Calculate the difference in blood pressur toes of a human by treating the blood as a static fluid (this is a very crude approximation because there is a pump which is making the blcod flow). assume that the person is 187 cm tall and that the density of bloc d is 1060 kg/m3 use g=10 m/s2). for comparison, normal blood pressure is about 880 mm hg = 117 kpa, this comprises 760 mm hg of atmospheric pressure and 120 mm hg of relative pressure
the difference in blood pressure is kpa
to be honest as much as i would love to answer this. i feel as if something's missing. just saying.
i) you walk barefoot on the hot street and it burns your toes.
the road is in direct contact with your skin. thermal energy from the road will transfer to the bottom of your feet, then to the rest of your body. this is an example of conduction.
ii) when you get into a car with hot black leather in the middle of the summer and your skin starts to get burned.
just like in the previous example, the hot leather is in direct contact with your skin (i guess if you're going to drive naked). thermal energy from the leather will transfe to your skin, then to the rest of your body. this is also conduction.
iii) a flame heats the air inside a hot air balloon and the balloon rises.
the flame heats air directly at the bottom of the balloon. the warm air expands and becomes less dense. this will rise and let the unheated, denser air in the balloon fall down toward the flame. this is an example of the convection cycle.
iv) a boy sits to the side of a campfire. he is 10 feet away, but still feels warm.
the campfire heats air directly nearby. the warm air expands and moves away from the fire in all directions, leaving behind unheated, denser air to be heated up. some of the warm air reaches the boy. this is another example of convection.
the answer is a) 1 and 2.
how many feet of wire does it take to make one slinky? each one is made from 80 feet of wire and over a quarter billion slinkys have been sold worldwide.