Answer:
U = -3978.8 J
Explanation:
The work of the gravitational force U just depends of the heigth and is calculated as:
U = -mgh
Where m is the mass, g is the gravitational acceleration and h the alture.
for calculate the alture we will use the following equation:
h = L-Lcos(θ)
Where L is the large of the rope and θ is the angle.
Replacing data:
h = 12.2-12.2cos(58.4)
h = 5.8 m
Finally U is equal to:
U = -70(9.8)(5.8)
U = -3,978.8 J
Answer:
I= 3.5 amps
Explanation:
Step one:
given data
rating of resistor R= 8 ohms
power P= 100W
Required
The current I
Step two
Yet this power is also given by
make I subject of the formula we have
substitute
Answer:
M. Magnetism is a property of individual atoms.
Explanation:
when a magnet is broken into pieces the new pieces behave like the original magnet this observation shows that magnetism is the property of individual atoms.
Answer:
False
Explanation:
Vector has a magnitude and direction.
A scalar is just a magnitude or size.
Answer:
Magnetic dipole moment will be
Explanation:
We have given length of the cylinder , that is h = 5.51 cm = 0.051 m
And diameter of the cylinder d = 0.865 cm
So radius 
So volume of cylinder 
It is given there is uniform magnetization of 
We have to fond the dipole moment
Dipole moment is equal to 
, here M is magnetization and V is volume
So 
