What is the relationship between sunspots and geomagnetic storms?

1 answer:

8 0

Sunspots are spot like structure on the surface of sun, they are created due to geomagnetic flux which inhibits the convection of heat waves thus reducing the temperature of spot with some factor

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Samantha wants to determine the force she feels in her car as she's going around a corner. What would be some of the assumptions

dalvyx [7]

To determine the Force it is necessary that Samantha starts from the consideration of the dynamic balance between the forces acting on the car. For this, the centripetal force must be equal to the friction force (otherwise the car would lose contact with the ground), the expression of these two forces would be

$F_f = F_c$

$\mu_k mg = \frac{mv^2}{r}$

Here,

$\mu_k$ = Coefficient of kinematic friction

m = mass

g = Acceleration due to gravity

v = Velocity

r = Radius

From this relationship then she should assume the following

1) The car travels at a constant speed

2) There is indeed that frictional force between the car and the road

3) There is no loss of mass during displacement

4) The centripetal force must be equal to the frictional force so that the car does not lose contact or slip

5) The radius must be constant

7 0

3 years ago

Charge q is 1 unit of distance away from the source charge S. Charge p is two times further away. The force exerted between S an

insens350 [35]

Answer : The correct option is, (d) 4 times

Solution :

According to the Coulomb's law, the electrostatic force of attraction or repulsion between two charges is directly proportional to the product of the charges and is inversely proportional to the square of the distance between the the charges.

Formula used :

$F=k_e\frac{q_1q_2}{r^2}$

where,

F = electrostatic force of attraction or repulsion

$k_e$ = Coulomb's constant

$q_1$ and $q_2$ are the charges

r = distance between two charges

First we have to calculate the force exerted between S and q when the distance between the charge is 1 unit and let us assumed that the charge be 'q'

$F_{sq}=k_e\frac{qq}{1^2}=k_e\times q^2$ ..........(1)