Thursday
October 2, 2014

Posts by Me


Total # Posts: 1,053

Physics
57
September 30, 2014

Chemistry II
Dr.Bob222 please help given the following table of thermodynamic data substance delta HofF S PCl3 -288.07 kJ/mol 311.7 J/mol-k PCl3 -319.6 kJ/mol 217 J/mol- k determine the normal boiling point (C)of PCl3
September 29, 2014

Math
the lcm of two numbers is 60 and one of the numbers is 7 less than the other number, what are the numbers?
September 9, 2014

Chemistry
How many chemical reactions are possible regarding the formation of carbonic acid and the dissolving of calcite? A. 23 B. 10 C. 2 [D.] 3 ?
September 5, 2014

Physics
I got two answers. Using d=148.7, df=30.1, Vi=10m/s First I got 26.73s, then I got 48.49s not sure wich is right...if any
September 3, 2014

Physics
bobpursley, I did not understand your explanation :( Could you please help? Thank you!!
September 3, 2014

geo
A line contains the points (8, 9) and (–12, –7). Using point-slope form, write the equation of the line that is parallel to the given line and that passes through (–5, –15).
August 7, 2014

Geometry
.11764?
August 7, 2014

Geometry
What is the probability of drawing three red cards, one at a time without replacement, from a standard deck of 52 cards?
August 7, 2014

science (check please (:)
thank you
June 13, 2014

science (check please (:)
Luther Burbank was a plant breeder who developed a strain of potato plant that produced more tubers (the part of the root that people eat) of larger size than other potato plants that were grown on farms at the time. This strain of potato was also resistant to the potato ...
June 13, 2014

science (CHECK plz)
How did Lamarck and Darwin differ in their thinking about species? A. Darwin thought that organisms could induce their own changes, while Lamarck thought that change could only be induced by an organism's environment. B. Darwin thought that change could occur in individual...
June 13, 2014

science (check plz)
1)When evolution was first proposed, which of the following was used as evidence to support the idea? A)observations of nature B)laboratory experiments C)extensive fossil collections*** D)genetic sequences
June 12, 2014

science (check please (:)
haha thank you Ms.Sue
June 12, 2014

science (check please (:)
oh i see, so its C
June 12, 2014

science (check please (:)
sorry i dont get it
June 12, 2014

science (check please (:)
A?
June 12, 2014

science (check please (:)
suppose a species od flowering plant produces primarily blue flowers but also some very pale blue (almost white) flowers the blue color attracts pollinators but the white color does not herbivores feed on this plant and locate it by its blue flower color the white flower color...
June 12, 2014

social studies (check plz)
thank you
June 12, 2014

social studies (check plz)
(which of the following is not part of part of the theory of evolution?) a organisms tend to produce more offspring than can survive to reproductive age*****? b organisms can acquire changes during their lifetime that can help their species survive. c organisms that do not ...
June 12, 2014

science (help)
What environmental pressures in the past do you think were most important in shaping the human species as it exists today?
June 12, 2014

math check
you and 5 friends go to a concert in how many different ways can you sit in the assigned seats? . . . . . . . . . . . A.720***? . B.120 . C.30 . D.15 (dont remember if i had posted this)
June 11, 2014

math (cant figure it out)
you own 7 pairs of jeans and want to take 2 of them with you on vacation. In how many ways can you choose 2 pairs of jeans? . . . . . . . . . . . A.60 . B.21**? . C.20 . D.10
June 11, 2014

Math (check answer plz)
thank you!
June 11, 2014

Math (check answer plz)
simplify 9C4! . . . . . . . . . . . . . . . . . . . . . . A. 126 . B. 15,120 . C. 5 . D. 3,024******
June 11, 2014

english
for vague pronouns what is correct. when the car hit a tree, it made a terrible noise or the care made a terrible noise as it crashed into a tree?
June 11, 2014

math (check answer plz)
thank you for checking!
June 11, 2014

math (check answer plz)
simplify 8P3! . . . . . . . . . . . . . . . . A. 42 . B. 336********? . C.40,432 . D.56
June 11, 2014

math *check* (PERMUTATION)
thank you again :)
June 11, 2014

math *check* (PERMUTATION)
simplify 3! . . . . . . . . A.2 B.5 C.3 D.6*************?
June 11, 2014

math (check answer plz)
thank you Chelle :)!
June 11, 2014

math (check answer plz)
The probability of a certain hockey player making a goal after hitting a slap shot is 1/5 how many successful slap shots would you expect her to make after 120 attempts? . . . . . . . . . . . . . My answer: 24
June 11, 2014

