In a first-class lever, where is the fulcrum?
Anonymous Quiz
32%
Between force and load
35%
At the far end from the load
20%
At the far end from the force
13%
At the midpoint of the force arm
Which gas is the main driver of anthropogenic greenhouse effect?
Anonymous Quiz
9%
Oxygen
25%
Nitrogen
63%
Carbon dioxide
2%
Argon
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What if you got sucked into a black hole?
What is the frequency range audible to humans?
Anonymous Quiz
17%
1–100 Hz
47%
20–20 000 Hz
27%
100–1000 Hz
9%
20 000–200 000 Hz
Who proposed the double-helix model of DNA?
Anonymous Quiz
9%
Pauling and Corey
67%
Watson and Crick
20%
Franklin and Wilkins
4%
Avery and MacLeod
Which law states that the energy of an isolated system remains constant?
Anonymous Quiz
36%
First law of thermodynamics
46%
Second law of thermodynamics
12%
Coulomb's law
6%
Faraday's law
What is reproduction without fertilisation called?
Anonymous Quiz
13%
Sexual reproduction
62%
Asexual reproduction
17%
In vitro fertilisation
8%
Induced parthenogenesis
What is a black hole?
Anonymous Quiz
5%
A cold neutron star
72%
A region where escape velocity exceeds the speed of light
18%
An empty area between galaxies
4%
A planet with no atmosphere
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What is the duplication of DNA before cell division called?
Anonymous Quiz
21%
Transcription
16%
Translation
57%
Replication
7%
Recombination
What gas makes up about 21% of Earth's atmosphere?
Anonymous Quiz
28%
Nitrogen
61%
Oxygen
5%
Argon
6%
Carbon dioxide
What is the function of white blood cells?
Anonymous Quiz
10%
Carry oxygen
78%
Defend the body against pathogens
9%
Clot the blood
3%
Produce hormones
What is the average Earth-Sun distance?
Anonymous Quiz
37%
150 million km
34%
380 000 km
17%
1 billion km
12%
57.9 million km
What does the Doppler effect describe?
Anonymous Quiz
68%
Frequency change due to relative velocity between source and observer
18%
Light refraction through a prism
8%
Sound diffraction around an obstacle
5%
Interference between coherent waves
What is an enzyme?
Anonymous Quiz
10%
A steroid hormone
81%
A protein that catalyses biochemical reactions
8%
A membrane lipid
1%
An energy nucleotide
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