MathScience Field Day

1
Math/Science Field Day

• Scottsdale Community College
• January 15, 2009
• Preliminary Round

2
CHEM 1 pt

• What element is oxidized in the reaction?
• 2 AgNO3 Cu ? Cu(NO3)2 Ag

3
CHEM 2 pts

• What is the molecular shape of PF3?

4
CHEM 3 pts

• How many moles of NH3 would form when 2 moles of
  N2 and 14 moles of H2 combine in the following
  reaction?
• N2 H2 ? NH3 (unbalanced)

5
CHEM 4 pts

• Arrange the atoms in order of increasing atomic
  radius
• Ca Ge S Si Cs

6
CHEM 5 pts

• 3.0 moles of A and 4.0 moles of B are combined in
  a 1.00 L container. At equilibrium, 2.0 moles of
  A are present. Calculate K for the
  reaction. A 3 B ?? 2 C

7
PHYSICS 1 pt

• A certain adjustable seesaw is 6 m long and has a
  mass of 100 kg. If a 50 kg girl wants to seesaw
  alone, how far from her end of the seesaw must
  she place the fulcrum?

8
PHYSICS 2 pts

• Due to the force of gravity, a 2 kg meteorite
  orbits a planet at a velocity of 200 m/s. If the
  radius of the circular orbit is 1000 m what is
  the gravitational force on the meteorite?

9
PHYSICS 3 pts

• A 2 kg mass is released from rest from off a tall
  cliff. Its initial potential energy is 49 Joules.
  At the instant its velocity is 3 m/s, how high is
  it off the ground? Neglect air friction and
  assume g 10 m/s2

10
PHYSICS 4 pts

• A 1.0 kg basket ball dropped from a really high
  cliff reaches a terminal velocity of 50 m/s. What
  is the magnitude and direction of the force on
  the ball due to air resistance at terminal
  velocity? Must show all work and or reasoning.
  Use g10m/s2

11
PHYSICS 5 pts

• The ionization energy of a single hydrogen atom
  in the ground state is -13.6 electron
  volts. What is the significance of the negative
  sign? Must explain reasoning.

12
BIO 1 pt

• Among the following, who would be predicted to
  have the highest direct fitness in evolutionary
  terms?
• a. Joe, who drinks beer most of the day, eats a
  diet high in saturated fats, cant hold a job,
  has had 3 wives, 9 children and 17 grandchildren.
• b. Mary, a CEO of a major international company
  who has no time for a husband or children.
• c. Elmer, a hard-working farmer with a high
  saturated fat diet who drinks no alcohol, goes to
  church every Sunday and has 2 children.
• d. Marc, a professional hockey player with a 7
  million dollar salary, a trophy wife, 15
  mistresses, no children and a hockey injury that
  left him sterile.
• e. Ellen, a brilliant 50-year-old college
  professor of physics with a Nobel prize who is
  married to a medical doctor and has no children.

13
BIO 2 pts

• Which of the creatures pictured below is (are)
  are protosomes?

B
A
C
D
14
BIO 3 pts

• Red-green colorblindness is a sex-linked
  (X-linked) trait. A woman with normal vision has
  a red-green colorblind daughter. Give the
  genotypes of both of the daughters parents.

15
BIO 4 pts

• The gene PPARG, which codes for the peroxisome
  proliferator-activated receptor gamma protein,
  appears to be associated with both obesity and
  coronary artery disease. The gene is polymorphic,
  and at one base position some people carry a C to
  T substitution. For example, 2.5 of Australian
  Caucasians have genotype TT at this location.
  Assuming this population is in Hardy-Weinberg
  equilibrium with respect to this polymorphism,
  what is the expected frequency of Australian
  Caucasians with genotype TC?

16
BIO 5 pts

• Consider the following DNA sequence, which is the
  last exon in a functional gene. The final codon
  is a stop codon.
• 5? CGTGATCCTTTCATAAAGCGTGGCTAA 3?
• Suppose the first guanosine (the second
  nucleotide from the left) were deleted, causing a
  frameshift. As specifically as possible, describe
  how this mutation would affect the resulting
  amino acid sequence if the mutated gene were
  translated?

17
Math/Science Field Day

• Scottsdale Community College
• January 15, 2009
• Preliminary Round