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November 26, 2014

Homework Help: Science

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Recent Science Questions

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Science
A uniform beam has a weight of 500N(acting at the centre of the beam). It also carries a point load of 1,2kN at the centre of the left half of the beam, and a point load of 820N at distance of one eighth of the beam's lenght from the right hand side. The support are at the...
Monday, November 3, 2014 at 10:16am

science
Jani is planning to go to Jojo's house, Jani has to walk 30m going east. Then, he will head to the north at a distance of 40 meters. Afterwards, he will walk 70m going west. 1. Determine the total distance travelled by Jani's. 2. Calculate Jani's displacement. 3. ...
Monday, November 3, 2014 at 10:11am

science
A non-electronic conductor is
Monday, November 3, 2014 at 9:48am

science
Which of the mineral does not contain oxygen?
Monday, November 3, 2014 at 9:46am

science
The best example of polyembryony is
Monday, November 3, 2014 at 9:44am

science
Which of these waves can be polarized ?
Monday, November 3, 2014 at 9:43am

science
If a wire of resistance R is melted and recast to half of its length then the new resistance of the wire will be
Monday, November 3, 2014 at 9:39am

Science
"What amount of Barium hydroxide is needed to neutralize 500 kg of 18 molar Sulphuric acid?"
Sunday, November 2, 2014 at 11:29pm

Computer Science / programming
Show the contents of each register and or memory location used after each instruction. MOV BH,33 BH=33 MOV [0500],BH BH=33, [0500]=33 MOV CL,66 CL=66 MOV [050],CL CL=66, [050]=66 MOV SI,0500 SI=0500 MOV BX,7643 BX=7643 ADD [SI],BX SI=0500, [0500]=76 ,[501]=DC INT 20
Sunday, November 2, 2014 at 9:36pm

Computer Science/ programming
How long (how many bytes) is the machine code (object code)? 1855:0100 BE0002 MOV SI,0200 1855:1030 BF0003 MOV DI,0300 1855:0106 B98000 MOV CX,0080 1855:0109 BA04 MOV AL,[SI] 1855:010B 8805 MOV DI],AL 1855:010D 46 INC SI 1855:010E 46 INC SI 1855:010F 47 INC DI 1855:0110 49 DEC...
Sunday, November 2, 2014 at 9:24pm

science
This year for my science fair project I will be testing to see if music affects a person's blood pressure. I will have a participant get relaxed (for 5 minutes). After he/she is relaxed, I will take his/her blood pressure with a digital sphygmomanometer (instrument used to...
Sunday, November 2, 2014 at 5:49pm

science
This year for my science fair project I will be testing to see if music affects a person's blood pressure. I will have a participant get relaxed (for 5 minutes). After he/she is relaxed, I will take his/her blood pressure with a digital sphygmomanometer (instrument used to...
Sunday, November 2, 2014 at 5:36pm

Science
demonstrate how the ear works
Sunday, November 2, 2014 at 4:37pm

science
how many grams of CO2 (g) are there in 82.0ml of the gas at 0.916 atm and 30 degrees ceksius
Sunday, November 2, 2014 at 1:25pm

science
I want to know whic n2 and co2 rms become same?
Sunday, November 2, 2014 at 6:06am

physical science
A gold bar has a mass of 250 grams and is heated from 25 degrees Celsius to 55 degrees Celsius. How much heat did the gold bar absorb? The specific heat of gold is 0.13J/g*degrees C.
Saturday, November 1, 2014 at 2:35pm

science
magnesium oxide reacts with phosphoric, H3PO4 TO PRODUCE MAGNESIUM PHOSPHATE AND WATER. HOW MANY GRAMS OF MAGNESIUM OXIDE ARE REQUIRED TO REACT COMPLETELY WITH 33.5G OF PHOSPORIC ACID?
Saturday, November 1, 2014 at 1:44pm

science
what is scorpius
Saturday, November 1, 2014 at 11:03am

Science
What is the term use to study the satellite television instruction experiment?
Saturday, November 1, 2014 at 8:17am

Science
What is chemic bonding?
Friday, October 31, 2014 at 1:05pm

Science Physics
A flat-bottom river barge is 30.0 ft wide, 85.0 ft long, and 15.0 ft deep. (a) How many ft3 of water will it displace while the top stays 3.00 ft above the water? (b) What load in tons will the barge contain under these conditions if the empty barge weighs 160 tons in dry dock?
Friday, October 31, 2014 at 12:28pm

venn diagram
venn diagram solving for 3 students likes geography physics science 75 likes only one subject 65 likes exactly two 15 like all three.1)how many students in a class 2)how many students like atleast one 3)how many students like only physics 4)how many students like only ...
Friday, October 31, 2014 at 3:21am

