JamSmith

Thanks for detailed information and clarification.

I was wondering about this solution. Well, thank you Sriman Datt. Oh ok, I am grateful to you for your more precise discussion.

I got your point, I can also follow this right? Moment (Nm) = Linear force applied at a point (N) X Perpendicular distance between applied point and pivot point (m) We can then specify the rotational equivalent of Newton's laws: 1. If the moments on a rotating object are balanced then the object remains stationary or at constant angular velocity. 2. If the moments on a rotating object are unbalanced then the object will have an angular acceleration. 3. Moments are balanced by equal and opposite moments The rotational equivalent of Newton's first law is often called "The principle of moments", which is "if the sum of the clockwise moments is equal to the sum of the anticlockwise moments, the object does not rotate or rotates at constant angular speed".

But if the beam isn't rotating (balanced), so I have to consider the clockwise moments equal the anti-clockwise moments?

I was solving some online physics question papers. Can anyone explain, what is Turning Effect of Force? & also guide me how to solve this: A uniform beam of 1 m is supported at the 50 cm mark. Given that a weight of 2 N hangs at the 30 cm mark, how far away from the pivot must another weight of 4 N be hung to balance the beam?

Thanks. I have found much more clues to solve my doubts.

The formula for kinetic energy is E=[1/2]mv^2 and the formula for momentum is P=mv. I ran into these in physics class long ago and was really bothered by the first formula. How can energy go up as the square of the velocity?

Thank you, both for the guidance.

Maybe the potato chip bag was sealed at the surface pressure. And the pressure at the top of the mountain is less than surface pressure. So the packet's pressure is higher than the outside pressure and that is the reason why bag inflates like a balloon. I think I am doing right! I am not sure about what you asked If the air outside hotter, I am just assuming that, " If the air outside hotter then maybe the bag will slowly inflate like a balloon..!! Because the air has a certain amount of heat, which it carries with it as it rises". or The air inside expands until the pressure inside is the same as that outside. Some weather balloons explode at height.

I am not tech savvy. But I like to solve quiz relates math and physics. I was solving such questions and come across this question. "On a cloudy day, a sealed packet of potato chips is taken to the top of a mountain. The packet is found to be blown up like a balloon." What is the reason behind it? I found two reasons as per my knowledge, 1. The air outside the packet is hotter than the air inside the packet or 2. The air outside is now at a lower pressure than the air inside the packet. Which one is the right reason? Please guide me in detail.

The dew point is the temperature at which air is saturated with water vapor, which is the gaseous state of water. I have also read that Dew point is closely linked to relative humidity, which is the ratio of the pressure of water vapor in a parcel of air relative to the saturation pressure of water vapor in that same parcel of air at a specific temperature. Is this satisfying description? Yes, I have noticed that, and also research on it last night. I sum up with this: The fog in the mirror is the moisture of water vapor as it abuts a colder surface. With the cold water, we just cool down the bathroom. So the vapor came from the hot shower, mostly condense and will not reach the mirror. At the same time, if we do something opposite like vapor comes from heat or hot air will become less likely on the warmer surface. For air containing a certain amount of moisture, there is a maximum temperature at which the water will Epitomize. This is called the dew point. Right?

I was recently reading a topic about: What if gravity acted like magnetism? While I was studying about it, I come across the information which makes me little blunt about basic information. My questions arise when I read "If you have a positive charge the first thing it does is repeal all the other positive charges around it and attract all the negative charges." I this happens because of magnetism and the electric force? Is that true that they tend to cancel themselves out? And if its true than what is the reason behind it?

I am not sure about it, may be 20° C or below I have only tried it on glass. If Discussiong about Window panes then I observed that when Cooling outside the window fog up inside. The higher the dew point, the longer it will take for the glasses to clear.

Hi everyone, I was solving some real time physics question and come across this question. I have tried to find out the perfect answer but couldn't satisfied with my analysis. Can anyone guide me? On a cold, dry winter day your glasses fog up when you go indoors after being outside for a while. Why is that? And if you go back outside with your glasses still fogged up, they quickly clear up. Why is that?

Thanks for the new insight. So can follow this information right? The force of gravity is proportional to the size of the object (mass) and your position relative to it (distance from the center of gravity). Here is the formula: g=-GM/(r*r), where, g is the acceleration of gravity, G is the gravitational constant, M is the mass of the object and r is the radius or the distance of the observer from the center of gravity.

I have read somewhre regarding this topic and I come across this information. Gravity is a weak force. The two objects will have an attraction to each other. But it will be so weak in comparison to other factors and to the attraction to the ground that the attraction to each other will not be noticeable. There is a concerted effort to obscure our understanding of gravity. So we do not see much research on the attraction between small objects.

I got your point. Thanks for co-operation.

Thanks for the concept. But if we think of entropy as "disorder", I come across so many articles. I Found this one short and very clear. http://webs.morningside.edu/slaven/Physics/entropy/entropy7.html Is it relavent blog to follow?

Thank you Bender. So finally this follows the rule : A natural process (reaction) causes an increase of entropy or entropy increase is the driving force for natural reactions. If there is an err please correct me.

I had discussion on statistical mechanics with my friend last night. I come to know, The relationship between entropy and disorder is studied in a discipline called statistical mechanics. I have no cleare Idea about , How is Entropy Related to Disorder? Can anyone help me to clear my mind.?