Answer:
a
The magnitude of the force is 
The direction is from south to north i.e upward
b
The magnitude of the force is 
The direction is towards the west
c
The magnitude of the force is 
the direction of the magnetic field is parallel to the direction of the current (south to north ) hence the direction in 0 in comparison to the direction of the current
d
From the value of force we got the answer to this question is No
Explanation:
Generally magnetic force is mathematically represented as

Where the B is the magnitude of the magnetic field which is given as

is the current with a value of 
L is the length of the wire given as 
Substituting the value


For the first case where the current is moving from west to east and we are told that the magnetic field is from south to north the according to Fleming's right hand rule the force(exerted by earths magnetic field ) would be moving from south to north (i.e upward)
For the second case where current is moving vertically upwards the direction of the force is to the west according to Fleming's right hand rule
Water may come into contact with very hot rock heated by magma
Answer:
Increase in surface area leads to more chances for connections between neurons hence more possible learning
Explanation:
The brain appears wrinkled due to the presence of gyri and sulci. Sulci are the grooves in the brain while gyri are the folds. The two major functions of gyri and sulci are to lead to formation of brain divisions and increase the surface area of cerebral cortex. The formation of brain divisions is done by creating boundaries between the brain lobes thereby leading to division of the brain into two hemispheres. Moreover, by increasing the surface area of the brain, the cortex processes more information since more neurons are formed.
Answer: D.) 3hrs
Explanation:
Given the following :
A boat can move at a constant velocity of 8 km/h; How long will it take for the boat to move 24 km
Recall:
Velocity = Displacement / time
For the boat to travel a distance of 24 km at a constant velocity of 8km /hr
Time taken = Displacement(distance moved) / velocity
Time taken = 24km / 8kmhr^-1
Tine taken = 3hrs