Math
The value of 1/3 of 630 is
2 x 629
what is kgm/s a unit of?
momentum
Which of the following elements is not a metal?
Se Sn Sr Sc Cs
Se
What does DNA stand for?
Deoxyribonucleic acid
number of bones in the human skeleton
206 (+1 in the morning)
the sum of Vabby's and Jasmine's ages is 34. The sum of Mr.Chow's and Jasmine's ages is 55. Vabby is 7 years old. How old is Mr.Chow?
28
How much work will Jasmine do if she lifts her 1kg Extended Essay 1m above her desk and then places it back down? (assume g=10)
zero.
1. Jasmine has no EE
2. displacement is zero
the substance that is dissolved in solution
the solute
what are nucleotides?
neuclic acid base pairs
Who was Alexander Graham Bell?
inventor of the telephone
The length of a rectangle is 6 more than twice its width. If the perimeter of the rectangle is 120, what is its width?
18
What happens when the angle of incidence is greater than the critical angle when a beam of light travels from a substance of greater to one of a lower refractive index?
total internal refraction
[Ar] 3d7 4s2
Cobalt
A cell that does not contain membrane-bound organelles.
prokaryote
the hardest substance in the human body
tooth enamel
The lines ax+y = 30 and x+ay = k intersect at the point P(6,12). Determine the value of k.
42
The line ax+y = 30 passes through the point (6,12), so 6a+12 = 30 or 6a = 18 or a = 3. This tells us that the line x + 3y = k also passes through the point (6, 12), so 6 + 3(12) = k or k = 42.
what mathematical law describes any physical quantity emitted from a point-source?
the inverse square law
what word describes the phase change from gas to plasma?
ionization
energization
What system is essential in regulating growth and development, metabolism, as well as reproductive processes and mood.
the Endocrine system
what animal has the highest blood pressure?
giraffes
If 2200 x 2203 + 2163 x 2241 + 2216 x 2277 = 32n , what is the value of n?
81
what is the speed of light in water? (3 sig figs)
2.25 x 108 m/s
refractive index of water: 1.3333333333
speed of light in vacuum: 3.00 x 108 m/s
3.00 x 108 / 1.33333333 = 2.25 x 108 m/s
Which of the following has the highest concentration in air at STP?
He H2O CO2 N2 O2
N2
What is homeostasis?
the state reached when each part of the body functions in equilibrium with other parts.
what was the NIST Kibble Balance used for?
redefining the kilogram