Saturday
May 28, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

science
If 10gram of sugar is added to one third of 100 gram of 27%aqueous solution of sugar then concentration is..?
Monday, October 26, 2015 by rajnish

science
Explain the difference interactions that can take place when the beam of light hits the glass tank and then enters the water. Why does the beam lof light change direction when it enters the water? I need a full response/ explanation. It would really help me out thanks
Monday, October 26, 2015 by anonymous

PLEASE HELP MS. SUE HELP ME WITH THIS SCIENCE
2. Which of the following describes the genotype and phenotype of parents whose child will definitely have a recessive trait? A. Both parents have a homozygous for the recessive allele and have that trait** B. Both parents have a homozygous for the recessive allele but do not ...
Monday, October 26, 2015 by Priscilla

Science
2. Which of the following describes the genotype and phenotype of parents whose child will definitely have a recessive trait? A. Both parents have a homozygous for the recessive allele and have that trait** B. Both parents have a homozygous for the recessive allele but do not ...
Monday, October 26, 2015 by Priscilla

Science
what is the required amount of con hcl needed to prepare 100ml of w/v dilute Hcl? strenth of Hcl 36.5 w/w and is specific gravity is 1.17
Monday, October 26, 2015 by M hari Dhas

science
how does a stars life begin?
Monday, October 26, 2015 by Cami

SCIENCE HELP PLEASE
1.Why can certain stars sometimes be identified as eclipsing binary stars? A. They are brighter than any single star. B. They are all white dwarfs C. They become dimmer at regular intervals*** D. They are cool red stars. 2. Which of the following is a major difference between ...
Monday, October 26, 2015 by Anonymous

science
2.007 sec. for a pebble released from the top of the building to reached the ground. How tall is the building
Monday, October 26, 2015 by anilyn dolendo

science
A building ball falls freely from rest on planet where gravity is equal to 5m/sec².How far does it fall after 4 secz.
Monday, October 26, 2015 by lorene

science '
a book with an area of 0.0800 m/2 and a weight of 1.00 n is lying on the table . find the pressure on the surface of the table caused by the weight of the book.
Monday, October 26, 2015 by Anonymous

science/physics
just trying to find out what temperature the water in my celcius heating system needs to be to achieve an air tempature of 68 degrees ferinheidt
Monday, October 26, 2015 by Anna

Social Studies
What was the classical period of Greece and what were some of the achievements in art, science, and philosophy made during this period? I'm not sure what to write for this so HEEEELLLPPPP ME!!
Sunday, October 25, 2015 by Wifi

SOCIAL STUDIES!!
1. Why were Italian trade centers important? 2. What was the classical period of Greece and what were some of the achievements in art, science, and philosophy made during this period?
Sunday, October 25, 2015 by Hazel

science
how does cycling of matter occur in earths mantle?
Sunday, October 25, 2015 by pankakes

Science/English
According to Al Gore in An Inconvenient Truth, how is wind power beneficial in the fight against global warming? a.) it uses wind panels to trap the power of the wind b.) it emits water vapor, which cools the atmosphere c.) it creates a vast amount of energy without releasing ...
Sunday, October 25, 2015 by anon

Science
If an ion has 12 protons in its nucleus and 10 electrons outside the nucleus, what is the overall charge on the ion? +2 –2 –1 +1
Sunday, October 25, 2015 by Sara

Science
The length of a football field is 100 yards. When you compare geologic time (4.6 billion years) to the length of a football field, you will find that each yard on the field will equal 46 million years, and each 10-yard section will equal 460 million years. Use this ...
Sunday, October 25, 2015 by BroSive

science
Which hormone secreted from ureter,kidneys,urethra?
Sunday, October 25, 2015 by sanjay

science
In which part of the alimentary canal digestion of starch began?
Sunday, October 25, 2015 by sanjay

SCIENCE
a geologist working in a national park finds a mineral. he is carrying a kit that contains a penny, a hand lens, a pice of tile, a geologic hamer and a jack knife decribe how the geologist can use these items to determine some of the mineral's characteristics its an open ...
Sunday, October 25, 2015 by AABBCC

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% i think its B The nucleus of ...
Sunday, October 25, 2015 by manny

SCIENCE
Which of the following tissues would send a message to the brain indicating that someone has touched something hot? A. Epithelial tissue B. Nervous tissue C. Muscle tissue D. Connective tissue i think its B Which of the following describes the classification of humans? A. The ...
Sunday, October 25, 2015 by manny

science
Plant~Deer~Tiger The first step in the energy chain that created the bonds of proteins in the tiger's muscle cells in the food chain shown above is the A. deer the tiger ate. B. plant the deer ate. C. photons the sun made. D. carbohydrates the plant made. i think B
Sunday, October 25, 2015 by manny

science
When salt (NaCI) is added to water, it disassociates into Na and Cl-ions. Which of the following types of chemical bond is present in a salt molecule? A. Covalent bond B. Ionic bond C. Hydrogen bond D. Disulfide bond i think its B An example of active immunity is the transfer ...
Sunday, October 25, 2015 by manny

life science
How predation,competition and symbiosis each interaction influences the population size of the organisms involved
Sunday, October 25, 2015 by thobeka

SCIENCE
the african plate is moving toward the eruasian plate at a rate of a few centimwtwes per year. how will this area change in 100 million years? in your answer, consider how continents will change and how the mediterranean sea will change
Sunday, October 25, 2015 by AABBCC

