Billiard ball A, mass 0.17 kg, is moving due east with a velocity of 4.0 m/s. It strikes stationary billiard ball B, which has the
same mass. After the collision, ball A moves at an angle of 30°
north of east with a velocity of 3.5 m/s. Ball B moves at an
angle of 60° south of east. What is the speed of ball B?

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.

If 150 kcal of heat raises the temperature of 2.0 kg of a material by 400 f°, what is the specific heat capacity of the material? 0.75 kcal/kg ∙ c° 1.35 kcal/kg ∙ c° 0.19 kcal/kg ∙ c° 0.34 kcal/kg ∙ c°

Suppose that the half-life of an element is 1000 years. how many half-lives will it take before one-eighth of the original sample remains? 8 125 12.5 3