Math (check answer plz)
thank you :)
June 11, 2014

Math (check answer plz)
13. A true-false test has 12 questions. What is the probability of guessing the correct answers to all of the questions? (1 point) A: 1 over 4096*******? B: 1 over 144 C: 1 over 24 D: 1 over 14
June 11, 2014

math *check*
thank you!
June 11, 2014

math *check*
11. A basket contains the following pieces of fruit: 3 apples, 2 oranges, 2 bananas, 2 pears, and 5 peaches. Jonas picks a fruit at random and does not replace it. Then Beth picks a fruit at random. What is the probability that Jonas gets a peach and Beth gets an apple? A: ...
June 11, 2014

math (please check answer)
10. You have six $1 bills, eight $5 bills, two $10 bills , and four $20 bills in your wallet. You select a bill at random. Without replacing the bill, you choose a second bill. What is P($1, then $10)? A. 77/190 B. 3/100 C. 3/95*****? D. 2/5
June 11, 2014

math (cant figure it out)
A spinner is divided equally into six parts with the letters F,G,E,I,Q,O. If you spin the spinner twice, what is P(vowel, then Q)? A. 1/10****? B. 1/9 C. 2/9 D. 1/12.
June 10, 2014

math *check*
haha sorry and thank you i had figured it out but couldnt guess 2 times :)
June 10, 2014

math *check*
oops i mean A
June 10, 2014

math *check*
8. Each of two urns contains green balls and red balls. Urn one contains 8 green balls and 12 red balls. Urn two contains 5 green balls and 8 red balls. If a ball is drawn from each urn, what is P(red and red)? A. 79/65 B. 24/65 C. 20/33******? D. 2/13
June 10, 2014

math (check answer plz)
ohhhh i get it! thank you!!
June 10, 2014

math (check answer plz)
7. A bag containing 4 green marbles, 6 red marbles, 14 orange marbles, 5 brown marbles, and 8 blue marbles. You choose a marble, replace it, and choose again. What is P(red, then blue)? A. 48/1369 B. 14/1369 C. 27/37 D. 14/37***?
June 10, 2014

math (please check answer)
thank you!
June 10, 2014

math (please check answer)
6. Food Express is running a special promotion in which customers can win a free gallon of milk with their food purchase if there is a star on their receipt. So far, 147 of the first 156 customers have not received a star on their receipts. What is experimental probability of...
June 10, 2014

math *check*
thank you!
June 10, 2014

math *check*
A bag contains 9 green marbles and 11 white marbles. You select a marble at random. What are the odds in favor of picking a green marble? A. 9:20 B. 2:9 C. 11:9 D. 9:11***?
June 10, 2014

math (cant figure it out)
thank you and i had asked my teacher and she said it was scheuled to be updated since the question was wrong.
June 10, 2014

math (cant figure it out)
4. A spinner is divided into 10 equal sections numbered from 0-10. You spin the spinner once. What is P(not even)? A. 3/5 B. 1/2 C. 5/11 D. 6/11 (I DONT GET THIS)
June 10, 2014

math (cant figure it out)
3. A number cube is rolled 120 times. The number 4 comes up 47 times. What is the experimental probability of rolling a 4? What is the theoretical probability of rolling a 4? A. 47/120; 1/30*****? B. 47/120; 1/6 C. 4/47; 1/6 D. 1/6; 47/120
June 10, 2014

math (check answer plz)
thank you for correcting me!
June 9, 2014

math (check answer plz)
2. A jar contains blue, red, yellow, and green marbles. P(blue)=1/4. What type of probability is illustrated and why? A. Experimental; the result is based on the number of possible outcomes. B. Experimental; the result is found by repeating an experiment. C. Theoretical; the ...
June 9, 2014

math *check*
1. You roll a number cube numbered one to six 12 times. P(5)=2/3. What type of probability is illustrated and why? A. Experimental; the result is based on the number of possible outcomes. B. Experimental; the result is found by repeating an experiment. C. Theoretical; the ...
June 9, 2014

