Settings
Random Round
##### 1) Toss Up - Physics - Multiple Choice

The person who first realized that an electric current produces a magnetic field was
W) Hans Oersted.
X) Albert Einstein.
Z) William Gilbert.

##### 1) Bonus - Physics - Multiple Choice

The Earth’s magnetic south pole is located in
X) Australia.
Y) Russia.

##### 2) Toss Up - Physics - Multiple Choice

A child is observed to weigh 1.0 million dynes on earth. If the child tries to slide on a floor which has a coefficient of friction of 0.50 with his feet, what is the Normal force in Newtons
W) 2.25N
X) 5.0N
Y) 7.5N
Z) 20N

##### 2) Bonus - Physics - Multiple Choice

The Michelson-Morley experiment ended up with results that led to Einsteins Special Theory of Relativity. What was the experiment original purpose?
W) Calculate the speed of light
X) detect the presence of the Ether wind
Y) Measure the velocity of the Earth with respect to the Milky Way Galaxy
Z) Use parallax theory to determine the red shift of the Andromeda Galaxy

ANSWER: X) DETECT THE PRESENCE OF THE SOLAR WIND
##### 3) Toss Up - Physics - Short Answer

Every mass has a radius of a sphere that if compressed to within the radius, would turn into a black hole. What is this radius called?

##### 3) Bonus - Physics - Short Answer

The theory that black holes emit gamma ray bursts and can evaporate from mass loss is called?

##### 4) Toss Up - Physics - Multiple Choice

The LIGO, along with many synchrotron facilities, employ by necessity ultra high vacuum conditions inside the test location. An ultra high vacuum is typically characterized as one with a pressure of less than about?
W) 100 zeptopascals
X) 100 femtopascals
Y) 100 nanopascals
Z) 100 millipascals

##### 4) Bonus - Physics - Multiple Choice

At STP, the mean free path of a gas molecule is on the order of 68 nanometers. In an ultrahigh vacuum, the mean free path of a molecule is about?
W) 40 millimeters
X) 40 meters
Y) 40 kilometers
Z) 40 megameters

##### 5) Toss Up - Physics - Multiple Choice

What is the baryon number of an up quark?
W) 0
X) 1/3
Y) 1/2
Z) 1

##### 5) Bonus - Physics - Multiple Choice

The Paschen series dictates the energy produced if an electron in a hydrogen atom jumps from a higher energy level down to
W) n = 1
X) n = 2
Y) n = 3
Z) n = 4

##### 6) Toss Up - Math - Short Answer

Find \sin2\theta (read as: sine 2 theta) given that \tan\theta (read as: tangent theta) equals minus three-fourths and \theta is in the second quadrant:

ANSWER: -24/25
##### 6) Bonus - Math - Short Answer

Find the solution set of the following equation: x^2 + 6x + 6 = 0

ANSWER: -3 +- \sqrt(3)
##### 7) Toss Up - Physics - Short Answer

Giving your answer in hertz, what is the lowest frequency possible for a string that is 90-centimeters long and whose wave speed is 360 meters per second?

ANSWER: 200 (Solution: f = v/ X; = 360/1.8m = 200)
##### 7) Bonus - Physics - Multiple Choice

Current accounting of the composition of the universe suggests that dark energy and dark matter together make up about what percent of the energy in the universe:
W) 65%
X) 75%
Y) 85%
Z) 95%

##### 8) Toss Up - Physics - Multiple Choice

The heat of the Earth or outside air is used by
W) warm-air systems.
X) heat-pump systems.
Y) steam-heating systems.

##### 8) Bonus - Physics - Multiple Choice

Active and passive heating are two types of
X) hot-water heating systems.
Y) solar-heating systems.
Z) warm-air heating systems.

##### 9) Toss Up - Computer Science - Multiple Choice

Secondary storage refers to:
W) processor cache
X) hard drives
Y) system memory
Z) a CPU

##### 9) Bonus - Computer Science - Short Answer

What is the three-bit natural binary code equivalent of 3 the decimal value ^ ?

