If the snowball takes 0.65 seconds to reach the smokestack, what is its velocity?
15 m
Smokestack
Knoll
* 4.5 m
Level ground
9.8 m/s
17 m/s
23 m/s
O 6.9 m/s

Question

What is the horizontal component of velocity at the instant the ball is thrown?

23 m/s

Explanation:

Velocity is given by diatance per unit time. In this case, the horizontal distance is 15 m and time is given as 0.65 s hence substituting the above figures for velocity, we obtain that v=23/0.65=23.076923076923 m/s

Rounded off, the horizontal velocity component is approximately 23 m/s

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