Adiver springs upward with an initial speed of 1.75 m/s from a 3.0-m board. (a) find the velocity with which he strikes the water. [hint: when the diver reaches the water, his displacement is y = -3.0 m (measured from the board), assuming that the downward direction is chosen as the negative direction.] (b) what is the highest point he reaches above the water?

a) 7.848 m/s

b) 3.156 m

Explanation:

t = Time taken

u = Initial velocity = 1.75 m/s

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

His highest height above the board is 0.156 m

b) Total height he would fall is 3+0.156 = 3.156 m

He is in the air for 0.8+0.18 = 0.98 seconds

a) His velocity when he hits the water is 7.848 m/s

the answer is a. hope this .

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