##### 10) Toss Up - Physics - Multiple Choice

Which of the following is not a vector?
W) torque
X) momentum
Y) displacement
Z) distance

##### 10) Bonus - Physics - Multiple Choice

Two small conducting spheres are separated by a distance 'r'. One has a charge of 2 microcoulombs and the other has a charge of 10 microcoulombs. If they are brought together so that they touch and are then separated to their original distance 'r', how many times greater is the new Coulombic force between them?
W) 2
X) 1.8
Y) 1.6
Z) 1.4

##### 11) Toss Up - Chemistry - Multiple Choice

Which of the following minerals is a source of iron
W) Bauxite
X) Hematite
Y) Malachite
Z) Galena

##### 11) Bonus - Chemistry - Multiple Choice

Which of the following would you measure using a calorimeter?
W) specific heat
X) weight
Y) specific gravity
Z) density

##### 12) Toss Up - Earth And Space - Multiple Choice

Which of the following is not a tectonic plate?
W) Nazca
X) Pannotia
Y) Cocos
Z) New Hebrides

##### 12) Bonus - Earth And Space - Short Answer

What is the name of the largest modern tectonic plate?

##### 13) Toss Up - Math - Multiple Choice

Where does the function y = 2x squared + 4 meet the x axis?
W) -2
X) -1
Y) 1/2
Z) none of the above

ANSWER: Z) none of the above
##### 13) Bonus - Math - Multiple Choice

If the mean of 75 items is 40 and the mean of 25 items is 60, find the mean of the 100 items.
W) Insufficient information
X) 45
Y) 42
Z) 48

##### 14) Toss Up - Physics - Short Answer

What is the torque in N*m (read as newton meters) acting on a disk with radius of 3 meters, mass of 5kg, and rotating with an angular acceleration of 10 rad/sA2?

##### 14) Bonus - Physics - Short Answer

If a sphere with radius of 4 meters and a mass of 5kg is rolling at a velocity of 12m/s, find the total energy of the sphere in joules.

##### 15) Toss Up - Chemistry - Short Answer

Normal hydrogen at room temperature contains what two forms of hydrogen, as defined by the spins of their electrons and nuclei?

##### 15) Bonus - Chemistry - Multiple Choice

If you were looking to purchase magnesium sulfate in a retail store in the U.S., which of the following would you be correct in buying:
W) alum
X) cream of tartar
Y) soda ash
Z) Epsom salt

##### 16) Toss Up - Biology - Multiple Choice

Which of the following is LEAST accurate regarding Avian migratory patterns:
W) migration of birds from the tropics to the northern latitudes is typically endogenously controlled
X) the migratory timing of many birds is being affected by global change
Y) both large and very small birds migrate long distances
Z) breeding in most birds is timed to be when fewest predators are present

ANSWER: Z) BREEDING IN MOST BIRDS IS TIMED TO BE WHEN FEWEST PREDATORS ARE PRESENT
##### 16) Bonus - Biology - Multiple Choice

Which of the following MOST likely occurs during speciation (read as: spee-cee-A-tion):
W) increased mutation rates
X) reproductive isolation
Y) elimination of recessive alleles

##### 17) Toss Up - Biology - Short Answer

Name the genus of mosquito that most frequently serves as the vector for the debilitating dengue [DENG-gay] fever.

##### 17) Bonus - Biology - Short Answer

Indicate, respectively, the term to describe the stage in which two genetically different nuclei occur in the same cell, and the principal kingdom in which the stage occurs as a normal part of the organism’s life cycle.

ANSWER: STAGE = HETEROKARYOTIC; KINGDOM = FUNGI
##### 18) Toss Up - General Science - Short Answer

What is the term for death related to exposure to cold weather or water?

##### 18) Bonus - General Science - Short Answer

What is the branch of mathematics concerned with the inferences that can be drawn from numerical data on the basis of probability?

