# Posts by Homework

Total # Posts: 47

chemistry
How to find delta H using calorimetry?? I know the answer but I m having trouble getting there!? 5.5 grams of C2H6 are burned in a bomb calorimeter with the heat of 4.96kJ/degree Celsius and holds 1000g of H20. the change in temperature is 11.34 which i solved and you use it ...

math ( help)
If I told you a triangle with sides 45 cm, 60 cm, and 75 cm was a right triangle, how would you verify my statement? Develop an argument to convince yourself and your partner that my statement is correct.

pre calc
why does x^4+7 and x^4 have the same derivative, meaning can someone explain to me why they are both equal to the derivative 4x^3?

Math
I forgot it was m = -1/2 amd P(5,-2)

Math
Find the equation of a line with the given slope and passing through the given point, P. d) m = -1/2, P(-2,6)

math
Find their slopes and conclude whetever the lines are parallel, perpendicular or neither a) y = 3 x = - 2 b) y = -4 y = x

chemistry
If a container is heated with CaCO3, the compound decomposes into CaO and CO2. If the container and CaCO3 originally weigh 30.08g and loss 4.40g during the heat, what is the mass of the empty container?

chemistry
this is a C1V1=C2V2 type question: if a container has 100ml of 1.5M Br, what is the concentration in that container?

chemistry
How many sig figs do i write down for this: (2.06/5.999)+156.5?

physics
how do i find maximum height (meters) and initial velocity (m/s) if i have the time (seconds), horizontal range, and horizontal velocity

physics
how do i find the horizontal velocity (m/s) when i have the angle, the time, and horizontal range?

biology
what does an inhibitory interneuron do?

english
what verb tense is "having spent"

physics
How do you draw a force diagram for an object that is tied to a pole and is moving in a constant circular direction?

biology
Where is the spinal nerve and what is it made of?

biology
why does the knee jerk reflex work for someone with spinal cord injuries?

biology
why does the knee jerk reflex still work for people who have spinal cord injuries?

biology
how is the knee jerk reflex (like when a hammer hits the knee and the leg stretchs out) related to proprioception? if someone doesn't have proprioception why would their leg not move when it is hit by the hammer?

biology
would it be easier if someone who doesn't have proprioception to go to space and return back to earth to walk normally or would it be the same?

biology
If you were testing a reflex on your knee, why would that be slower than a conscious reflex (like if someone told you to grab something right when it falls) in your brain?

english

english
how do you make this into an x bar tree: the boy sat quietly on the top of his bed

physics
if someone throws a .1kg ball at the speed of -25m/s, why is the average net force positive instead of negative?

english
what is the verb for this, "he should be more careful"

english
what is the verb in this sentence? "You can remove the bag."

english
what is the verb in this sentence? "You can remove the bag."

chemistry
how do you convert 7.5% w/v NaCI to mM

science
how can I convert 1% w/v to g/ml

chemistry
how many g/ml are there in 1M?

Educational technology and online learning
Can I get help with that

Educational technology and online learning
1) Contact clues can be used to determine the _________ of an unfamiliar word. A.meaning B.pronunciation C.tense D.part of speech 2) if a sentence contains context clues, these clues are usually located _________ the unfamiliar word. Often, though, the context clues are in ...

Math
For a scavenger hunt, Chessa put one coin in each of 10 small boxes. Four coins are quarters, 4 are dimes, and 2 are nickels. How could you simulate choosing one box at random? Would you use the same simulation if you planned to put these coins in your pocket and choose one? ...

Math
A high school has 438 students, with about the same number of males as females. Describe a simulation to predict how many of the first 50 students who leave school at the end of the day are female.

math
For a scavenger hunt, Chessa put one coin in each of 10 small boxes. Four coins are quarters, 4 are dimes, and 2 are nickels. How could you simulate choosing one box at random? Would you use the same simulation if you planned to put these coins in your pocket and choose one? ...

science
Determine graphically the equilibrant of two forces of 15N and 20N if the angle between them is 135degrees

math
3 apples plus 2 pears cost .78 but 2 apples and 3 pears cost .82. What is the cost of 1 apple and 1 pear?

science

science
1.why is freshwater a limited resource? a)because most water on earth is in lakes** b)because most water on earth is in clouds c)because most water on earth is in the ground d)because most water on earth is salt water

social studies

social studies
1.which of the following do historians not consider a legacy of the Byzantine Empire? a)Justinians code: an organazation of roman laws*** b)Eastern orthadox church: a combination of Eastern culture and christianity c)cyrillic alphabet: a combination of greek and latin letters...

Social Studies
!. how is the size of a legislative district determined A. by geographical boundaries B. by city limits *** C. by the apportioned population D. by county boundaries 2. the term bicameral legislature refers to two of what A. chambers of the General Assembly B. state senators in...

Math Help
Use all digits in the box time to solve puzzle. 2, 9, 4, 3, 6, 7. Difference between these two numbers is 377. What are the numbers?

Hybrid