Physics
A train on a mountain railway is carrying 200 people of average mass 70kg up a slope at an angle of 30° to the horizontal and at a speed of 6.0 m s–1. The train itself has a mass of 80 000 kg. The percentage of the power from the engine which is used to raise the ...
June 8, 2014

fixed question (science check plz)
A portion of the amino acid sequence of an enzyme from a worm is shown below. -Q-Q-Q-N-N-N-C-C Analyze the same portion of the same enzyme taken from several other organisms. Place them in order from most closely related to the worm most distantly related to the worm. -Q-R-Q-N...
June 3, 2014

science (help)
A portion of the amino acid sequence of an enzyme from a worm is shown below. -Q-Q-Q-N-N-N-C-C Analyze the same portion of the same enzyme taken from several other organisms. Place them in order from most closely related to the worm most distantly related to the worm. -Q-R-Q-N...
June 3, 2014

science (help)
a portion of amino acid sequence of an enzyme froma worm is shown below -Q-Q-Q-N-N-N-C-C analyze the same portion of the same enzyme taken from several other organisms place them is order from most closely related to the worm to the most distantly related to the worm...
June 3, 2014

science (check!)
Which experimental approach would be most effective and easiest to clearly determine the evolutionary relationship between the starfish and green snake? a. sequence the same gene in both species to compare their similarity. b. dissect specimens of both species to look for ...
June 3, 2014

Physics
A wind turbine has blades that sweep an area of 2000m2. It converts the power available in the wind to electrical power with an efficiency of 50%. What is the electrical power generated if the wind speed is 10ms–1? (The density of air is 1.3 kg m–3.)
June 3, 2014

science (check!)
A biologist made population counts of four different species of animals in an ecosystem. What can you infer from these numbers about possible predator-prey relationships between the species? Species A:155 Species B:17 Species C:2467 Species D:19 A.Species A could be a predator...
May 27, 2014

science
8.two species have a relationship with one another in an ecosystem. suppose one of these two species goes extinct. which type of relationship did the two have if the surviving species population increases after the other goes extinct? A.the extinct species was a parasite in a ...
May 27, 2014

science (CHECK plz)
8.two species have a relationship with one another in an ecosystem. suppose one of these two species goes extinct. which type of relationship did the two have if the surviving species population increases after the other goes extinct? A.the extinct species was a parasite in a ...
May 26, 2014

science (check plz)
thank you,and for 4. could it be b?
May 26, 2014

science (check plz)
3.A nonnative species of animal is introduced into A healthy ecosystem.In its new environment, this species has no predators, although it preys on several native animals in the ecosystem.Make a prediction about the biodiversity and health of this ecosystem in the future. A....
May 26, 2014

science (check!)
2.A biologist studying a desert ecosystem observes that the population of a lizard species increases following a particulary hot, dry period that causes a snake population to decline what could the biologist hypothesize bout the roles of these two species? A.the lizard preys ...
May 26, 2014

other science checkkk
C?
May 26, 2014

other science checkkk
1.Which of the following could be true of two different species that have a competitive relationship in the same ecosystem? A.One species preys on the other***. B.The relationship is mutually beneficial. C.They share the same niche. D.One species benefits, while the other is ...
May 26, 2014

last science check
haha thank youuu!
May 26, 2014

last science check
A** i mean
May 26, 2014

last science check
6. Which of the following pairs of words correctly completes the blanks in the sentence below? Depletion of_____ has been halted by a ban on the manufacturing of____ .. the ozone layer, chlorofluorocarbons. acid rain, carbon dioxide. fossil fuels, gasoline. global warming, ...
May 26, 2014

