how much heat is lost when a 4110g metal bar whose specific hear is 0.2311J-gC cools from 100 degrees Celsius to 20 degrees Celsius?What is the specific heat of copper if a105g sample absorbs 15,200 J and the change in temperature is 377 degrees Celsius?THANKS
I had the front tire on my 01 Intruder vl1500 (671 lbs dry weight, me #250) go down 77 MPH. It was the scariest ride I hope I ever have. The bike pushed to the right at first and the rear slid left trying to jack knife, I fought the handle bars to turn left which brought the rear back around to the right. I did this several times back and forth until I came to a complete stop on the shoulder of highway. I gentleman stopped and asked my problem and asked if I had checked my valve stem. He had heard that the rubber ones have been known to shear off by centrifugal force. We looked and low and behold it was bent over cracked, causing the failure. God was with me that day.
a true front tire blow out, is gonna get you hurt bad. You immediatly lose all control of the bike. A tire going flat is difficult, but not impossible to handle, it just over steers back and forth as you correct but you need to get stopped quickly. A rear tire blowout is controllable, with experience but is not for the faint of heart. That's why good tires are so important on a motorcycle.
?H m*cp*?T m 4110 g; cp 0.2311 J/g-?C; ?T 100 - 20 - 80 ?C ?H 76 kJ cp ?H/(m*?T) m 105 g; ?H 15200 J; ?T 377 ?C cp 0.384 J/g-?C
A rear blowout at 70 can be controlled, you just have to stay straight, and use the front brake to stop, it ain't easy, but it can be done. A front blowout, at 70 it is likely you are going down, but I stopped a bike doing 40 with a front blowout. I used the rear brake to stop, and slowed down staying as straight as possible. Of course, evasive manuevers are not possible in that condition, so you gotta hope you decided on the safety gear that day! Honda 400 Super Sport, no damage, and patched the tube!
