Test 1 completed Flashcards
(planned combo of 1,2,3,4,11 + random
Environmental consequences of burning coal
-Non-renewable
-release of CO2 contributes to global warming
- damage to environment by mining
Renewable
wind, solar, biofuel
Non-renewable
fossil fuels and nuclear fuels
Explain how a gas exerts pressure on the walls of its container
Pressure is caused by molecules hitting the walls, changing the momentum and so causing a force. The pressure is the force per unit area on the walls of the container.
How the final pressure compares with p2 when the temperature of the
gas increases during compression.
Increases. Gains more kinetic energy. More collisions. Greater rate of change in momentum.
IIU,DMM,RRV
Last one is the smallest
The dense people refraction rule
Dense people have small brains, referring to the space between the normal and refracted ray
Which colour is most refracted
Violet
Light passes through a triangular prism, which is least bent?
red
What does MHz stand for?
million hertz
Angle relative to..
anti-clockwise or clockwise: moves away from the object that it is relative to
Formula for resultant force.
F= change in p/change in t
Explain why the radio transmitter without the wires is a very unstable structure.
a small rotation produces a moment which topples the radio transmitter
Describe the method of generating electric power using hydroelectric power.
Water is kept behind the dam and is released. As the water falls, gpe is transferred to ke. Water turns turbines, which then turns generators.
Advantages and disadvantages of hydroelectric power.
safe, clean and reliable way. Short start-up time, so quickly generated when there is demand
people made homeless, wildlife habitats destroyed
