10 W.
Explanation:
Given;
weight lifted, W = 50 N
distance through which the weight was lifted, d = 2 m
time of motion, t = 10 s
The power used by the person is calculated as;
Therefore, the power used by the person is 10 W.
