Justin bleeber is conducting a calorimetry experiment in chemistry class. he fills an empty soda can with water and hangs it from an iron ring. the can hangs above a cracker that is resting on a stand. justin uses his striker to light a bunsen burner. he uses the flame from the bunsen burner to light a wooden splint. the wooden splint is used to ignite the cracker. as the cracker burns it heats up the water in the soda can. waves of gas are seen coming out of the top of the can.
how many chemical changes did justin observe?
a) 1
b) 2
c) 3
d) 4

the answer is: they rebelled against saddam hussein’s rule.

kurds opposed saddam rule and wanted independence. kurds in the north and shiites in the south revolt against hussein.

for example, the halabja attack in 1988 conducted against the kurdish people by the iraqi regime under saddam hussein, where between 4000 people are killed and around 9000 are injured.

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.