1.
when a basketball player jumps to make a shot,

the force with which he jumps is equal to the force with which he shoots the ball

the downward force on the floor is equal to the upward force on his feet

the forces on the player’s feet and on the floor are both in the upward direction

the action-reaction forces are unequal because they act on different objects

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н, о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp