Physics
Initially, an object with a mass of 2kg has a speed of 2 m/s. A force then acts upon it with strength 10N for 14m. What is the final momentum of the object? (1:30)
24 kg m/s (Accept 24)
What are the first three noble gases? (1 minute)
Helium, Neon, Argon
Name two of the three parts of cell theory. (1 minute)
Answers:
All living organisms are composed of one or more cells.
A cell is the basic structural and functional unit of living organisms.
All cells arise from pre-existing cells.
What is the most common element in the earth’s crust?
Oxygen
An electron travels on a path in an electric field as shown below. How much work does the electron do to travel along the path (in Joules)? Note: Sign matters. (Charge of electron is 1.6x10-19 C) (2 minutes)
8.0x10-18 J
Accept 0.000000000000000008J
Order the following substances in terms of increasing acidity (least acidic first): H2SO4, HCl, NaOH, and CH3COOH. (2 minutes)
NaOH, CH3COOH, HCl, H2SO4
200: During what stage of meiosis does random orientation occur? (1 minute)
Answers: Metaphase I
What is the most common symptom of GERD (gastroesophageal reflux disease)?
Heartburn
Oxygen-15 is a highly unstable isotope of oxygen (half-life = 2.04 minutes) and quickly becomes Nitrogen-15, emitting two particles in the process. What are these two particles? (2 minutes)
Positron/Anti-electron/Beta-positive particle (do not beta particles)
Neutrino/Electron Neutrino (do not accept anti-neutrino)
What gas is released by volcanoes that leads to the formation of acid rain? (2:30)
Sulfur Dioxide (Accept Sulfur Trioxide)
Mutations in what two classes of genes involved in the regulation of the cell cycle lead to cancer? (2:00)
Answers: Proto-oncogenes and tumor suppressor genes
Normal, reverse, strike-slip, and oblique are the four types of what thing found on Earth’s crust?
A: Faults/Fault Line/Tectonic Boundary
What flavor of quark do the following three baryons have in common: protons, Ξ0, Σc+ have in common? (2:30)
Up quarks
Protons: uud, Ξ0 = uss, Σc+ = udc
Which of the following species are non-planar? (3 minutes)
CO32-, BF3 , NH3, C (graphite), XeF4, MnO4-
NH3 and MnO4-
A population of cats can be either black or white; the black allele (B) has complete dominance over the white allele (b). Given a population of 1,000 cats, 840 black and 160 white, determine the number of cats with the Bb genotype and what color they would be. (4 minutes)
Answers: 480 black cats, Bb genotype
Why is the north star always in the northward direction?
It's not...
Constellation Drift
Einstein’s theory of general relativity predicts that at large scales, the universe can either expand, shrink, or remain static, which depends on a constant of nature. What is this constant called and what is one assumption used in reaching this conclusion? (4 minutes)
Cosmological Constant (Accept Lambda)
Homogenous/Isotropic Universe
Calculate the equilibrium constant for the reaction Fe + CuSO4 ⇌ FeSO4 + Cu at 25°C. (Given E°(OP/Fe) = 0.5 V°, E°(OP/Cu) = −0.4 V)
Additional information: ΔG°=–nFE°cell,
R = 8.31 J /mol/K , F = 96485 C/mol
3.22 x 1030
What does the arrow on the diagram show?
Answers: Chloride shift, Hamburger phenomenon, lineas phenomenon
The young of birds such as geese and chickens follow their mothers spontaneously from almost the first day after they have hatched for food or protection
What is this type of behavior called?
A: Imprinting