C. air above the wing travels faster than air below the wing.
Answer: Hopefully 50trillion DNA strands
Speed is given as distance divided by time. I think that first you should simplify the two rates 58/2=29km/hr and 71/4=17.75km/hr After that find the mean or average which is (29+17.75)/2=23.375km/hr
Therefore it is safe to say that the average speed of the train is 23.375km/hr. I am not sure about this.
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.