Posts by Dulce

Total # Posts: 91

math
at 8 am Dylan and his neighbor drove their cars to a city that was 240 mi. away from their neighborhood. when Dylan reached the city mickey had 40 mi. to go. he finally completed his trip48 minutes later

Physics
a container weighing a 1.20 x 10^4 N sits on a hydraulic press piston with can area of 0.80m^2. Compressed ir exerts a force of on the second piston which has an area of 0.30m^2 How large must this force be to support the car

Physics
joel is running down the newly waxed school corridor and tries to slide across the floor in this rubber shoes. The thick 1.5-cm thick rubber soles each have a cross-sectional area of 0.015m^2 and are sheared with a force of 10,000 N

Physics
A 20,000 kg vehicle is running at 80km/hr in a rotonda with a radius of curvature 25m compute for the centripetal force

Physics
A train whose speed is 100km/hr rounds a curve whose radius of curvature is 150m what is the acceleration?

physics
what is the centripetal force of the train in the previous problem whose speed is 27.8 m/s rounding a curve whose radius of curvature is 150m if the train mass is 8000 kg

MATH
If P(x)=x^3 -3x^2 + 4 then P (-1)

math
if P(x) = x^3 -3x^2 +4 then P(1)

math
evaluate the following polynomials -2x^2 + 5x -10 x=4

math
evaluate the following polynomials 1. 3x^2 -2x +5 x = -2

math
you download 12 new songs on your MP3 player. Write each amount as an integer

Physics
a ball dropped from rest bag by a little boy from window of a three storey apartment how far has it fallen fter 3s What is the ball's velocity after 4 second of fall How far does ball fall during the lst 4 second?

PHYSICS
did the sign * is for multplication?

PHYSICS
dETERMINE the horizontal force needed to accelerate a 50 kg grocery cart from rest to 0.90 m/s in 2.8s if the coefficient of friction between the cart and the floor is 0.20?

pHYSICS`
dETERMINE THE HORIZONTAL FORCE needed to accelerate a 50kg grocery cart from rest to 0.90 m/s in 2.8s if the coefficient of friction between the cart and the floor is 0.20 ?

English/ Help
The movie star caused a kerfuffle at the mall as shoppers quickly gathered around to get a better look and take pictures. Which of the following is the meaning of "kerfuffle" as used in the sentence above? A. A misunderstanding B. A commotion C. A withdrawal D. A ...

English/ Help
Which of the following sentences is written correctly? A When properly designed, an automobile can achieve great fuel efficiency. B. When properly designed an automobile can achieve great fuel efficiency. C. When properly designed, great fuel efficiency can be achieved by an ...

English/ Help
B!!!!!

English/ Help
In the race for student body government, both students were coequal. Their speeches each pointed to their records of service and academic excellence. Which of the following options is the meaning of "coequal" as used in the sentence above? A. The students gave ...

English/ Help
. Which of the following sentences is written correctly? A When properly designed, an automobile can achieve great fuel efficiency. B. When properly designed an automobile can achieve great fuel efficiency. C. When properly designed, great fuel efficiency can be achieved by an...

English/ Help
Which of the following phrases is misplaced in the sentence above? A. Extending her arms over the left-field wall B. toward the fan C. on the fly D. before displaying the home run ball for all to see I think D

English/ Help
misplace in the sentences

English/ Help
The doctor who was late for an appointment drooped x-ray into puddle hurrying to the hospital. a into the puddle b hurrying to the hospital c Who was late d for an appointment I think D

English/ Help
Which of the following sentences is an example of second person narrative voice? A. You became lost in a labyrinth of lies and deceptions. B. It was a labyrinth of lies and deceptions in which she was lost. C. He was lost in a labyrinth of lies and deceptions. D. I became lost...

English/ Help
It was a perfect day for a boat ride on a lovely river.? Which of the following parts of speech is the word "lovely" in the sentence above? A. Coordinating conjunction B. Prepositional object C. Adjective D. Adverb I think A

Science
A researcher is studying the rate of chemical reactions within living blood cells. When placing the cells into a petri dish with a pH of 2.5, the researcher should predict that the rate of the reactions will A. increase immediately. B. decrease immediately. C. remain the same...

Biology/Help
Which of the following is the purpose of the waxy substance that builds up in the ear canal? A. Insulating the ear canal B. Trapping and removing debris C. Promoting sound conduction D. Cushioning and stabilizing the pinna I thinks it is B

Science
In pea plants, the allele for tall (T) is dominant to the allele for short (t). Which of the following is the percent of offspring that will be tall if a heterozygous plant (Tt) is crossed with a homozygous tall plant? A. 100% B. 75% c. 50% D. 25% B?

