Which factor causes atmospheric pressure? a. sizes and shapes of clouds b. air currents in the atmosphere over the ocean c. altitude above sea level d. weight of the atmosphere above a surface

D. Weight of the atmosphere above a surface

Explanation:

As we know that pressure is defined as the ratio of Force and area.

it is given as

Now we know that atmospheric pressure at any point where we need to find is due to some force above that point. Here this force is due to weight of the air or gases above that point where we need to find the atmospheric pressure

we can write it as

so it directly depends on the weight of atmosphere above the surface

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia