How do chemical and nuclear reactions differ? a. chemical reactions involve conversions between matter and energy, while nuclear reactions do not. b. nuclear reactions do not affect the nuclei of atoms, but chemical reactions do affect nuclei. c. matter is conserved in nuclear reactions but is not conserved in chemical reactions. d. the types of atoms present change in nuclear reactions but do not change in chemical reactions.

Aregular polygon has angkes of size 150° each. how many side has the polygon

Part f - example: finding two forces (part i) two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).

What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical