Biology
Earth and Astronomy
Physics
Chemistry
Challenge questions （300 extra)
100
Name the organelle labelled "G":
Mitochondrion (singular)/ Mitochondria (plural)
100
What is the percentage of the Earth's surface covered with water?
71% (or 70%)
100
(Hypothetically) Mr. T gently and gracefully applies a horizontal force of 1100N for 0.314159s on Johnsun, who is sitting on a frictionless surface. How long will it take for Johnsun to come to a stop if no other forces intervene and there is no air resistance?
Forever. Hypothetically literally.
He will slide elegantly away for eternity.
100
What type of diagram is this?
Lewis Diagram
100
Meet Dumbledore (scribble scribble) Gandalf, a fictional character in The Lord of the Rings (book/movie). In this scene of the movie, Gandalf fought against the monster Balrog of Moria, and sent it tumbling down the dark pit beneath the mines saying his famous line, "YOU SHALL NOT PASS!" (No offense to anyone, I hope you all pass your exams:).Unfortunately, the Balrog swung his whip during the fall and grip hold of Gandalf, therefore bring him down as well. Assume there is no air resistance and the whip of the Balrog was just long enough to reach to Gandalf's ankle (Lwhip=88.0m), and Gandalf decides suddenly to count "Mississippi" as soon as the Balrog starts falling, how many "Mississippi" can he say before being dragged into the eternal pit of darkness with the Balrog? (round to the closest syllable, gmiddle earth=gearth) 
Mississippi mississippi mississippi mississippi mi
Lwhip=88.0m = distance Balrog fell (d)
d=1/2gt2
t=sqrt(2*d/g)
t=sqrt(2*88/9.8)
t=4.2378...s
about 4 and 1/4
200
What are the four nitrogenous bases of DNA and how do they pair up (Letters are fine)?
A-T, G-C
adenine (A), thymine (T), guanine (G), cytosine (C)
200
Name the 1 star and 8 planets of the solar system.
Star: Sun
Planets: Venus, Mercury, Earth, Mars, Jupiter, Saturn, Uranus, Neptune (No Pluto! It's no longer 2006).
200
Eeva needs to slide a slice of pizza across a 3-meter-long table (don't ask why). The table is an ideal smooth surface, and there is a perfect pink sphere with a diameter of 0.5 meters placed right in the middle of the table. Eeva avoids the sphere by lifting up the slice of pizza, moving it over the perfect pink sphere, then putting it back on the table to continue sliding it to the end. What is the total work done on the pizza by Eeva?
0 J
200
What is the name of the Element "U"?
Uranium
200
Name all layers of earth (inner and atmosphere)
Troposphere
Stratosphere
Mesosphere
Thermosphere
Exosphere
Curst
Mantle
Outer core
Inner core
300
What is the full name of DNA?
Deoxyribonucleic acid
300
The latitudes (North and South) that marks the tropics
23.5°N and 23.5°S
300
Mack Dalnold is cruising in a swimming pool full of water on a little wooden boat full of rocks (don’t ask why). Mack suddenly decides to throw the rocks from the boat in to the pool. How will the water level of the pool change? (Increase, decrease or stay the same)
The water level will decrease.
Mass of water must equal to mass of rocks;
Density of water<density of rocks;
Therefore volume of water>volume of rocks, the water level rises.
300
Name the acid: CH3COOH
Acetic acid
300
Solve:
tan(兀/2cos(x+1)))=5
x=0.506734316082-1+2\pi n
x=2\pi-0.506734316082-1+2\pi n
400
What is the largest organ of the human body?
The skin
400
Identify the constellation shown in the picture:
Orion
400
Image a circuit with magnetic field pointing outwards. Which direction will the magnetic force on the top section of the wire be?
Wire---------------------------Wire-------
| |
---Positive Terminal-Negative Terminal--
Up/North
400
Zn+Cu2+→Zn2++Cu
Which if the following statements about the reaction is false?
A. The equilibrium constant is greater than one
B. The reaction is spontaneous
C. The cell potential is positive
D. Gibb's free energy is positive
D. Gibb's free energy is positive
400
Let g be the function defined by g(x) == ex^3.. Using the Maclaurin series for ex, what is g(21)(0), the twenty-first derivative of g at x = 0?
21!/7!
500
How is the bird's respiratory system unique?
Birds have a special breathing mechanism called double respiration, because of this the birds can absorb oxygen more efficiently. This process allows air to pass through the lungs twice.
500
Tropospheric ozone (ground-level ozone) forms mainly from_________.
Nitrogen dioxide and UV light
500
Romeo sets off in his spaceship to marry Juliet, who lives on the planet Lovelon, 10 light-years away from earth. He can accelerate at 15 m/s2, and must decelerate at the same rate, in order to stop at Lovelon. Unknown to him, Juliet has taken an earlier shuttle back to Earth and she will wait there. Since there is no communication, Romeo will have to travel back again! Romeo left yesterday, on June 17th, 2025. What is the earliest year in which they can be wed? Romeo and Juliet are both classical persons, and they ignore any relativistic effects! (1 light-year is about 9.46 x 10^15 m)
A)2027 (B) 2032 (C) 2035 (D) 2065 (E) They will die from old age first
If Romeo travels all the way there at 15 m/s^2, then 10 light-years will take him a time given by 10 x 9.46 x 10^15 = 1/2 x 15 (time)^2 giving 1.123 x 10^8 seconds, or 3.56 years, and he will be moving at 16.85 x 10^8 m/s, which in Startrek language is Warp 5.6! This won't do him much good of course, because he will pass Lovelon at this speed. Romeo has to travel half-way to Lovelon, 5 light-years, then reverse his rockets to decelerate for another 5 light years at 15 m/s^2, so that he arrives at low speed for docking. This splits the journey exactly in half, due to the obvious symmetry of the motion. At the half-way point he'll be moving at 11.9 x 108 m/s, which is near enough Warp 4!
It'll take him 7.94 x 10^7 sec to get half-way, about 2.51 years, so the total time to get to Lovelon and then back to earth will be 4 times this, or 10.07 years. They can wed in 2035 (C).
500
This is the cell potential (in volts) at 25°C for a galvanic cell composed of a standard hydrogen electrode and an electrode where the half-reaction is:
MnO4-+8H++5e-→Mn2++4H2O
given that the standard reduction potential for this half-reaction is +1.51 V.
+1.51 volts
Ppairing with a standard hydrogen electrode (0.00 V) means the cell potential equals the standard reduction potential of the other half-cell.
500
If electric energy costs $0.1 per kilowatt hour, and is delivered to your home at a voltage of 120 Volts, what is the cost of one electron? (only take the exponent for the answer, e.g 2.76x10^18, take 18)
(Note that the charge of an electron is 1.6 x 10^-19 Coulombs, and the power delivered by electric flow is equal to the voltage times the current.)
P = I V, E = I V t = C V. If C = 1.6x10^-19 Coulombs and V = 120 Volts, then the energy of one electron is:
2x10^-17 Joules = 2x10^-17 Watt Second = 2x10^-20 kW second = 7x10^-24 kW hr = 7x10^-25 Dollars. (Or only take the exponent, -24, more fermi question style)