Given two vectors A= 4.00i + 7.00jand B= 5.00i-2.00ja. Find the magnitude of each vector. b.Find the vector differenceC= A –B, give its magnitude and direction. c. Draw the vector A, B and C. d.Find the scalar product of A. B e. Find the vector productD= A x B, draw D and give its magnitude.

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space. b. we'll know it immediately because it will be brighter than the full moon in the sky. c. we won't know about it until 600 years from now. d. none of the above.

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s. what is the wavelength?