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### 19 Cards in this Set

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 Centripetal force center-seeking force, Earth's gravitional force supplies this force for a satellite What formula relates voltage, current, and power? P=IV What formula relates voltage, current, and resistance? V=IR KINEMATIC EQUATIONS 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 F=ma -object can be accelerating in the direction of Fnet, but not moving in direction of (velocity in direction of) Fnet Fgrav=? and when w=mg=Fgrav Fgrav= (GMm)/r^2 g=(GM)/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) PURINES VS. PYRIMIDINES 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 Nucleotides 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