Answer:
The magnitude of the magnetic field is 7.49x10⁻⁶T
Explanation:
The magnetic field is:

Where
i = current = 3 A
R = radius = 2.4 cm = 0.024 m
r = distance = 0.72 cm = 7.2x10⁻³m
Replacing:

Assuming the raindrop was stationary relative to the vertical distance to the ground at the start:
D=0.5at where d is distance, a is acceleration and t is time
D is 300 meters
a is 9.8 meter/sec squared
Solve for t in seconds
t = 61.2 seconds
v=at where v is velocity
a is 9.8 meters per second squared
t is 61.2 seconds
solve for v
v = 600 meters per second.
If it had an initial vertical velocity (v0) at the start :
d= 0.5at+v0t
and
v=at+v0
Answer:
(a). The power delivered to the element is 187.68 mW
(b). The energy delivered to the element is 57.52 mJ.
Explanation:
Given that,
Charge 
Voltage 
Time t = 0.3 sec
We need to calculate the current
Using formula of current

Put the value of charge



(a).We need to calculate the power delivered to the element
Using formula of power

Put the value into the formula



Put the value of t



(b). We need to calculate the energy delivered to the element between 0 and 0.6 s
Using formula of energy

Put the value into the formula





Hence, (a). The power delivered to the element is 187.68 mW
(b). The energy delivered to the element is 57.52 mJ.
Answer:
b
Explanation:
n = m(g +a)
n= normal force (N)
m=mass (kg)
g=acceleration of gravity
a= acceleration of elevator
rearrange:
a= n/m - g
a= (810 N/73 kg) - 9.8 m/s ^2
a= 1.3 m/s ^2 up
and the acceleration is upwards bc her weight is less than the scale reading
Answer:


Explanation:
As we know that the magnitude of electric field intensity is given as

now we know that intensity of the wave is given as the product of energy density and speed of the wave



so intensity is the energy flow per unit area per unit of time
so the energy that flows through the area of 0.0259 m^2 in 11.7 s is given as


