Physics Particle Model And Matter

Question 1

The power output of the turbine is directly proportional to the kinetic energy of the air
passing the blades each second.
Describe the effect on the power output when the wind speed is halved.

Answer 1

b) mass of air passing the turbine blades is halved which decreases kinetic energy by a
factor of two
(wind speed is halved) decreasing kinetic energy by a factor of four
so kinetic energy decreases by a factor of eight

Question 2

When temperature increases particles gain…

Answer 2

Thermal energy

Question 3

Does a meter ruler have a higher or lower resolution than a micrometer

Answer 3

A much LOWER resolution

Question 4

Explain what type of error would be caused if the student’s eye was not in line with the level of the liquid in the tube

Answer 4

random error
allow a parallax error human error is insufficient
(because) eye position would not be the same each time (relative to the liquid)

Question 5

The internal energy of the air increases as the tyre is inflated.
Explain why. ___________

Answer 5

work is done on the air (in the tyre)
so the temperature (of the air) increases
allow the (average) kinetic energy of the particles increases