the mass of an empty density is 20 g it's mass when filled with water is 40g and 50g when filled with filled with liquid x given the density of water if 1000kg/m3 .calculate a)mass of water. b)volume 9f water that filled the density bottle .c)volume 9f the density bottle. d)the density of liquid x

It may possibly be c i think |-/

The duration of a photographic flash is related to an rc time constantly

Since you have not included the experiment situation and the data, of course, i can not give you specific details about it. but i can you with this question.1) i will assume that the motion is projectile (parabolic) motion.2) yes, the horizontal distance depends on the horizontal velocity as, naming vx the horizontal velocity and t the time, it is: x = vx × t3) now, observe that the flight time depends on the vertical velocity as, naming voy the initial vertical velocity, t the time and y the vertical distance before reaching the ground: y = yo + voy×t - gt² / 2.the higher the initial vertical velocity (voy) the longer the object will be flying and so t will be higher in the equation for the horizontal distance.that explains the relationship between the horizontal distance and the horizontal velocity.