Math/Physics
A car brakes to a stop over 15 meters, applying a constant force of 800 newtons to the car. In joules, what was the initial kinetic energy of the car?
12,000
Chemistry - Short Answer
Identify all of the following three statements that are true of equilibrium: 1) Increasing the temperature of an exothermic reaction will decrease K; 2) Increasing the temperature of an endothermic reaction will favor product formation; 3) Decreasing the temperature of an exothermic reaction will shift the equilibrium position toward products.
All
Earth and Space - Short Answer
Denitrification by bacteria in very low oxygen environments can lead to the production of what potent greenhouse gas?
Nitrous Oxide (Accept: N2O, Dinitrogen Monoxide)
Energy — Short Answer
Scientists at the Thomas Jefferson National Accelerator Facility are studying pions [PIE-ons]. Pions are formed from what two flavors of quarks?
Up and Down
Math - Short Answer
If f(x) is equal to the cube root of (x-6), what is f inverse of 5?
131
Biology — Short Answer
The activity of enterokinase [en-tur-o-KYE-nase] directly results in the production of what active protein?
TRYPSIN
Earth and Space - Short Answer
Order the Arctic, Atlantic, Indian, and Pacific oceans in order of increasing water contained.
Arctic, Indian, Atlantic, Pacific
Energy — Short Answer
Argonne National Lab scientists are using machine learning to understand the behavior of heat-resistant materials at very high temperatures. Place the following three materials in increasing order of melting point: 1) Stainless steel; 2) Alumina; 3) Cast iron.
3, 1, 2
Math - Short Answer
Find the value of x for which the following vectors are parallel:
4i - 3j and xi + 12j
-16
Chemistry - Short Answer
Identify all of the following three diatomic compounds that MO theory predicts to be paramagnetic: 1) B_2; 2) C_2; 3) N_2
1 (ACCEPT: B_2)
Earth and Space – Short Answer
What is the name for a front that is formed when a cold front overtakes a warm front and warm air is separated from the cyclonic center?
Occluded Front
Enegy - Short Answer
Scientists supported by the Department of Energy are developing materials to serve as artificial connections between muscle and bone. What is the term for the natural version of these structures?
Tendons
Physics - Short Answer
Three resistors are in parallel and have resistances of X, X, and 200 ohms. The equivalent resistance is 75 ohms. What is the value of X, in ohms?
240
Biology — Short Answer
What photosensitive receptor protein family is thought to be conserved across all animal species?
Rhodopsin (also accept opsin)
Earth and Space - Short Answer
What is the name for the circular ocean currents that pinch off from ocean currents in sections, causing drastic changes in the sound velocity at the interface?
Eddies
Energy - Short Answer
A team of scientists from Oak Ridge National Laboratory have been studying the enzyme RuBisCO [roo-BIS-koh] using neutron scattering and X-ray diffraction techniques. What key atom can neutron-scattering methods directly detect that X-ray methods cannot?
Hydrogen