50 points!
go around your house and hit (or tap) ten different objects. the objects should be different shapes and made of different material (choose things to hit that won’t each object is a different medium for sound. try to hit each using the same amount of energy.

describe each object that you hit. what is its shape and what is it made of? then describe how it sounds to you. does it transmit sound well? does it absorb sound? is the sound loud or soft? is there a “ring” to the sound? does it sound like a “thunk” or does it sound like a drum?

rank the ten objects from loudest to softest.

draw some conclusions based on your results from steps 1 and 2. for example, are there a certain shapes or materials that are better or worse media for sound travel?

the velocity you are looking for is made up of two parts: horizontally velocity, vh, and its vertical velocity, vv. the actual velocity of the ball will be these two parts added together, and because velocity is a vector then they will need to be added vectorially.  

neglecting air resistance etc etc.,  

the horizontal velocity component will be constant (because there is no accelerating force in the horizontal direction.  

vh = 8 ms-1  

the vertical velocity component has an accelerating force: 'g'.  

using v = u +at where a = g = 9.81 ms-2.  

the vertical component of velocity, vv = 0 + gt = vv =9.81 x 2  

vv = 19.62 ms-1 . the zero appears because the virtical component of velocity at time t=0 is zero. remember, the ball was thrown horizontally.  

how fast it will be moving (it actual path (being a parabola )) will be the vector sum of these two.  

adding vectorally gives: -  

v = sqr root (8^2 + 19.62^2) = sqr root(64+384.9) = 21.18 or 21.2 ms-1

i sometimes feel that way too. i feel that i should hurt someone because they hurt me, but i wouldnt do it. that would make things so much worse i have so much experience with this stuff

explanation:

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..