Recent content by Dberry

I know I have to find time first, but if you read the comments I'm asking about the equation used. I have never seen it before and I'm confused about where it comes from. Is it derived from another equation?

Homework Statement The diagram to this problem is of a HILL as shown: Point A - - 20m - - ------------------------50m------------------------- Point B...

by build I meant FLUID

I have the definition and examples of convection in my book. I guess the air is the build medium but how is the fan blowing on the tanning person convection? Where is the warm air and where is the air moving?

I still don't understand. Can someone dumb this down for me?

In my book I'm reading about heat, specifically convection. There is an image of a person with a drink in their hand, suntanning while a fan blows on them. I get that the drink represents conduction, the sunlight is radiation, but how is the fan convection?

Thanks so much for your help! :)

I know the answer is A (my book told me). I'm just trying to understand the concept. :) So if the magnetic field in this question is decreasing, then to help maintain it the current in the loop would create a magnetic field in the same direction to increase it? So if I used right hand rule my...

That's what I think too! It must be an error in the question because the drop is not shown to have any positive or negative orientation. I just wanted to know if it was a book error or if there was something I didn't understand. Thanks everyone for all your help! :)

I am very confused by Lenz's law... is there any way you can dumb this down for me?

The book shows the drop falling directly in between the plates and doesn't show it being pushed in any direction. If the drop were negative I assume it would move to the right towards the positive plate (since opposites attract). What I don't understand is how am I to know the charge on...

Homework Statement A stationary loop of wire is placed in a magnetic field directed into the page as shown below. (the image shows a magnetic field like this and a circle in the middle to represent the loop) X X X X X X X X X X X X X X...

Homework Statement A charged oil drop is allowed to fall through the electric field created by the plates as shown: + - l l l l l l In order to give the oil drop a straight trajectory, a magnetic field should be established with...

The forces acting on the object are air resistance and the force propelling it. The net force must be zero because constant velocity means there is no acceleration, so according to F=ma F is zero. The net force acting on the object right now are the two forces mentioned above and nothing...

Homework Statement If F is the force of air resistance on an object with mass m moving at a constant velocity, which of the following best describes the acceleration of the object when the force of air resistance is reduced by a factor of 4? Homework Equations F=ma The Attempt at a...