Since science does not prove anything, neither the theories of evolution nor creationism are proven. Discoveries often presented as evidence are in fact just observations that did not disprove the theories or the hypotheses formulated based on the theories. How do I decide between these two theories...

Two small bulbs are held one above the other. The top bulb is red; the bottom bulb, green. A small ball is held between the bulbs and a white screen.
** Please see the attached file **
You don't need to sketch it like it says in the problem, just explain.

Please see the attached.
If the attached drawing represented a very crude design of a theoretical and artifical leg ---- and if I know the force applied is 100 kg, how would I go about calculating the pressure applied to the knee joint and foot that I show.
I have not provided a dimension for ...

(a) Construct quantities having the dimensions of energy and of length when the potential energy is V(z) = mgz for z > 0 and V(z) = 1 for z < 0.
(b) An electron bounces on a horizontal surface. In its lowest energy states, the electron stays near the surface, held there by gravity. Show that the ...

I have attached my lab and data sheets. I need questions at the end of the lab (1, 2, 5, 6) answered and the free body diagram drawn with all symbols and which way the acceleration points. Please give any explanations.
See attached file for full problem description.

Please provide assistance with the following questions:
Which of the following has three significant figures?
a. 1.00081 kg
b. 8.060 x 1011 m
c. 0.0500 mm
d. 305.0 cm
(I think the correct answer is d)
Express 0.0015671 to three significant figures.
a. 0.002
b. 0.0016
c. 0.00156
d. ...

Excel Spreadsheet Problem
A mass M is connected to the end of a spring with mass m and force constant k. The mass of the spring is 7.40 g. When the mass/spring system is set into simple harmonic motion, the period of its motion is
T = 2*PI*SQRT((M + (m/3))/K)
Part 1: A two-part experimen...

In an atwood machine experiment, the larger mass is 1.8kg and the smaller mass is 1.2kg. Ignoring friction, the acceleration of masses when released from rest is?

In a projectile motion experiment, if you wanted to plot the range R versus a quantity that depends on angle (that is, you are going to vary the angle) and that would result in a straight line, what would you choose for the independent function variable (function variable plotted along the horizonta...

Place a coin at one edge of a textbook and slowly lift the book. When the coin just starts to slip down the incline, measure the angle (theta). Find Ff = m*g*sin(theta) and N = m*g*cos(theta).
Do I need to know the mass of the coin(m), gravity(g), and the angle(theta) the flate surface makes wit...

21. When green glass is placed between the flashlight and the white movie screen (see attached diagram), a green spot appears on the screen. If green glass and red glass are placed between the flashlight and the movie screen (as shown on the right below), what will happen to the spot?
(a) It w...

I take principles of Physics and for the last two days I have been trying to do a lab where I have to develop a design with 6 yards of strings conected to two poles and pulled taught, as many balloons as necessary, straws, tape, and paper clips. The set up of the lab is a string stretched taught acr...