Heat rises so in my experience it is always overhead that has the most heat input.
20 min in a medium pressure 100 watt bed is approximately equivalent to about 2 hours in the natural sun at noon. The suns heat changes depending on what time of day it is. So 1 minute in the tanning bed would be about 6 minutes in the natural sun at noon.
If you have confirmed that your boyfriend has cheated on you, not once but twice, it may be time to take stock of your relationship. First, you need to ask yourself if his cheating is something you are going to be able to accept, forgive and move on from. This is going to encompass a lot of personal examination, and the answer will probably not come overnight. It may be easy to start with a simple list. Write down or think about what is most important to you in a relationship. Fun? Trust? Humor? Loyality? Dependability? The ability to cook? Then create a separate list of pros and cons for reasons you stay with your boyfriend. Does he match up to the list of what you expect and deserve in a relationship?If you evaluate the situation and make the decision to stay with your boyfriend, understand that this means forgiving and moving on from his mistake. It will take time for trust to be earned again. In the same breath, accepting an apology and agreeing to work past this problem means you have to do just that. Bringing this up in the heat of an argument six months from now is no longer fair game and will be deconstructive to repairing the relationship you once had.It may be easy to say you are going to take him back and move on, but before you do, consider what it may mean for you. Are you going to be able to let your boyfriend have an independent life in addition to your relationship? Or will you constantly be sitting at home worrying if he is cheating while you blow up his phone? Are you honestly going to be able to live with this creeping into your mind from time to time (and rest assured, it will)? Cheating is more than just a physical act. If you are the one who is cheated on, it is extremely emotional. It may be humiliating, it may be degrading, it may even make you wonder what you did wrong. You have to ask yourself if this man is truly worth feeling and working through these emotions. You have to question what kind of man would make you feel this way. You have to ask yourself if a relationship whose foundation of trust has already been broken can ever be repaired to the relationship you crave.The best advice is to never stay with someone for fear of being alone. This is going to be a difficult road whichever path you choose. Give yourself the time to grieve, to understand how you feel, and to decide if you are willing to give it another try. If the answer is no, then have faith in yourself. The fact that you found someone once means that you are a person who is worthy of being cared about and loved. You will find someone again, and it may be the person who values your relationship and you, enough to not put you through such pain.
How you calculate heat input and traveling speed for Gas Metal Arc Welding?
Heat input= voltage x current x 60 \ ipm
MY question is (WHAT IS DOWNHILL WELDING) The correct term is Down Hand Welding. Most welds in the vertical position are made from bottom to top. Down Hand means welding from the top to bottom. These welds are usually made on thin metal as the heat input is lower, thereby reducing penetration/burn thru.
Verticle down welding will always have lower penetration and less heat applied to the weld joint. As sheet metal is thinner and can not take excessive heat, verticle down reduces burn-through.
If you have no idea - don't write anything..
The heat input in the case of Submerged Arc Welding (SAW) is higher than that in manual welding process. Reason is that the welding proceeds continuously while the work is rotated. In manual welding, it is controlled by the welder besides the time gap for changeover of electrode, relaxation by operator etc.
What creates the heat is the flame inside the torch
in arc welding only heat is used to weld metal. but in resistance welding pressure will also be used along with heat.
The HAZ (heat affected zone) travels down and to the sides of the weld. The slower your travel speed and/or the higher the amperage setting means the more heat input which means the wider and deeper the HAZ will be.
TW = thermite welding, a welding process that requires no external source of heat or current.
A device that can generate heat. Melted material and the welding operation is performed.
It's called Fusion Welding. You answered your own question.