2. determine if work is being done on the objects in the following three situatios:
a. lifting a spoonful of soup to your mouth
b. holding a stack of books motionless over your head
c. letting a pencil fall to the ground
3. descride how a ramp can make lifting a box easier without changing the amount of work being done.

Give an example in which the electrical energy changes to light energy

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.

Ihave this 50 question test the layer of earth's atmosphere where atoms and molecules escape into space is referred to as the a) exosphere b) ionosphere. c) mesosphere d) thermosphere