Recent content by marvolo1300

Sorry, I'm not sure what you mean. These measurements are the same length recorded 3 times.

Let's I have three values, 3.30±0.1, 3.32±0.1, and 3.31±0.1. How would I find the uncertainty of the average of these values?

Well, it was worth a shot.

What a coincidence! It seems you may have a unit for the rate of evaporation.

Here's what I found so far: LINK. CLICK ME! Basically they define the rate of evaporation as: massWater/(unitArea/unitTime) Sorry about the lack of a direct link, I am using an OS without a supported PDF plugin.

Hi, it has been a while since I've been on PF. I know that the rate of evaporation depends on the relative humidity, temperature, pressure and surface area. Is there any formula that fits this criteria?

I solved it. Basically, you need to draw a free body diagram. Where the vertical component of the force is F*sin(theta) and the horizontal is F*cos(theta)

How would I find the net force given the angle of the applied force, the mass, and the magnitude of the force? Homework Equations F=ma I need to fit an angle in that equation somehow.

Thank you PhantomJay. The centripetal force in this problem is provided by the tension of the string and also the force of gravity. So, Fnet = m*g + (m*v^2)/r

Thanks anyways. I solved it. For anyone that is looking for an answer: Yes, you must add the centripetal force to the force of gravity. This is because the centripetal force in this example is found through the velocity, rather than through the acceleration due to gravity.

Homework Statement An object is being swung vertically on a stick. What is the net force at the bottom? The mass of the object = 2kg. g= 9.81ms-1. v = 6ms-1 at the bottom. Homework Equations F= mg Fcentripetal = (m*v^2)/r The Attempt at a Solution I just need to know if i...

How would I go about creating a line of worst fit in excel? Would I create a different row for the uncertainties?

How fast must a plan fly in a loop-de-loop if the pilot experiences no force from either the seat or the safety belt when he is at the top of the loop? I just need to be pointed in the right direction. Thanks in advance for your help.

1. Homework Statement : A ball is thrown vertically upward with a speed of 20.0m/s. i) How fast is it moving when it reaches 16m ii) How long is required to reach this height? iii) Explain why there are two answers. 2. The attempt at a solution I assume there are two vectors. The force of the...