6th grade science
we had this question on a test the measure of the amount of SPACE occupied by an object is its: weight mass area volume I put volume and it was marked wrong. The teacher said it was mass. I looked it up and still think I am correct, can you tell me which is correct? Thanks
Thursday, October 30, 2014 at 8:22pm

science
Consider the compound cobalt (II) chloride hexahydrate (CoCl2·6H2O), how many waters of crystallization are present in this compound?
Thursday, October 30, 2014 at 8:10pm

science
what is the parts of a lily flower?
Thursday, October 30, 2014 at 6:00pm

Science asap!
Which of the following is not a process that forms metallic ore? placer deposits fossil compaction hydrothermal solutions igneous processes 5. Which of the following nonmetallic mineral resources is used both as a building material and as an industrial mineral? sulfur ...
Thursday, October 30, 2014 at 5:53pm

SCIENCE
20. A horticulturist wants to plant that produces flowers with a certain size color and fragrance but is not aware of any one plant having all of these traits. The quickest way she could achieve her goal would be to apply the process of .
Thursday, October 30, 2014 at 4:21pm

Science - Please Check Some Answers 1
Please help me with the following: A science class tested ways to clean water after an oil spill. Each group of students was given 100 mL of vegetable oil, 100 mL of engine oil, and 800 mL of water in a rectangular plastic container. Each container also held five floating ...
Thursday, October 30, 2014 at 3:04pm

science
Over time,a plant pollinated by a hummingbird has developed very long, tube like flowers.Why might the flower have adapted in this way?
Thursday, October 30, 2014 at 2:32pm

Science
What is the product of NaC2O4 and Ag+? A. NaC2O4 and Ag+ do not form a product. B. AgNaC2O4 C. Ag2C2O4****** I think the right answer is C...please let me know.
Thursday, October 30, 2014 at 10:38am

Science
What is the centripetal force on a vehicle rounding a circular curve with a radius of 80m at a constant speed of 90 km/h if the vehicles mass is 2,000 kg? (Hint: first express the velocity in meters per second) A: 20,250 N B: 703 N C: 625 N D: 15,625 N
Thursday, October 30, 2014 at 10:13am

Science
I was asked to give topic for science fair. Basically I want to have improvement in transportation. Please give me some ideas. Is there any area in transportation that is also having disadvantages means which area need to be improved so that it causes less problems to (...
Thursday, October 30, 2014 at 8:21am

science
3. One calorie is the energy required to raise one gram of water one degree Celsius. Since we use the joule as the standard measurement of energy, 1 calorie = 4.184 J. If a pot is placed on the stove with 2.4 liters of water at a temperature of 27°C, how many joules are ...
Thursday, October 30, 2014 at 2:13am

science
Fragment of Roman Gladiator leather harness. Radiocarbon date is 2100. What is the corrected age?
Thursday, October 30, 2014 at 12:34am

SCIENCE
The length of the platform is 1.5m and width is 0.750m,load acting on the platform is 150kg then what is the bottom support length and angle of it.
Wednesday, October 29, 2014 at 11:14pm

Science
What is the molarity (moles per liter) of a solution in which 80 grams of sodium hydroxide, NaOH, is dissolved in 1 liter of solution? How do I convert the 80grams into mols?
Wednesday, October 29, 2014 at 9:30pm

Science 1 easy question!!!!
Is a gazelle the closer to a camel or lioness on a cladogram? I think camel
Wednesday, October 29, 2014 at 9:09pm

Science
How is potential and kinetic energy measured?
Wednesday, October 29, 2014 at 5:39pm

Physical science
Think Critically. The mechanical advantage of a machine is less than one. Compare the distances over which the input and output forces are applied.
Wednesday, October 29, 2014 at 5:21pm

science
How do I do the following? Write the net ionic equation for the following molecular equation. 3 CoCl2(aq) + 2 Na3PO4(aq) Co3(PO4)2(s) + 6 NaCl(aq)
Wednesday, October 29, 2014 at 5:17pm

Science - Please Check My Written Answer
Please help me with the following: Briefly explain why experiments having faulty design or inconsistent data are problems for scientists. List several reasons. There are several reasons that experiments with faulty designs or with inconsistent data are problematic for ...
Wednesday, October 29, 2014 at 5:00pm

