Why is the sun the original source of the renewable energy biomass? Because

sunlight is trapped in plants as they grow

Why does hot air or hot water rise? Because

it is less dense than cold air or water

Why is it better to use Mercury than alcohol in thermometers when high T are measured?

Because alcohol boils at lower temperature than mercury

What does the kinetic theory say?

When T decreases,molecules have less energy, speed decreases

A roof has an area of 100 m2 and an U-value of 3. T inside is 22 0C, T outside is 2 0C.

6000 Joules of energy is lost every second through the roof

Why do you guys need to study very hard? Because

chances of winning the lotery are really small, you want to evolve as a person and learn, school helps!, Mister Wieldraaijer says so, you are obligated to go to school

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Duplicate of 3V Physics Gas Laws, Molecules, Energy changes, transfer etc

8 termsStudBud Administration

3 VWO Broekhin Roermond

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Questions 8

Answers

1
Why is the sun the original source of the renewable energy biomass? Because
sunlight evaporates water and this drops down in rain again
sunlight is used in solar cells to convert to electricity
sunlight is used to burn plants in biomass factories
sunlight is trapped in plants as they grow
2
T₁ = 20 ⁰C, V₁ = 20 cm³, p₁ = 1 bar, T₂ = 20 ⁰C, V₂ = 5 cm³. What is p₂?
p2 = 4 bar
p2 = 0.25 bar
p2 = 0.5 bar
p2 = 2 bar
3
Why does hot air or hot water rise? Because
it is less dense than cold air or water
the volume is smaller than cold air or water
molecules have more energy in the same volume than cold air
it has more molecules in the same volume than cold air
4
Why is it better to use Mercury than alcohol in thermometers when high T are measured?
Because the expansion of mercury is 6x greater than alcohol
Because alcohol boils at lower temperature than mercury
Because alcohol expands too slow at high temperatures
Because mercury is also better for low T measurements
5
What does the kinetic theory say?
kinetic energy increases when the T decreases
When T decreases,molecules have less energy, speed decreases
When T decreases,molecules have more energy, speed increases
kinetic energy can be changed in electricity, heat or sound
6
A dull black surface is
Good absorber, poor radiator
Poor absorber, good radiator
Good absorber, good radiator
Poor absorber, poor radiator
7
A roof has an area of 100 m² and an U-value of 3. T inside is 22 ⁰C, T outside is 2 ⁰C.
12000 Joules of energy is lost every second through the roof
9000 Joules of energy is lost every second through the roof
6000 Joules of energy is lost every second through the roof
3000 Joules of energy is lost every second through the roof
8
Why do you guys need to study very hard? Because
chances of winning the lotery are really small
you want to evolve as a person and learn, school helps!
Mister Wieldraaijer says so
you are obligated to go to school

Duplicate of 3V Physics Gas Laws, Molecules, Energy changes, transfer etc Flashcards | StudBud