Arock is projected upward from the surface of the moon, at time t = 0.0 s, w a velocity of 30 m/s. the acceleration due to gravity at the surface of the moon in 1.62 m/s2. what is the maximum height of the rock above the surface?

Explanation:

The situation described here is parabolic movement. However, as we are told that the rock was projected upward from the surface, we will only use the equations related to the Y axis.

In this sense, the movement equations in the Y axis are:

   (1)

   (2)

Where:

 is the rock's final position

 is the rock's initial position

is the rock's initial velocity

is the final velocity

is the time the parabolic movement lasts

 is the acceleration due to gravity at the surface of the moon

As we know , equation (2) is rewritten as:

   (3)

On the other hand, the maximum height  is accomplished when :

   (4)

   (5)

Finding :

   (6)

Substituting (6) in (3):

   (7)

   (8)  Now we can calculate the maximum height of the rock

  (9)

Finally:

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explanation:

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