Apassenger train takes 2 hours less than a freight train takes to travel from norman to enid. the passenger train averages 96 km/hr, while the freight train averages 64 km/hr. what is the distance from norman to enid?

Passenger

r = 96 km/hr

t = t - 2

Freight

r = 64

t = t    You have to solve for t before you can solve for d

The distance is the same for both trains.

Formula

r_passenger_train * time_passenger = r_freight_train * time_freight

Solve

96 km/hr * (t - 2) = 64*t         the easiest way to go on is to divide by 96

(t - 2) = 64t/96

t - 2 = 0.667t                         Subtract 0.667t from both sides.

t - 0.667t - 2 = 0                   Add 2 to both sides. combine the two times

0.333t = 2                             Divide by  0.333

t = 2/0.333 = 6 hours

Answer

Now solve for the distance.

d_ passenger = r_passenger * t_passenger

d_passenger = ???

r_ passenger = 96

t = 6 - 2 = 4 hours.

d = 96 * 4

d = 384 km.

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia