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19 Cards in this Set

  • Front
  • Back
Centripetal force
center-seeking force, Earth's gravitional force supplies this force for a satellite
What formula relates voltage, current, and power?
What formula relates voltage, current, and resistance?
1) d= 1/2 (V0 + Vf) t
2) Vf= V0 + at
3) d= V0t + 1/2 a t^2
5) Vf^2= V0^2 + 2ad
How would one determine the beat frequency between two sinusoidal waves?
By taking the difference of the two wave frequencies.
Newton's 1st Law
aka Law of Inertia
An object's state of motion-its velocity-will not change unless a force acts on the object.
-if the object is at rest, it will remain at rest
-if the object is moving, then it will continue to move with constant velocity (constant speed in a straight line)
Newton's 2nd Law
-object can be accelerating in the direction of Fnet, but not moving in direction of (velocity in direction of) Fnet
and when w=mg=Fgrav
Fgrav= (GMm)/r^2
Newton's Third Law
Forces in opposite directions, acting on different objects
-form an action-rxn pair
-if different masses, accelerations will be different, but this is the EFFECT of the forces and 3rd law only concerns itself w/the rxn, not the effects
DOES Fnet=0 mean that v=0?
Not necessarily. Fnet=0 means that an object won't accelerate--can still be moving, but velocity is NOT changing
Does the weight or mass of an object differ on another planet?
It's mass is ALWAYS constant. It's weight, however, changes.
F gravitational=
GMm/ r^2
-remember: this is a pulling force (not pushing!)
Kinetic vs. Static Friction
Kinetic friction- when there is relative movement between the surfaces
Static friction- greater than coefficient of kinetic friction b/c capable of being stronger, when there is no relative movement between the surfaces in contact (no sliding)
Acceleration on an inclined plane=
g sin (theta)
purine- guanine & adenine
pyrimidine- cytosine, uracil, & thyamine
What is a nucleoside?
A ribose with purine or pyrimidine linked to the 1' C in a B-N glycosidic linkage
In dilute solution, adenine and thymine will H bond to each other or water?
water, to each other in the double helix
are phosphate esters of nucleosides with 1, 2, or 3 phosphate groups joined to the ribose ring by 5' hydroxy group
Backbone and variable portion of protein?
backbone- peptide bonds with a carbon between them
variable portion- R group attached to alpha carbon