Science
. A researcher wants to develop a new pharmaceutical compound to treat pain. Which of the following strategies will likely be the most effective process? A. Test extracts from newly discovered plants for pain-killing substances. B. Read anthropological studies to discover ...

math/help
a)4 1/6 divided 1 1/6 b)4 2/9 + 3 3/1

English/ Help
Choose the sentence that does not include a usage error. A) Today’s college students may have grown up in the age of music sampling and file-sharing; however, they should realize that cutting and pasting sentences from a Wikipedia article constitutes plagiarism. B) Today...

English/ Help
Choose the sentence that does not include a usage error. A) Because the student did not see any author information on the website, he incorrectly implied that he did not need to credit the source in his assignment. B) Because the student did not see any author information on ...

English/ Help
Choose the sentence that does not include a usage error. A) In his article, the author implies that plagiarism is more prevalent among today’s generation of college students than it was among previous generations. B) In his article, the author infers that plagiarism is ...

math/help
Find the measure of the supplement of a 22 angle.

Science
. A researcher wants to develop a new pharmaceutical compound to treat pain. Which of the following strategies will likely be the most effective process? A. Test extracts from newly discovered plants for pain-killing substances. B. Read anthropological studies to discover ...

Science
Fitness is a result of which of the following factors? A. Overproduction B. Adaptation C. Variability D. Homology I think it is B

English
when one assumes that when one event follows another in time, that the first event causes the second to occur,he or she may relying, on what? causation or reverse chronological order I really do not know

english Help
Many... Thank you!!

english Help
the search for answers to cause and effect can result in _____ explanations(s) A. two B. many C.one D.no I think it is A

English Need help
how many other modes of writing should be used to develop your definition? A.As many as you need B.one C.two D.three

Science
Fitness is a result of which of the following factors? A. Overproduction B. Adaptation C. Variability D. Homology I think it is B. not sure

Science
A researcher collects high-resolution photographs of the Earth taken from outer space at annual intervals for the last decade. This data would be most useful to analyze which of the following? A. Human movement during crises B. Migration patterns of large whales C. ...

Science
Experiments cannot validate hypotheses, only falsify them. The statement above can be restated in which of the following ways? A. Until disproved, an explanation for an observation is valid. B. Certain concepts cannot be subjected to direct experimentation. C. A hypothesis ...

Science
Thank you!!!

Science
B that's the answer

Science
I think is D. I am not sure.

Science
A test is performed to see if applying fertilizer to rose bushes increases the number of flowers on bushes. Which of the following best relates to the hypothesis for this experiment? A. Watering all of the rose bushes the same amount throughout the experiment B. Predicting ...

Biology
Which of the following is the balanced equation for photosynthesis in plant cells? A 3C0+ 3H0 + Energy --)-CH120 + 30 2 266 2 B. 6C0+ 6Hp + Energy--)-CHp + 60 2 616 2 C. CH0 + 30--)-3C0+ 3H0 + Energy 6126 2 2 2 D. CHp + 60--)-6C0+ 6Hp + Energy 616 2 2 I really do not know

Biology
. Which of the following parts of the circulatory system carries oxygenated blood? A An artery moving blood from the heart to the lungs B. A vein moving blood to the heart from the body C. An artery moving blood from the heart to a muscle cell D. A venule moving blood to the ...

Science
A student is assigned the task of measuring the mass of one tennis ball using a scale for which the zero adjustment on the balance is not working. The student is given three balls and the can in which they were packaged. Which of the following strategies will provide the best ...

Chemistry
At the instant that an elastic falling object strikes the ground and becomes compressed, which of the following energy transformations occurs? A. Gravitational to electric B. Potential to kinetic C. Electric to gravitational D. Kinetic to potential I think it is D.

Grammar
I have this question: Either one of them HAS? or Either one of them HAVE?

Biology
. The covalent bonds between the monomers of an enzyme macromolecule are A. glycosidic bonds. B. peptide bonds. C. phosphodiester bonds. D. ester bonds. I thimk it is B

Biology
. Which of the following is the term given to the sequence of nucleotides that contains the information to make a specific protein molecule? A. Promoter B. Gene C. Operator D. Locus I thinh it is B.

Chemistry
Three liquids of differing densities are studied. Samples of liquid 1 and liquid 2 are placed in a container together. Liquid 1 rises to the top. Another sample of liquid 1 is placed in a different container together with liquid 3. This time, liquid 3 rises to the top. If all ...

Science
Two students collect information about the number of dandelions in a park. Based on their sampling, they estimate that there are 900 dandelions in the 300-square-meter city park. To determine the accuracy of their estimate, which of the following questions is necessary? A. ...

Science
. A population shows the following annual data: 3% emigration 2% immigration 2% births 1% deaths Which of the following is the change in population at the end of the year? A. 3% decrease B. 2% increase C. 1% decrease D. No change I think it is not change.