science (check plz)
thank you again (:
May 26, 2014

science (check plz)
7. Which of the following is a form of pollution triggered by formation of a gas, and can have dramatic effects on the health of a coral reef ecosystem? fog pesticides acid rain** oil spill
May 26, 2014

science (check!)
thank you, and for 5 i have A and C on my mind, but i dont know.
May 26, 2014

science (check!)
4. Use of which of the following does not contribute carbon dioxide to the environment? refrigerator charcoal grill computer bicycle*** --------------- 5. Why does buying food that is grown in your local area help prevent loss of biodiversity? Local plants and animals are less...
May 26, 2014

science (check!)
2. A salamander is a keystone species in a forest ecosystem with high biodiversity. This species migrates from woodland areas to a local stream to reproduce. If a road is built that cuts off the woodland areas from the stream, what effect will this have on the forest ecosystem...
May 26, 2014

science (check!)
1. Which of the following statements is true? Biodiversity provides additional resources that raise the carrying capacity of an ecosystem. Biodiversity increases an ecosystem’s ability to withstand changes*** Biodiversity makes an ecosystem more difficult to destroy. ...
May 26, 2014

science (check!)
thank you (:
May 26, 2014

science (check!)
3. Which of the following determines the carrying capacity of a particular population by an ecosystem? keystone species pioneer species limiting factors renewable resources***
May 26, 2014

BIOLOGY please help
The first phase of somatic cell division is (A) __________, when the cell’s chromosomes condense, and the nuclear envelope that holds the chromosomes starts to break up. During this time, structures called the (B) __________ form from centrioles, which will attach to the ...
May 21, 2014

language arts check
The word simulation originally refers to the act of imitating. What meaning of the word is used in this excerpt from "What Makes Teens Tick?" "In an experiment using a driving-simulation game, he studied teens and adults as they decided whether to run a yellow ...
May 21, 2014

Biology
During exercise, (B) __________ muscles in the walls of the veins contract and cause the vein walls to stiffen so more blood flows to the heart and lungs.
May 21, 2014

language arts check
4. The Latin word alius means "other." Which of the following words contains this root? alien alight alike** alignment
May 21, 2014

language arts check
oops it was b
May 19, 2014

language arts check
In the sentence "How could anyone get Elbures out of that orchestra of sound?" what does the orchestra refer to? ------------ a musical group played at Immigration the Spanish pronunciation of Alvarez the name Elbures the American pronunciation of Alvarez***
May 19, 2014

language arts check
thank you!
May 19, 2014

language arts check
I was thinking simile too
May 19, 2014

language arts check
the poet uses all of the following in Annabel lee except? ANS: repetition
May 19, 2014

biology help
The fertilized egg undergoes cell divisions that form a ball of cells during (A)__________. During (B)__________, the endoderm, ectoderm, and mesoderm form. All the tissues of the adult body will come from these three germ layers. Differentiation is the process where cells are...
May 19, 2014

metric unit
oatmeal 8oz how many servings in a 5lb bag
May 13, 2014

metric unit
a boulder is 48567 kg what is the mass of the boulder in metric tons
May 13, 2014

customary unit
the perimeter of jareds property is 56 yards. how many feet is that of fence
May 13, 2014

world regional geography
that's wrong Mike, I just took the test and got that answer wrong :(
May 8, 2014

Help math only 1 question easy!
thanks!
May 5, 2014

Help math only 1 question easy!
Simplify 3!
May 5, 2014

science
yup its A
May 5, 2014

Math (check)
4. A spinner is divided into 10 equal sections numbered from 1 to 10. You spin the spinner once. Find P(not even). A. 1/3 B. 1/2 C. 1/5*****? D. 1/4
May 4, 2014

Math (check)
nvm i know
May 3, 2014

Math (check)
Which of the following is an example of a dependent event? 1 flipping two coins 2 rolling a number cube and spinning a spinner 3 choosing two scoops of ice cream 4 choosing a cookie at random, eating it, and then choosing another at random****?
May 3, 2014

math check probability
5/6*
May 3, 2014

math check probability
5?
May 3, 2014

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