We got the following:
m = 78kg
h = 6m
g = 9.8 m/
≈ 10 m/
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A = ?
As we know A = Ep = mgh -> potential energy
so the answer would be A = 78 * 6 * 10 = 4680 Joule
Answer:
Explanation:
#Consider a circular area of radius 
in the xy-plane at z=0. This means all the are vector points toward the +ve z-axis.
a. first, find the magnetic flux if the magnetic field has a magnitude of 
and points toward the +ve z-axis. The angle between the magnetic field and the area is 
. Hence the magnetic flux:-
Hence flux magnitude in 
direction is 
b. We now find the magnetic flux when the field has a magnitude of <em>B=0.230T</em> and points at an angle of 
from the direction.
Magnetic flux is calculated as:
Hence the flux at an angle of 
is 
c. We now need to find the magnetic flux if the field has a magnitue of B=0.230T and points in the direction of +y-direction. As with the previous parts, the magnetic flux will be calculated as:
Hence the magnetic flux in the +y-direction is zero.
Answer:
To reduce pressure - decrease the force or increase the area the force acts on. If you were standing on a frozen lake and the ice started to crack you could lie down to increase the area in contact with the ice. The same force (your weight) would apply, spread over a larger area, so the pressure would reduce.
Answer:
P = 9800 [Pa]
Explanation:
In order to calculate the pressure at the bottom, we must use the following formula.
P = Ro*g*h
where:
P = pressure [Pa] (units of pascals)
Ro = density of the water = 1000 [kg/m³]
g = gravity acceleration = 9.8 [m/s²]
h = height = 1 [m] (because its half of the portion, the full height is 2 m)
P = 1000*9.8*1
P = 9800 [Pa]
Answer:
Explanation:
Natural length of the string is given as
length of the string while block is hanging on it
extension in length is given as
now we have strain in the string is given as
similarly we will have cross-sectional area of the string is given as
now the stress in the string is given as
Now Young's Modulus is given as
