Acceleration = vf-vi/t
8=vf-0/4
8=vf/4
vf=8×4
=32m/s
Given: Wavelength λ = 686 nm convert to meter λ = 6.86 x 10⁻⁷ m
Velocity of light c = 3.00 x 10⁸ m/s
Required: Frequency f = ?
Formula: f = c/λ
f = (3.00 x 10⁸ m/s)/(6.86 x 10⁻⁷ m)
f = 4.37 x 10¹⁴ Hz or
f = 437 Terahertz
I can't tell right away. The elevator's limit is given in terms of mass, but the four people are listed in terms of their weights. In order to compare them, we'll have to convert one or the other.
The total of the four people's weights is:
John . . . . . . . 850N
Betty . . . . . . . 530N
Robert . . . . . . 740N
Alice . . . . . . . .610N
Total . . . . . . 2,730N
The elevator can't accept more than 300 kg of mass.
The weight of any mass is (mass) x (gravity).
On Earth, 300kg weighs (300kg) x (9.8 m/s²) = 2,940 N.
Wonderful !
2,730N is less than 2,940N.
<em>Yes !</em> According to Otis' engineers, John, Betty, Robert and Alice <em>can safely ride the elevator together</em>, (although Betty and Alice may have a different opinion).
A good way to think about mental and emotional health is like a tag team. Mental health refers to your ability to process information. Emotional health, on the other hand, refers to your ability to express feelings which are based upon the information you have processed.