Which of the following causes tornados a. dry climates b. sationary fronts b. condensation d. wind shear

explanation: in any substance/object, the particles inside it (atoms/molecules) constantly move in random directions and with random speeds (this motion is called brownian motion). as a result, the particles have some kinetic energy (which is proportional to the temperature of the substance).

explanation:

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when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y