Answer:
Magnetic force, from north to south.
Explanation:
It is given that,
Mass of the ball, m = 140 g = 0.14 kg
Number of electrons,
Height, h = 110 m
Charge, q = ne
Magnetic field, B = 0.3 T
The potential energy at height of 110 meters is balanced by the kinetic energy as per the law of conservation of energy as :
Magnetic force is given by :
F = q v B
As the direction of magnetic field is from east to west, so from right hand thumb rule the direction of magnetic force is from north to south. Hence, this is the required solution.
C. 7, 5 solar and 2 lunar eclipses or 2 solar and 5 lunar eclipses
Answer:
0.52 N
Explanation:
k = 13 N/m
x = 0.04 m
Plug those values into Hooke's Law:
F = kx
F = (13 N/m)(0.04 m)
F = 0.52 N
The thermal process that occurs when pressure and volume are variable, while the temperature remains constant is known as an isothermal process. Due to the change in temperature being zero, the internal energy of the system does not change. Isothermal processes can be carried out adiabatically or non-adiabatically. (An adiabatic process is where the heat energy moving through the boundary of a system is 0)
1) Let's call
the speed of the southbound boat, and
the speed of the eastbound boat, which is 3 mph faster than the southbound boat. We can write the law of motion for the two boats:
2) After a time
, the two boats are
apart. Using the laws of motion written at step 1, we can write the distance the two boats covered:
The two boats travelled in perpendicular directions. Therefore, we can imagine the distance between them (45 mi) being the hypotenuse of a triangle, of which
and
are the two sides. Therefore, we can use Pythagorean theorem and write:
Solving this, we find two solutions. Discarding the negative solution, we have
, which is the speed of the southbound boat.