Answer:
800 N/C to the right
Explanation:
The relationship between electric force, electric field and charge is
where
E is the electric field
F is the force acting on the charge
q is the charge
In this problem, we have
is the force
is the charge
Substituting into the formula, we find the electric field magnitude
Concerning the direction:
- The electric field and the force have same directions if the charge is positive
- The electric field and the force have opposite directions if the charge is negative
Here the charge is positive, so the electric field has same direction as the force: therefore, to the right.
Answer:
In contrast, in the 1918 pandemic, the flu had a higher mortality and morbidity rate, considering as the worst that it not only affected the elderly but also affected many children and adolescents.
Explanation:
In the 2009-2010 pandemic called influenza A, 19 million people died, which after that in June of that same year, the vaccine was launched, which saved many lives, and the morbidity rate was 30 40%.
Answer:
B.0 N
Explanation:
Based on the description of the free-body diagram, there are only two forces acting on the child sitting on the seat:
- The force of gravity, Fg=-100 N, in the downward direction
- The normal reaction of the chair on the child, Fn=100 N, in the upward direction
The two forces have same magnitude but in opposite directions, so the net force (resultant of the two forces) is zero:
Answer:
1.429*10^-5 m
Explanation:
From the question, we are given that
Diameter of the cable, d = 3 cm = 0.03 m
Force on the cable, F = 2 kN
Young Modulus, Y = 2*10^11 Pa
Area of the cable = πd²/4 = (3.142 * 0.03²) / 4 = 0.0028 / 4 = 0.0007 m²
The fractional length = Δl/l
Δl/l = F/AY
Δl/l = 2000 / 0.0007 * 2*10^11
Δl/l = 2000 / 1.4*10^8
Δl/l = 1.429*10^-5 m
Therefore, the fractional length is 1.429*10^-5 m long