When you walk down a flight of stairs, do you have more potential energy at the top of the stairs or at the bottom?\nExplain.
210942
You will of course have more Potential Energy at the top of the stairs. PE(grav) = H x M x g, where H is your height relative to the ground, M is your mass, and g is the acceleration of gravity (approximately 10 meters persec persec on Earth). Thus the higher you are, the greater the gravitational potential energy. So as you walk down the stairs, you decreasing your height relative to the ground, and thus lowering your PE. So what happened to the potential energy? Did it just disappear? No, the potential energy got converted into kinetic energy (you walking down the stairs) and also heat.\n\nJust as an additional note: the reason you have gravitional Potential Energy at the top of the stairs is because there is a gravitional force acting on you by the Earth. Of course when you are on the ground, there is still gravitional force acting on you. So when we talk about potential energy, we are talking about the potential energy difference between the top of the stairs and the ground, not some absolute number.
164271
As the wavelength goes up, the energy goes down. So blue is most energetic and red is least.\n\nHomework?
13742
Assuming it can't be II and III, I would say it's all of the above. The potential energy is converted into kinetic - the velocity increases and the height decreases. The KE + PE remains constant, because there is no work being done because there is no force here (besides gravity). However, the first depends on how you define mechanical energy - if it's kinetic energy, it's true. If not, I really don't know what it is.
164425
it depends on the angle of ur effort. lets say there u are trying to move a cart. if u push the way u will push ur mower, one component of ur force will be downwards, thus effectively pushing the cart down and thus increasing the frictional force . but if u pull the cart this force will not be downwards but upwards and hence the frictional force will be reduced. so its better to pull.
208034
HI MAWBY --\n\nI ANSWERED THIS YESTERDAY IN SOME DETAIL.\n\nPLEASE GO TO THE SITE AND QUESTION BELOW.\n\nITS IN THE AILERONS, TABS, AND ELEVATORS.
630583
If the landlord does not agree to give you time to inspect, then most likely there are some things that might not be working (such as the stove or laundry equipment). The bottom floor is better if you don't like climbing stairs or taking an elevator every time you come and go from the apartment. Careful and don't get taken!
106776
Maybe you're referring to pushing a swing higher & higher?  The swing is storing the energy of each push.  (The swing's energy is continually changing form, from kinetic to potential or vice versa.)  You're not really using the stored energy to make more energy, you're just putting in your own energy which adds to the stored energy.  As long as your push is in the direction the swing is moving, you are adding energy.  This kind of energy application, which is tuned to the swing's natural frequency, is called resonant forcing.  Conversely, if you push against the motion you are subtracting energy.
9980
When a basketball bounces there is a continuous conversion between Kinetic and Potential energies. \nAt maximum height of the bounce, Potential Energy (P.E.) is maximum and Kinetic Energy(K.E) is minimum or zero.At the floor level, K.E is maximum and P.E is minimum or zero. What is really relevant here is that the Total Energy of the system, E, which is the sum of K.E and P.E remains constant
67175
The energy does not become matter.  The partcles are the matter.  You, and everything around you, are mostly empty space.
536362
It's good to see people actually thinking about what the terms they're using mean, rather than just plugging them into equations.\n\nBasically, the place where you seem to be confused is here:\n\n"In gas such as water vapour, intermolecular forces of attraction is weak and hence it has low PE"\n\nActually, this means the exact opposite, that the system has very high potential energy. Think about gravity for a minute - if a rock placed at, say, 1 foot above the ground were to fall to Earth, it would not release very much energy. Conversely, if the rock were placed 1 mile above the Earth, it would release a considerable amount of energy. The higher the rock is, the greater it's potential energy. However, the further the rock is away from Earth, the weaker the force of gravity acting on it - thus weak gravitational attraction corresponds to higher potential energy. Similarly with the particles in a gas - if they were to "fall" into a partially bound state such as that of a liquid, they would release energy, and thus the unbound state where the particles are too far away from each other to form bonds is the higher energy state.\n\nThis is not to say that a weaker force always corresponds to a higher energy state - if the reason that the force is weaker is that there is less mass/charge/whatever producing it, that really will lower the potential energy. But in the transition from a liquid to a gas does not change the charge of any of the particles - the reduction in intermolecular forces comes from the fact that the particles are moving out of each other's electrical potential wells, a process which, just like lifting up a rock, raises the potential energy.
383975
Potential energy is stored energy. Once you'll know the potential energy of things, you can make use of this in many applications. It just like knowing your potential to burp many times, you'll show this off to your friends to be cool. Or knowing the potential of your dog to bark and bully someone, you'll bring your dog to your enemies to scare them away!\n\nOn a more serious side, knowing the potential energy of your food (through calories content) will let you know how much energy can you get if you are going to eat them. So, when you are going to have lots of physical activities, you are going to eat these energy giving foods to keep you going.
391797
conservation of energy
557408
I was always told to stand in a doorway.  I grew up in Alaska and experienced many quakes.  I never lived in an apartment complex.  I would definately stay off the stair and/or elevator once the earthquake began.  Do you have an earthquake survival kit?  It might be good idea to put one together if you don't.
55855
If your doctor recommends that you exercise and get some cardio exercise than climbing stairs is a good exercise.  Just be aware of your body.  If you start to get really tired, or feel dehydrated, get off the next floor and take the elevator.  Getting your heart pumping should be good for you.. your body needs it, but I would talk to your doctor about it if you're concerned.
174197
if you go from A to be and then B to A you should have no overall energy change. one will be an exothermic reacion and the other should be endothermic reaction
11996
reverie's wrong.  Most mass actually comes from kinetic energy, not rest mass.  you can correcly give energy (including heat energy) the same units as mass so it makes sense to say "one pound of heat"... but force is something different entirely.
281245
A. height and weight. Potential energy is the energy contained in an object due to its position in a force field (such as a gravitational field), and has nothing to do with speed (which would be kinetic energy). Thus you can eliminate options C and D. Further, energy is defined as the ability to do work, and work is simply force*distance. Since the weight of an object would be applied over a greater distance if the object fell from higher up than if it fell from a lower distance, height does influence potential energy, which means the only remaining option is A.\n\nBTW, about B - it might seem that potential energy also depends on mass since that will affect the weight of the object, but if you changed the mass of an object without changing its weight (by varying the gravity in inverse proportion to the mass), the potential energy would not change. Conversely, there's no way to change either the object's height or weight while holding the other constant without changing its potential energy, which is why A is right and B is wrong.