Answer:
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.





Explanation:
Snell's law (also known as Snell–Descartes law and the law of refraction) is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air.
The weight of anything is (mass) x (gravity in the place where the thing is).
Gravity on Earth is about 9.8 newtons per kilogram, so on Earth,
the weight of the book is
(2.06 kg) x (9.8 N/kg) = <em>20.19 newtons</em> .
Another way to get around it is:
On Earth, 1 kg of mass weighs about 2.205 pounds, so on earth,
the weight of the book is
(2.06 kg) x (2.205 pounds/kg) = <em>4.54 pounds </em>.
A they all move the same speed in a vacuum this is because in a the photons don't bump in to anything