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Physics
Multiple Choice Question with Only One Choice Correct What happens if a vector is multiplied by a number 2? (a) The magnitude of the vector is doubled but its direction remains the same (b) The magnitude of the vector remains the same but its direction is reversed (c) The magnitude of the vector is doubled and its direction is reversed (d) Neither the magnitude nor the direction of the vector undergo any change
Chemistry
True or False : Magnesium can be extracted from seawater by the Dow process.
Mathematics
Let the harmonic and geometric means of two positive numbers be in the ratio 4 : 5. Then the two numbers are in the ratio ............. .