Posts by h

Total # Posts: 223

Biology
which invertebrate made the transition to life on land,they forced two challenges- the first was to avoid drying out and the second was to develop a means to obtain oxygen. which invertebrate made the transition successfully and what adaptations have they evolved to cope with ...

Biology
Beside parasitism, invertebrates exhibit various other symbiotic relationship explain with examples? Please help me

Math
Use benchmark to estimate the sum, difference, or product 14/16 + 1/5 A - 2 B - 0 C - 1/2 D - 1 My answer is A

READING
Use the sentence parts below to create a sentence with one or more adjectives. My sentence - The van she said had polka dot tires and tinted windows. Is this correct? Words - Had The Van She said Windows and polka dot tinted tires . ? !

READING
A?

READING
The press had no response for her accusation of slander. Which literary device does the author use in this sentence? 1. alliteration 2. metonymy 3. oxymoron 4. simile My answer is Number 2. B

math
choose all the expressions with a sum greater than 10. 5.3 + 4.99 6.12 + 3.09 2.08 + 7.9 4.8 + 5.9 3.46 + 6.009

Chemistry
Activity Coefficient for Phosphate Buffers: How would I calculate the predicted pH for Na2HPO4 and NaH2PO4? For hypothetical pH 6- we added 94mL of H2PO4 and 6mL of HPO4 (for a total of 100mL). But how would I calculate "actual pH"? We measured at two different ...

Chemistry
But doing this for 6 won't work out because you'll get a non real answer for the log....

science
A substance has a half-life of 10,000 years and an initial mass of 1,000 grams. How many years will pass before only 250 grams of the substance's parent material is left?

Math
If y = x^3 + 2x^2 if reflected across the line y =x, what is the resulting equation? This is what I have so far: x = y^3 - 2y^2 x = y^2 (y - 2) x/(y-2) = y^2 <---- this is where my problem starts, I know I am not supposed to have y on both sides but am unsure as to how I ...

Physics special relativity
The distance from earth to the galactic centre is 23000 ly. What constant speed would be required to make the journey in 30 y of an astronaut's lifetime? I know the answer should be 0.99999915c but don't know how to get there with time dilation or length contraction

physics
A billiard ball travels 22 cm in the positive direction, hits the cushion and rebounds in the negative direction, and finally comes to rest 7.5 cm behind its original position.

English
correct

language arts connection academy
Yes, it's 3

algebra
What are the coordinates of these two equations after solving using substitution? 2x-y=-11 and x+4y=17

stats
106.9 oz

Science. Answer Check
ur right hell ya

math
Solve the proportion using cross products. 8/20 = k/110 (A)99*^* (B)122 (C)3.3 (D)2.9 Am I correct? please asap

Social Studies
is it A? I'm taking this test

Government
100%

science
2. How many grams of 96.5% pure NaOH pellets do you need to make 1.000 liter of 1.50 N NaOH?

Physics
22.5

Science HELP!!!!
4 is incorrect

english
Getting done a plastic surgery will contain side effects leading quite severe pains such as: back pain, bruises and so on. This is so serious that you may have to wear head bandages after a surgery. Getting done a plastic surgery will contain side effects is not correct

Language
this is wrong because i got a 13.3 and it was bca

Physic
You pull a 30.5 kg wooden box with a rope that makes a 23.0° angle with the horizontal at a constant speed. The coefficient of kinetic friction between the box and the deck is 0.330. You pull the crate a distance of 5.25 m. How much work was done? Do you use f=ma and how ...

Social Studies
those were right

statistics (math)
17.76

d
divide 120 into two parts , so that thrice the smaller one is equal to twice the larger one.

e
if 3 i subtracted from a number and reminder is multiplied by 13, the product becomes 91.find the number.

Economics
22

Life orientation
wat is the da question

AP Physics
A bridge 30 m long crosses a chasm. If the bridge is inclined at angle of 20 degrees to the horizontal, what is the difference in height of the two ends of the bridge?

Finite Math
dk

Chemistry
How much heat would be absorbed by 55 grams of copper when heated from 24 degrees Celsius to 40 degrees Celsius? The specific heat of copper is .385 My answer is 338.8 Joules. Is this correct?

HELP PLEASE NOW
He can't see it if you are using a VPN! ;)

PHYSICS
WHAT IS CENTER OF MASS?

algebra
h

english
Water puts out a fire. Cold words calms down an angry person. What are some examples of cold words?

english
What does this quote mean: “Fire hath its force abated by water, not by wind, and anger must be allayed by cold words and not by blustering threats.” Please help. I have no idea.

History
hjlgkutfytc

History
hhhhhhhhhhhhhhhh

English
A b c d

math
d=69&a1=2

bible
Our God is amazing. List five descriptive words that you would use to describe the mind of our God. Think of creation and what the Lord did.

physics
jyhdjdjtdj

chemistry
4,4

physic
bbb

Ed. Tech
A,D,B are the answers

statistics
suppose that the teacher of this class graded solely on a curve - 10% get A, etc. How might this effect students getting into into study groups to prepare homework or tests?

geometric sequence
what are you dividing??

geometric sequence
The sum of the 2nd and 5th terms of a geometric sequence is 3.5. The sum of the 3rd and 6th is -7. Determine the ratio r of the sequence and the first term a.

chemistry
If 70.0 mL of water is added to 30.0 mL of 0.400 M solution of NaOH, what is the new concentration of NaOH?

