Are you brainy?

1. General: What range of frequencies is usually referred to as the UHF Band?
3 to 30 Megahertz
30 to 300 Megahertz
300 to 3,000 Megahertz
30,000 to 300,000 Megahertz

2. General: The major form of pollution from a nuclear reactor is:

Radioactivity
Particulate formation
Thermal pollution
Noise pollution

3. Physics: The unit for reactance is the:

Ampere
Volt
Ohm
J/C

4. Physics: After a time of 1 time constant, the current in an RC circuit will be equal to:

50% of its initial value
37% of its initial value
25% of its initial value
63% of its initial value

5.Biology: An organism has a diploid chromosome number of 10. A cell from this organism in metaphase I of meiosis has:

10 chromosomes
20 chromosomes
10 chromotids
5 chromosomes

6. Biology: Meiosis reduces the chromosome number by:

Discarding some of the chromosomes
Reducing the length of each chromosome by half
Polar bodies forming
Duplicating DNA once, followed by two cell divisions

7. Astronomy: Why is the surface of Venus so hot?

Atmospheric carbon monoxide transmits visible light and absorbs infrared light
Atmospheric carbon dioxide transmits visible light and absorbs infrared light
Atmospheric carbon monoxide transmits infrared light and absorbs visible light
Atmospheric carbon dioxide transmits infrared and absorbs light visible light

8. Astronomy: Radar was first used to discover that Venus' rotation is:

rapid and direct
rapid and retrograde
slow and retrograde
slow and direct

9. Chemistry: A type of force that exists in molecules ICl, HBr and CHCl3 is:

Dipole-dipole interaction
Ion-dipole interaction
Ionic interaction
Metallic bond

10. Chemistry: The existence of intermolecular forces in such species as NH3 and H2O is necessary to explain:

How atoms stay together in the molecule
How the species can exist as liquids or solids
Why molecules have rigid shapes
Covalent bonding

11. Computer: What is the 2's complement of the 4-bit binary number 1010?

1011
1110
01010101
0110

12. Computer: What is the hexadecimal difference of 3A minus 2B?

99
FF00FF
1C
F

13. Biology: An example of what type of selection is the death of extremely overweight and underweight babies?

Disruptive
Directional
Stabilizing
Survival of the fittest

14: Biology: If only the largest or the smallest (not the intermediate phenotype) individuals are favored by natural selection, what type of selection occurs?

Directional
Stabilizing
Disruptive
Dimorphic

15. Physics: Which of the following effects is the same in a resistor for one ampere rms ac as for one ampere dc?

Conductance
Reactance
Oscillation
Heating