Apomegranate is thrown from ground level straight up into the air at time t=0 with velocity 240 feet per second. its height in feet at t seconds is f(t)=-16 t^2+240 t. find the time it hits the ground and the time it reaches its highest point. hits the ground when t= 4 second (include units) reaches highest point when t= 2 second (include units) maximum height =

a)

b)

c)

Explanation:

From the exercise we have the equation of height and the initial velocity of the pomegranate

a)To find the time that it hits the ground we know that its position is 0

Solving for t using quadratic equation

or

Since time can not be 0, the answer is t=15s

b) To find the time that it reaches its highest point we need to analyze the velocity at that time

At the highest point its velocity is 0

c) To find the maximum height we need to use f(t) with t=7.5

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