##### 19) Toss Up - Chemistry - Multiple Choice

Forces in ionic crystalline solids are primarily which of the following?
W) Covalent
X) Electrostatic
Y) Van der Waals
Z) Magnetic

##### 19) Bonus - Chemistry - Multiple Choice

The major constituent of marsh gas is:
W) methane
X) propane
Y) benzene
Z) ethanol

##### 20) Toss Up - Math - Multiple Choice

What is the derivative of y = (3x + 1)^2 [y equals 3x plus 1 quantity squared]?
W) 18x+ 6
X) 18x
Y) 6x + 1
Z) 6x + 2

ANSWER: W) 18x + 6
##### 20) Bonus - Math - Short Answer

What is the equation, in slope-intercept form, of the perpendicular bisector of the line segment with endpoints (4, 10) and (-6, 8)?

ANSWER: y = -5x + 4
##### 21) Toss Up - Chemistry - Multiple Choice

Which of the following statements is usually TRUE about an unsaturated fatty acid?
W) It is from vegetable sources and is solid at room temperature
X) It is from vegetable sources and is liquid at room temperature
Y) It is from animal sources and is solid at room temperature
Z) It is from animal sources and is liquid at room temperature

ANSWER: X) IT IS FROM VEGETABLE SOURCES AND IS LIQUID AT ROOM TEMPERATURE
##### 21) Bonus - Chemistry - Multiple Choice

Making biodiesels is a transesterification reaction. Which of the following represents the product(s) of this reaction?
W) Phosphodiesters and glycerol
X) Fatty acid esters and glycerol
Y) Fatty acids and alcohol
Z) Acetyl-ethyl ester

ANSWER: X) FATTY ACID ESTERS AND GLYCEROL
##### 22) Toss Up - Math - Short Answer

What are the lengths, in centimeters, of the hypotenuse and the longer leg, respectively, of a 30-60-90 degree right triangle if the shorter leg is 12 centimeters long?

ANSWER: Hypotenuse = 24; longer leg = 12sqrt(3) (accept: longer leg = 20 - 21)
##### 22) Bonus - Math - Short Answer

Find the product of the following, giving your answer without negative Exponents: (x^-2 + y)(x^2 - y^-2)

ANSWER: 1 - 1/(x^2 * y^2) + x^2 * y - 1/y
##### 23) Toss Up - Biology - Short Answer

Indicate the name of the common and treatable condition that occurs when a person’s eyeball is longer than normal and the lens focuses distant objects in the front of the retina.

##### 23) Bonus - Biology - Multiple Choice

Quorum [KWOHR-uhm] sensing in bacteria occurs when bacteria "sense” other bacteria. Which of the following triggers this phenomenon to occur?
W) Number of bacteria
X) Density of bacteria
Y) Production and detection of autoinducers
Z) Bacterial fission

ANSWER: Y) PRODUCTION AND DETECTION OF AUTOINDUCERS
##### 24) Toss Up - Chemistry - Short Answer

Which metallic element is in the liquid state at room temperature?

##### 24) Bonus - Chemistry - Multiple Choice

In a gaseous, exothermic reaction, which of the following changes makes no difference to the position of equilibrium?
W) Change of Temperature
Z) Removing products

##### 25) Toss Up - Earth And Space - Multiple Choice

Which of the following is the definition of dew point?
W) The ratio of actual water vapor compared to saturated water vapor in the air
X) The ratio of liquid water to water vapor in the air
Y) The temperature at which the air is saturated with water vapor
Z) The temperature at which water evaporates into the air

ANSWER: Y) THE TEMPERATURE AT WHICH THE AIR IS SATURATED WITH WATER VAPOR
##### 25) Bonus - Earth And Space - Short Answer

What phenomenon is recorded in the changing orientation of iron-bearing minerals on the surface of the oceanic crust?

ANSWER: MAGNETIC POLE REVERSAL (ACCEPT: FLIPPED/ALTERNATING MAGNETIC FIELD)