Science
Think about the factors that will influence the evolution of humans in the future. Name one factor that would exert influence through the process of natural selection and one factor that would exert influence through artificial selection. 1.natural selection: genetic ...
Wednesday, October 29, 2014 at 4:23pm

science
Multiple Choice 1. Which of the following terms refers to an object that orbits the sun and has enough gravity to be spherical but has not cleared the area of its orbit? (1 point) comet asteroid dwarf planet planet 2. Which of the following statements about the solar system&#...
Wednesday, October 29, 2014 at 4:19pm

science
the 6 term of a G.P is 2000 its common ratio is 10 find the first term?
Wednesday, October 29, 2014 at 4:18pm

Science
Did hippos evolve from whales or did whales evolve from hippos?
Wednesday, October 29, 2014 at 3:46pm

Science
When evolution was first proposed, which of the following was used as evidence to support the idea? 1.observations of nature 2.laboratory experiments 3.extensive fossil collections 4.genetic sequences I think its either 1 or 4
Wednesday, October 29, 2014 at 3:04pm

Science
Calculate the Volum ( In3 units) of a .740 lb object which has a densitiy of 1.326g/cm3 1 lb = 454 g 1 in = 2.54 cm
Wednesday, October 29, 2014 at 2:43pm

earth science
Which of the following statement is False: A.Cinder cones are built from ejected lava fragments and are usually less than 300 meters high B.Calderas are large collapsed depressions having more or less circular form C.Most volcanoes are fed magma through short conduits called ...
Wednesday, October 29, 2014 at 11:41am

Science
An object travles 10 m in 0.07s what is its speed?
Wednesday, October 29, 2014 at 9:17am

geography,maths literacy,life science,agriculture
What kinds of jobs for my subjects
Wednesday, October 29, 2014 at 2:26am

Science
Where does a clone recieve is DNA from? My guess is two parents
Tuesday, October 28, 2014 at 7:54pm

Science
How might genetically engineered crops help people in hash climates?
Tuesday, October 28, 2014 at 7:41pm

Science please help!!
To determine the atomic mass of an element, you would take a _________ average of the isotopes that make up that element
Tuesday, October 28, 2014 at 7:11pm

English
What do you have to do afer school? 1. I have to go to my academy and study hard until 11 p.m.. 2. I have to go to an academy to study math, English and science. 3. I have to go to the academy to study 5 subjects. 4. I have to wash clothes in the washing machine. 5. I have to ...
Tuesday, October 28, 2014 at 4:20pm

Science
According to the continental drift theory, which of the following land regions should show the greatest similarities in fossil types? (1 point) A) east coast of South America and west coast of Africa B) east coast of South and west coast of South America C) northern coast of ...
Tuesday, October 28, 2014 at 1:22pm

science
how did the discovery of the electron change the atomic model? A.it disproved the earlier idea of an indivisible atom. B. it confirmed that atoms are very tiny. C.it exposed fradulent experiments conducted by unqualified scientists. D. it proved that atoms are easier to see ...
Tuesday, October 28, 2014 at 12:18pm

computer science
I would like to create a class for finding the voltages of 1, 2 or even 4 batteries. The Class can be called BatteryVoltage with a default voltage value of 1.5 (AA Battery) Must allow the user to find the total voltage of batteries when installed as a single,double, or ...
Tuesday, October 28, 2014 at 7:56am

Social Science
I am confused, what is the difference between basic tribunal and war crime tribunal. Thank You
Monday, October 27, 2014 at 10:31pm

Science 10
Need examples of food for Chemistry Reactions 1. Synthesis 2. Decomposition 3.Single Replacement 3. Double Replacement So for synthesis ( A + B --> AB ) I did, Macaroni + Cheese --> Mac n Cheese For Decomposition ( AB --> A + B ) I did, Dough --> Wheat + Water ...
Monday, October 27, 2014 at 8:49pm

Science 10
Here are the results of the 3 trials of dissolving equal masses of marble in hydrochloric acid listed from fastest to the slowest. List concentration, surface area, and temperature in decreasing order of their important in increasing the rate of this reaction. Trial 1 = Dilute...
Monday, October 27, 2014 at 8:01pm

science
on the moon where g=1.62m/s2 would the pendulum clock on the moon run faster or slower
Monday, October 27, 2014 at 7:54pm

science
12. Convert 11.1 liters to centiliters. A. 1,110 centiliters B. 11,100 centiliters C. 111 centiliters D. 111,000 centiliters 13. Which of the following tasks should be performed before measuring the mass of any object on a triple-beam balance? A. Make sure that the balance pan...
Monday, October 27, 2014 at 7:50pm

