The earth exerts the necessary centripetal force on an orbiting satellite to keep it moving in a circle at constant speed. which one of the following statements best explains why the speed of the satellite does not change although there is a net force exerted on it?
a) the satellite is in equilibrium.
b) the acceleration of the satellite is zero m/s2 .
c) the centripetal force has magnitude mv2 /r.
d) the centripetal force is canceled by the reaction force.
e) the centripetal force is always perpendicular to the velocity.

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

An ionic compound can conduct electricity when a it is dissolved in water b its crystals are ground into powder c it is in solid form d it is heated to just below its melting point

Consider a file currently consisting of 200 blocks. assume that the file control block (and the index block in the case of indexed allocation) is already in memory. calculate how many disk i/o operations are required for contiguous, linked, and indexed (single-level) allocation strategies, for each of the conditions listed below. in the contiguous-allocation case, assume that there is not room to grow at the beginning but there is room to grow at the end. also assume that the block information to be added is stored in memory.