Chemistry
NaOH + HS0-+ Hp + NaS0 24 24 Which of the following is the number of moles of NaOH required to neutralize 1 mole of H2S04 in the equation above? (Note: The reaction is not balanced.) A. 0.5 moles B. 1 mole C. 1.5 moles D. 2 moles 1

Biology
Which of the following terms describes changes in allele frequencies in the gene pool over a single generation? A. Macroevolution B. Microevolution C. Segregation D. Speciation

Science
An experienced mountaineer decides to climb Mount Everest using the same route in the same season and with similar materials and equipment used by a fatal1924 expedition. The scientific purpose of such a climb would be to A. show that modern technology makes climbing safer. B...

Science
my answer is C

Science
In developing countries, which of the following factors correlates with high birth rates? A. Increased availability of contraception B. Increased education and standard of living C. High infant mortality rate D. High availability of postnatal care

chemistry
. A student wants to design an experiment to demonstrate the effects of acid rain on plant life. Which of the following substances should be combined with water to best simulate acid rain? A. Vinegar B. Table salt C. Baking soda D. Ammonia

Biology
. Which of the following is an appropriate description of the arrangement of the cell membrane? A. Fluid phospholipid bilayer containing embedded proteins B. Rigid carbohydrate bilayer containing embedded phospholipids C. Rigid layer of phospholipids with proteins on the outer...

Science
A researcher wants to develop a new pharmaceutical compound to treat pain. Which of the following strategies will likely be the most effective process? A. Test extracts from newly discovered plants for pain-killing substances. B. Read anthropological studies to discover plants...

Science
Which of the following procedures is an appropriate negative control for testing the hypothesis that air contains bread mold spores? A. Seal slices of bread in a container to minimize air contact. B. Place slices of bread in a refrigerated environment. C. Add ingredients to ...

Science
A cylinder and an airtight piston are used in the following experiment. The piston is pushed up and down in the cylinder and the resulting pressure of the air inside the cylinder is measured with a pressure gauge. The results of the experiment are recorded in the following ...

math
An employee at a marketing firm A student uses approximately 40 to 45 gallons of gasoline per month. The cost of gasoline varies between $2.96 and $3.61 per gallon. Which of the following is a reasonable estimate of the student's weekly gasoline expense? A. $15 B.$30 c. $...

physic
how become 6.38*10^6? given is 6.337 x10^6?

physic
can u teach me how to solve damon?

physic
FOR MARS PLEASE

physic
Find the force a 67.5 kg man would experience while standing in the surface of each of the following planets PLANET 1. EARTH 2. MARS 3. PLUTO Mass for earth 5.98 x 10^24 kg for mars 6.34 x 10 ^23 kg for pluto 5 x 10^23 kg distance distance for planet 6.337 x 10^6 m distance ...

Physics
i didn't gets how to solve this one can u help me

Physics
WHAT?

Physics
if the mass of two balls is 0.300 kg each then what is the gravitational force between them if the distance is 0.3000 m

physics
The net external force on a cart is N north. If the cart has a total mass of 220 kg, What are the magnitude and direction of its acceleration?

PHYSICS
@damon is that the answer in my table?

PHYSICS
he following data were obtained for the position of a ball as it rolled along a straight track DISPLACEMENT (CM) 2.90 7.40 11.00 22.70 31.10 TIME 0.60 2.10 3.30 7.20 10.00

PHYSICS
the following data were obtained for the position of a ball as it rolled along a straight track DISPLACEMENT (CM) TIME 2.90 0.60 7.40 2.10 11.00 3.30 22.70 7.20 31.10 10.00

PHYSICS
an ant walks 22 cm in a northerly directions turns and walks southeasterly (45 degree East Of South) a distance of 47 cm what is a resultant displacement?

PHYSICS
i didn't gets how to solve

PHYSICS
an ant walks 22 cm in a northerly directions turns and walks southeasterly (45 degree East Of South) a distance of 47 cm what is a resultant displacement?

PHYSICS
a motorcycle is driven 50 km west then 30 km south and 25 km 30 degree west of south show the vector diagram find the total displacement of motorcycle

math
64 and 19

physics
A toy rocket is shot vertically from the base of a multiple level parking garage. the rockets height in feet is modeled by the equation h(T)= -16T squared+ 128 T, where T is the time in seconds if the rocket just reaches the top of the parking garage, how high is the parking ...

college chem
I think the limiting agent is sodium sulfate... and the mass of sodium sulfide is 8.268 grams

math
The python snake climbed 10 feet up a 12 foot tree and the boa constrictor snake climbed 16 feet up an 18 foot tree. Write the fraction of the tree each snake climbed. Simplify the fraction and compare the distances

AP Chemistry
bobpursley you jerk! 4 was the answer!

science
Snow

5th Grade Math
i have no clue

OCEANOGRAPHY HELP
how is living in a fast monving strean like living along the seashore