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- 7.04
- A)How does it come that on a woodenfloor [InsertGirlnamehere] high heels hurts the floor more than a 100 times bigger elephant?
- B)An airplane is shaped so the preasure gets bigger on the bottom side rather than the top when it flys thru air, why is it shaped like this?
- 7.06
- Filip and Fredrik lives in the same house, the pressure on the waterpipes for Filip is 400kPa - How big is it for Fredrik that lives 12.5m higher upp?
- 7.07
- Ellen hangs a brass weight on a dynanomometer and it shows 4,0N The weight got the volume 49Cm3. She lowers the weight into vatter with the density of 1,00x10^3/m3, how big is the liftforce of the weight? What does that dynanometer show now?
- 7.09
- On Gunnars Summerplace he did build a float made of wood that is 6 m tall och 1.5 m wide och 0.40m high and it does weight 2,0 tons,
- for his birthday Oskar invited all his friends in the good and is having a bathparty, the float is a bit from the beach.
- A) How deep down is the float?
- B) How many of Oskars guests can the float hold up with they have a AVG weight of 75kg?
- 7.17
- A container contains gas with the pressure 5,0 MPa and the temp 17'c. The container can maximum take 15 MPa, what is the highest Temp it can take?
- 7.20
- What way does the heat seek?
- A) When you put your hand down in water with the temp 42'c?
- B) When you have frozenwaterblock in your ahnd?
- C) When at milk of glass has the temp of 10'c and the room is 20'c?
- D) When the air on both sides of a window has 18'c?
- 7.28
- Info shows that it takes 5.5kJ to raise the temp of a bottle to raise it from 20'c to 90'c, find the heatcapacity and why is it so good that it has a low heatcapacity?
- 7.30
- How much enegeri do you need to;
- A) Melt 150g 0'c ice?
- B) Heat 150g 0'c ice to 100'c?
- C) evaporate 150g 100'c water?
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