The force = 0.3 * 9.8 = 2.94
x = 0.13
k = 2.94/0.13
k = 22.6 N/m
Answer:
Object appears to move forward at 1 cm/sec, then the velocity drops to zero for 3 sec and then moves forward at 2 cm/sec (11 - 3) / (10 - 6) = 2 cm/sec
Answer:
Astronomical location of Mount St. Helen's is 46°12′01″N 122°11′22″O, meaning that such statovolcano is located at middle latitudes. In middle latitudes, troposphere is 17 kilometers high, which is below stratosphere, whose height is 10 kilometers at middle latitudes. Hence, the eruption of Mount St. Helen's in 1980 contiminated troposphere and lower parts of stratosphere due to volcanic ash.
Explanation:
Astronomical location of Mount St. Helen's is 46°12′01″N 122°11′22″O, meaning that such statovolcano is located at middle latitudes. In middle latitudes, troposphere is 17 kilometers high, which is below stratosphere, whose height is 10 kilometers at middle latitudes. Hence, the eruption of Mount St. Helen's in 1980 contiminated troposphere and lower parts of stratosphere due to volcanic ash.
Answer:
The net force on the middle wire will be zero.
Explanation:
Given:
There are three vertical wires. The wires to the left and in the middle have a current flowing vertically up and the wire to the right has a current vertically down.
Consider the figure shown. Let's assume that the magnitude of current in each wire is 
and each wire is situated at a distance 
from each other.
The magnetic field on the middle wire due to the wire in left is directed perpendicularly inward to the screen, as shown in the diagram. The magnetic field on the middle wire due to the wire in the right is directed perpendicularly outward to the screen, as shown in the diagram.
The force on the wire in the middle due to the left one is given by
where 
is the permeability of free space.
The direction of the force is towards the wire in the left, as shown in the figure.
The force on the wire in the middle due to the right one is given by
The direction of the force is towards the wire in the right, as shown in the figure.
As the magnitude of the forces are equal but the directions are opposite to each other, the net force on the middle wire will be zero.
Answer:
here the coil must be oriented in such a way that its plane is perpendicular to the magnetic field
Explanation:
As we know by Faraday's law of electromagnetic induction
Rate of change in magnetic flux will induce EMF in the coil
so here we will have
here we know that
now if the magnetic flux will change with time then it will induce EMF in the coil
so here induced EMF will be zero in the coil if the flux linked with the coil will remain constant
so here the coil must be oriented in such a way that its plane is perpendicular to the magnetic field
In such a way when coil will rotate then the flux linked with the coil will remains constant and there will be no induced EMF in it