science
4. Convert to centimeters: 6.8 meters A. 6,800 centimeters B. 68 centimeters C. 68,000 centimeters D. 680 centimeters 5. What is the difference between a theory and an opinion? A. A theory is supported by scientific evidence, while an opinion is not. B. An opinion is supported...
Monday, October 27, 2014 at 7:50pm

science
1. Tommy performed an experiment to test the solubility of sodium chloride in water. After he completed his experiment, he discovered that he had a few unused grams of NaCl leftover in a beaker. What should he do with the excess NaCl? A. Pour the excess back into the original ...
Monday, October 27, 2014 at 7:49pm

Science
occurs when the moon passes between the sun and the earth, and the shadow of the moon falls on earth.
Monday, October 27, 2014 at 7:13pm

Physics Science
(a) Find the total force on the bottom of a cylindrical gasoline storage tank 15.0 m high with radius 23.0 m. (b) Find the total force on the side of the tank.
Monday, October 27, 2014 at 6:30pm

Science Physics
A pile driver falls a distance of 1.75 m before hitting a pile. Find its velocity as it hits the pile. So its 1.75x9.80=17.15?
Monday, October 27, 2014 at 5:48pm

science
1. Tommy performed an experiment to test the solubility of sodium chloride in water. After he completed his experiment, he discovered that he had a few unused grams of NaCl leftover in a beaker. What should he do with the excess NaCl? A. Pour the excess back into the original...
Monday, October 27, 2014 at 5:32pm

science
1. Tommy performed an experiment to test the solubility of sodium chloride in water. After he completed his experiment, he discovered that he had a few unused grams of NaCl leftover in a beaker. What should he do with the excess NaCl? A. Pour the excess back into the original ...
Monday, October 27, 2014 at 5:00pm

Physical Science
A 5.00 kg block of ice at –25 oC is converted to steam at 125 oC. How much energy (in kilojoules) is expended in this process? The following data are provided: a. Specific heat of ice = 2.092 J/g oC b. Latent heat of fusion = 334.72 J/g c. Specific heat of water = 4.184 J...
Monday, October 27, 2014 at 4:44pm

science
which of the following is true about the magnetic field diagram below
Monday, October 27, 2014 at 4:41pm

Physical Science
Lead is a soft, dense metal with a specific heat of 0.117 J/goC, a melting point of 328.0 oC, and a heat of fusion of 23012 J/g. How much heat (in kilojoules) must be provided to melt a 350.0 kg sample of lead that is initially at 20 oC?
Monday, October 27, 2014 at 4:37pm

Physical Science
Jill walks 1 mile everyday for exercise, leaving her front porch at 9:00 A.M. and returning to her front porch at 9:25 A.M. What is the total displacement of Jill's walk?
Monday, October 27, 2014 at 3:50pm

science
'Imagine there is a tank of unknown gas that contains 53.31% carbon, 11.18% hydrogen, and 35.51% oxygen by mass. At 35.0 °C and 0.455 bar, 2.00 L of the gas has a mass of 3.20 g. Using this information, answer the following questions. a.) What is the empirical formula ...
Monday, October 27, 2014 at 2:41pm

Science 8A Electromagnetism
Hi, Umm, can someone give me an example because I'm kind of confused. I need help! Please help me! For this portfolio, you will design an experiment to investigate the relationship between the number of coil loops and a strength of a solenoid. Once you have an experimental...
Monday, October 27, 2014 at 12:56pm

Physical Science
A hockey puck moving at 28 m/s is caught by an 80.00 kg man who was at rest. The man and the puck move together after the collision. The pucks mass is 0.16 kg. What is the final velocity?
Monday, October 27, 2014 at 10:08am

science-gen chem
if 0.969 g of CaCl2 is mixed with 1.111 g of KlO3 how many grams of solid Ca(IO3)2 can theoretically be made? CaCl2(aq) + 2KlO3(aq) ===> 2Kcl(aq) + Ca(lO3)2 (s)
Monday, October 27, 2014 at 5:35am

PLEASE HELP! SCIENCE
The system of blocks shown in the diagram below is being accelerated to the right at 4.4 m/s2 What is the applied force Small box mass- 0.10 kg Big box mass - 0.20 kg Acceleration - 4.4 m/s2 Coefficient kinetic - 0.35
Sunday, October 26, 2014 at 8:48pm