History on Middle Ages(PLEASE HELP NOW)
C!! just took the quiz and got all of it right!

Physics
An 80.0 kg rollerblader is at rest at the top of a 100 m hill at a 7o incline. The coefficient of friction on the hill is 0.110. What is the roller blader's kinetic energy at the bottom of the hill?

Language Arts
yepppppppppppp

business
C

maths
Two sides

Math
108

Reading Skills
d

chemistry
The density of 19.0% by mass of nitric acid, HNO3 is 1.11 g cm-3. Calculate the volume (dm3) of acid needed to prepare 2.00 dm3 of 3.00 mol dm-3 HNO3 solution. (FW HNO3 = 63 g/mol)

english
What is the tone in "a thankless experience

Science
Thank you! Hope these are correct

Help?
hes right

math
dunno

math
2,3,5,7,8,6

calculus
A closed cardboard box is made with a square top and bottom, and a square horizontal shelf inside that divides the interior in half. A total of 12 square meters of cardboard is used to make the top, sides, bottom, and shelf of the box. What should the dimensions of the box be ...

calculus
A dog kennel with four pens is to be constructed. The pens will be surrounded by rectangular fence that costs $23 per meter. The rectangle is partioned into four pens of equal size with three partitions made of fence that costs $12 per meter. Each pen measures x meters wide by...

Chemistry
this was no help. at. all.

Math
0 is the intercept because the line passes through the axis at X=0 or y=0

Calculus
27 ft of wire is to be used to form an isosceles right triangle and a circle. Determine how much of the wire should be used for the circle if the total area enclosed is to be a maximum? I can only find the minimum because the parabola is opening upward

Chemistry
Electron exhibiting a particle wavelength of 7.18 x 10-9 are emitted from hydrogen atoms after interaction with high energy photons. Assuming that the electrons in the hydrogen atom were in their ground state prior to interaction, determine the wavelength of the photon which ...

(History)
jhg

History Question
wow, ms sure you were wrong! thank you NO, for the answers! yours was all correct!

microeconomics
Question 20 of 20 5.0 Points If the government attempts to control pollution with a command-and-control policy: A. the government will control the firm's entire production process. B. the government will force the firm to use particular pollution-control technologies. C. ...

physics
a large bus and a van, both moving with a velocity of magnitude v, have a head-on-collision and both the vehicles stop after the collision. if the time of the collision is 1 sec then, a) which vehicle experiences smaller force of impact? b) which vehicle experiences the ...

Physics
Suppose that we repeat the experiment shown in the video, but we replace one of the cylinders with a cylinder that has twice the radius (and use larger containers of water). If the height of the original cylinder is \rm h, how deeply must we submerge the new cylinder to get ...

chemistry
sadf

math
hhhhfdhfg

math
huj

Calculus
no

health
55

math
2

physics
6.213105e-10

Math
You

physics
3.5x10^9

physics
A key falls from a bridge that is 45 m above the water. The key falls straight down and lands in a model boat traveling at a constant velocity of 3.5 m/s. Calculate the distance the boat was from the point of impact when the key was released. Answer d= 10.6 m

physics
A ball is dropped from the top of a building. The balls fall 3 times farther during its last second of freefall than it did during its third second of freefall. The ball fell 4.9 meters during its first second, how tall is the building and how much time is the ball in the air...

math algebra
.075*10000 = .08x + .06(10000-x) x = 7500 ------ .075*10000 = .08*7500 + .06(10000-7500) .075*10000 = 600 + .06(2500) .075*10000 = 600 + 150 .075*10000 = 750 750$

geometry
A swimming pool is 3 ft deep in the shallow end the bottom of the pool has a steady downward drop of 12 degrees if the pool is 50 feet long how deep is the deepest end?

Physics
791.2

Physics
.05

Calc
thanks for the first part. i wanted something that was more step-by-step for the second one.

Calc
Evaluate the integral using any method: (Integral)sec^3x/tanx dx I started it out and got secx(1tan^2x)/tanx. I know I just have to continue simplifying and finding the integral, but I'm stuck on the next couple of steps. Also, I have another question witht he same ...

Chemistry
just get the molar mass and use multiplication by one, meaning it would be mol/1 x grams(from molar mass)/moles(1)of the compound.

physics
ya

Chemistry
What mass of Ca(OH) 2 is required to make 1.5 l of a 4.0% (w/v) solution of Ca(OH)2 in water?

Calculus
Find the volume of the solid generated by revolving the region bounded by the line y=5x+6 and the parabola y=x^2 about the following lines: a) the line x=6 b) the line x=-1 c)the x axis d) the line y=36 Thanks!

Chemistry
A 50.0 mL graduated cylinder has a mass of 67.6 g. When it is filled with an unknown liquid to the 38.8 mL mark, the cylinder and liquid combined have a mass of 119.4 g. Calculate the density of the liquid in g/cm3. (1 mL = 1 cm3.)

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