Phương trình chuyển động của một chất điểm có dạng 2 ( ) 2 . 2      r t t i t j . Quỹ đạo của chất điểm là đường

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?