a busy waitress slides a plate of apple pie along a counter to a hungry customer sitting near the
end of the counter. the customer is not paying attention, and the plate sfides off the counter
horizontally at 0.84 m/s. the counter is 1.38 m high.
a. how long does it take the plate to fall to the floor?
b. how far from the base of the counter does the plate hit the floor?
c. what are the horizontal and vertical components of the plate's velocity just before it hits
the floor?

a. 0.5307 sec

b. 0.4458 m

c. =

Explanation:

Horizontal Motion

It describes the dynamics of an object thrown horizontally in free air. The initial horizontal velocity is maintained all the time since no horizontal forces are acting. The initial vertical velocity is zero at launch time, but it grows downwards powered by the acceleration of gravity.  

The object hits the ground at a distance x from the point of launching, after having traveled a vertical distance , taking a time t to complete the travel. The formulas who relate the different magnitudes are

The horizontal velocity is the same regardless of the elapsed  time

The plate of apple pie left the counter at a speed  

The counter is high.

a.

Knowing that

We use this formula to compute t

At the moment when the plate hits the floor y=0

Solving for t

b.

c.

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

3. dark matter

empty space could also be a simple vacuum