Answer:
The film in a camera be is placed at a distance of 3.67 cm.
Explanation:
Given that,
Focal length of the lens, f = +35 mm = +3.5 cm
Object distance of the flower, u = -75 cm
Using lens formula to find the distance from the lens must the film in a camera be. Using lens formula as :
So, the film in a camera be is placed at a distance of 3.67 cm.
The population comes to be dominated by smaller, slower-growing individuals
Answer:
q = 4.04×10^-12C
n = 2.53×10^7
Explanation:
1. Electrostatic force on charge due to electrical field E is F = qE
Gravitational force due to weight of drop of mass M is F = mg, when net force is zero we have to find the charges on the drop.
2. Charge on drop: since gravitational force is acting downward, electric field is acting upward and we equate both equations.
Therefore, Fg = Fe
qe = mg
q = mg/E
q = 3.50×10^-9kg×9.8m/s²/8480N/c
q = 4.04 × 10^-12
3. Number of protons by quantitization law
n = q/e
n = 4.04× 10^-12/8480
n = 2.53× 10^7
