a reference gives the molar enthalpy of combustion for methane as -803 kj/mol. what is the minimum mass of methane must be burned to warm 4.00 L of water from 22.4 C to 87.6 C, assuming no heat loss?
Posted 6 years ago by Woodsm in Chemistry 30 | 2 answers
#chemistry 30
if f(x) = x2+4x+4, then the }domain of y= 1/ f(x) is
a. {x cannot equal -2, 2, xER}
b. {x cannot equal to - 2, xER}
c. {x cannot equal to 2, xER}
d. { xER}
Posted 6 years ago by gurleenm in Math 20-1 | 2 answers
#absolute values #reciprical functions
For each square root name the 2 closest perfect squares and their square root
1) square root of 5/10
2) square root of 1095/10
Posted 6 years ago by Annika123 in Math Grades 7-9 | 3 answers
#square root
Regarding last question.
i never learnt that formula we have been using and for all other questions used 1 of two formulas sn=t1(r^n-1) / r-1 or sn=rtn-t1 / r-1
prev question
# 14 in the pre calculus textbook in Alberta
suppose a set of 10 beads were laid in a line where each successive bead had a diameter that was 3/4 of the diameter of the previous bead. If the first bead had a diameter of 24mm, determine the total length of the line of the beads. Express your answer to the nearest millimetre.
Posted 6 years ago by Sm10002 in Math 20-1 | 2 answers
#geomentric series
# 14 in the pre calculus textbook in Alberta
suppose a set of 10 beads were laid in a line where each successive bead had a diameter that was 3/4 of the diameter of the previous bead. If the first bead had a diameter of 24mm, determine the total length of the line of the beads. Express your answer to the nearest millimetre.
Posted 6 years ago by Sm10002 in Math 20-1 | 2 answers
#geomentric series
Sketch the graph y= 1/3x-6, outlining the steps used.
Posted 6 years ago by Veronica in Math 20-1 | 2 answers
#absolute values
use the graph of y= 1/ f(x) to graph y= f(x)
Posted 6 years ago by gurleenm in Math 20-1 | 3 answers
#absolute values
the Equation $\left|x^2-px+5\right|=7$|x2−px+5|=7 has real solutions
A. only when p2 > or equal to 48
B. Only when p2 < 48
C. for any p-values
D. for no values of p
Posted 6 years ago by gurleenm in Math 20-1 | 2 answers
#absolute values
when an object is dropped from the top of a 75 ft tall building, the object will be h feet above the ground after t seconds,where t = $\frac{1}{4}\sqrt{75-h,}h\le75$14 √75−h,h≤75. How far above the ground will the object be after 1 s? Later verify answers.
Posted 6 years ago by gurleenm in Math 20-1 | 1 answers
#radicals
when an object is dropped from the top of a 75 ft tall building, the object will be h feet above the ground after t seconds,where t = $\frac{1}{4}\sqrt{75-h,}h\le75$14 √75−h,h≤75. How far above the ground will the object be after 1 s? Later verify answers.
Posted 6 years ago by gurleenm in Math 20-1 | 1 answers
#absolute values
12 minutes ago
If I'm understanding this correctly you need to set up a sum series function:
$\sum_{x=0}^9=24mm\left(\frac{3}{4}\right)^x$∑x=09=24mm(34 )x
Note that the end of the series is 9, because for many series calculations the end of the series is (x-1).
Plug this formula into your calculator, or an excel sheet if you can, and you should get an answer of 90.59mm which makes the answer: Distance = 91mm.