1. A car moves 20 m/s east for 5 sec, 10m/s north for 10 sec and then 30m/s west for 5 sec. Calculate a) displacement b) average velocity
2. A cyclist ride his half journey at 10 m/s and the rest at 8 m/s. calculate his average speed.

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What are similarities and differences between refraction, reflection, diffraction and absorption?

Because atoms of elements in the same group of thbecause atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t fe periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t f

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?