Physics(Science)
Waves on a 5.0 m rope travel at a speed of 92 m/s. If the tension in the rope is 497 N, what is the mass of the rope?
Sunday, October 26, 2014 at 3:32pm

science (Need FAST FEEDBACK!!!)
Is a density bottle the same as a pycnometer?
Sunday, October 26, 2014 at 11:05am

Science
I have a solid dissolved in water, both the same temp, and when it's put in the temperature drops. I have the heat capacity it of the solution, and need to the molar heat of the solution of the solid that was dissolved. Right now I've got: Mass of water x heat capacity...
Saturday, October 25, 2014 at 9:59pm

Science HELP!
When diving into water, it is important to look before diving to avoid (blank)damage your nervous system. A. Deep water B. Underwater hazards C. living creatures D. Water toys Is the answer B? Thanks
Saturday, October 25, 2014 at 9:27pm

Science HELP!
The part of the brain that controls movement and balance is the A. Cerbrum B. Cerebellum C. Brain stem D. Frontal lobe Is the answer B? Thanks
Saturday, October 25, 2014 at 9:23pm

Science HELP!
The body's reaction to information is to send these to the brain. A. Neurons B. Impulses C. Dendrites D. Synapse Is the answer B? Thanks
Saturday, October 25, 2014 at 9:20pm

science
what is the different between escape velocity & orbital velocity ???
Saturday, October 25, 2014 at 9:09pm

science
How many grams of CaO must be added to 50.0 mL of water to make the temperature increase from 25.0 ¡ÆC to 48.81 ¡ÆC? The reaction is CaO(s) + H2O(l) ¡ê Ca(OH)2(aq) -- ¥ÄH = -83.7 kJ Assume the heat capacity of the solution is the ...
Saturday, October 25, 2014 at 9:04pm

science
Due to friction with the Earth's atmosphere, a large static electric charge could build up on our plummeting asteroid fragment. Would you expect our fragment to generate a magnetic field? Explain why or why not
Friday, October 24, 2014 at 7:00pm

Physical Science
Consider lead, in what state will it be at each of the following temperatures? a) 4000 degrees Celsius, b) 40 degrees Celsius, c) 400 degrees Celsius, d) 327 degrees Celsius.
Friday, October 24, 2014 at 4:05pm

science
How are Newton’s second and third laws of motion important to your everyday life?
Friday, October 24, 2014 at 3:33pm

science
a horticultural wants a plant that produces flowers with a certain size color and fragrance but it now aware of any one plant having all of these traits. the quickest way she could achieve her goal would be to apply the process of_____________
Friday, October 24, 2014 at 12:42pm

science
Can anyone help me out fill in the blanks. Here are the words that will complete the whole thing: -birth -body -control -development -eggs -endocrine glands -growth -hormones -milk -production -sperm uterus contractions The pituitary gland secretes______ which____ other____ ...
Friday, October 24, 2014 at 12:10pm

science
a ladder is at rest with its upper end against a wall and the lower end on the ground .Is the ladder more likely to slip,when a man stands on it at the bottom or at the top?gove reason.
Thursday, October 23, 2014 at 11:37pm

Science
A straight line with a positive slope on a velocity-time graph indicates which of the following? no movement constant acceleration toward the reference constant velocity away from the reference constant acceleration away from the reference
Thursday, October 23, 2014 at 9:25pm

SCIENCE FOR 7TH GRADE
i need to conduct a scientific investigation and i need some ideas. Ex. " how does the amount of sunlight affect a plants growth" I need something like what is listed above. Thank you
Thursday, October 23, 2014 at 6:07pm

science
is this an example of potential energy with household item? t.v
Thursday, October 23, 2014 at 4:16pm

science
how do the instincts of migration and hibernation help animals to survive
Thursday, October 23, 2014 at 4:13pm

science
what is kinetic energy and potential energy? Can u give me an example. thank you.
Thursday, October 23, 2014 at 4:01pm

science!!
A couple has just learned that their daughter has hemophilia. They already have a son who does not have the disease. What are the genotypes of the couple? Explain your reasoning. ---------------- The gene for hemophilia is sex-linked, a recessive on the X-chromosome. The ...
Thursday, October 23, 2014 at 3:55pm

Science
A cell starts with 12 chromosomes, then goes through mitosis. How many cells are produced at the end of mitosis? How many chromosomes are in each of the cells at the end of mitoses? A cell starts with 12 chromosomes, then goes through meiosis. How many cells are produced at ...
Thursday, October 23, 2014 at 3:00pm

Int.science
An inverse relationship can be represented by: a straight line a bar chart
Thursday, October 23, 2014 at 2:23pm

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