Answer:
The maximum value of the magnetic field in the wave is .
Explanation:
Given that,
Average value of pointing vector = 0.724 W/m²
We need to calculate the magnetic field
Using formula of pointing vector
The average value of pointing vector
....(I)
We know that,
Put the value of in equation (II)
Put the value into the formula
Hence, The maximum value of the magnetic field in the wave is .
Particle kinetic energy and particle speed
Water cycle, evaporation, condensation, and freezing
Answer:
<em>45.375m</em>
Explanation:
To get the distance travelled by the body we will use the equation of motion
S = ut + 1/2at²
u is the initial speed = 0m/s
a is the acceleration
t is the time = 5 seconds
We need to get the acceleration first:
According to Newton's second law,
Fm is the moving force = Wsin theta
Ff is the frictional force = 1500N
m is the mass = W/g
m = 4000/9.8
m = 408.16kg
Substitute the given values in the formula and get the acceleration:
Get the required distance:
Recall that S = ut+1/2at²
S = 0(5) + 1/2*3.63*5²
S = 0+0.5*3.63*25
S = 45.375m
<em>Hence the distance travelled by the body in 5 seconds if the force of friction is 1500N is 45.375m</em>