SCIENCE
a geologist working in a national park finds a mineral. he is carrying a kit that contains a penny, a hand lens, a pice of tile, a geologic hamer and a jack knife decribe how the geologist can use these items to determine some of the mineral's characteristics its an open ...
Sunday, October 25, 2015 by AABBCC

Science
1.Why can certain stars sometimes be identified as eclipsing binary stars? A. They are brighter than any single star. B. They are all white dwarfs C. They become dimmer at regular intervals*** D. They are cool red stars. 2. Which of the following is a major difference between ...
Saturday, October 24, 2015 by Shalee ^~^

chemistry
home / study / questions and answers / science / chemistry / a chemical engineer studying the properties of ... Question A chemical engineer studying the properties of fuels placed 1.760 g of a hydrocarbon in the bomb of a calorimeter and filled it with O2 gas The bomb was ...
Friday, October 23, 2015 by patrick

Physical Science-Physics
You need to pick up a book off the floor and place it on a table top that is 0.78 m above ground. You expend 1.56 J of energy to lift the book. The book has an acceleration of 1.54 m/s squared. What is the book's mass?
Friday, October 23, 2015 by Gracie

science
A building is being demolished with a wrecking ball. I want to cross the street where it is swinging without risking being hit.If the cable attached to wrecking ball 20 meters long do i have to cross if i start as soon as the wrecking ball and cable are straight up and down
Friday, October 23, 2015 by Anonymous

Science
From a laboratory process designed to separate water into hydrogen and oxygen gas, a student collected 11.9 g of hydrogen and 78.5 g of oxygen. How much water was originally involved in the process?
Friday, October 23, 2015 by Ashleigh

shahabdulatif science
the velocity of the body moving in a straight line with a constant acceleration, is 10 m/s at a certain instant 't' . after 5 second the velocity become 20 m/s, the velocity 3 second before 't' was?
Friday, October 23, 2015 by Umair

physical science
how does a heat pump prove the law of conservation of energy?
Friday, October 23, 2015 by sidney

science
4. Which of the following explains how natural selection leads to evolution? A. Conditions in the environment reduce completion for resources within a species. B. Helpful variations accumulate among surviving members of the species. C. Overproduction provides food for stronger...
Friday, October 23, 2015 by Melissa bowers

Science
Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA)What was this particular time period called? Why is this time period not really considered a part of Earth’s geologic ...
Friday, October 23, 2015 by Alexia Smith

Science
I am having trouble with this one question. Please help? (: Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA)
Friday, October 23, 2015 by Alexia Smith

science
3. Which term refers to the process by which individuals that are better adapted to their environment are more likely to survive and reproduce? A. natural selection B. overproduction C. competition D. variation I think either A or D
Friday, October 23, 2015 by Melissa bowers

Science
2. Study the amino acid sequences of the same protein taken from four different species of plants. Which pair of plants is most closely related? Species 1: -A-P-A-C-W- Species 2: -G-P-G-S-F- Species 3: -A-P-A-C-F- Species 4: -N-K-M-H-H- A. Species 2 and 4 B. Species 1 and 3 C...
Friday, October 23, 2015 by Melissa bowers

Science
1. Humans developed antibiotics to fight bacterial infections. However, some antibiotics are no longer effective in killing the bacteria they once killed. How does the theory of evolution explain this? A. The antibiotic mutated the bacteria, which allowed resistance to develop...
Friday, October 23, 2015 by Melissa bowers

Calrary science secondly school taraku
Physics.p: a stone whirled at the end of a rope 30cm long makes 10 complete in 2seconds find the angular velocity the lnear speed the distance covered in 5seconds
Friday, October 23, 2015 by Tsavgbir moses

ENVIRONMENTAL SCIENCE
1.4. The population of endangered Partula snails on a small island is currently 325. Conservation measures have been implemented and the population is growing exponentially at a rate of 0.83%. In what year is the snail population expected to reach the conservation goal of at ...
Thursday, October 22, 2015 by Anonymous

science
what is an advantage of a change in pulse after exercising
Thursday, October 22, 2015 by dorri

science
what is science
Thursday, October 22, 2015 by nimo

science
On the planet mars, a free falling object released from rest falls 4m in 1s and is moving at 8m/s at that time. How fast would such an object moving after 2 seconds? 3 seconds?
Thursday, October 22, 2015 by Anonomyus

science
Fill in the blank with the word or phrase that best completes the statement or answers the question. 14. The scientific name for a plant that reproduces with flowers is a(n) (1 point) angiosperm* 15. At certain times of the year, the male sage grouse can be seen inflating the ...
Thursday, October 22, 2015 by anonymous

Science
A car accelerates from 0 to 100km/hr in 10 seconds. Find its acceleration.
Thursday, October 22, 2015 by Anonomyus

Science
Which of Earth sprees contain most of the mass?
Thursday, October 22, 2015 by Mark

Science/physics
Two vectors A and B have magnitude A = 3.00 and B = 3.00. Their vector product is A x B= -5.00k + 2.00i. What is the angle between A and B? According to the answer, the angle is 37 degrees. I see where this comes from. However, we know that sin(36,75)=sin(143,25) So the ...
Thursday, October 22, 2015 by Tarrok

Computer Science
Write a function called myReplace() that performs a task similar to the string.replace() method. This function should take three parameters: The first, called the content string, can be any string. The second, called the token, should be a string containing a single character ...
Thursday, October 22, 2015 by Anonymous

physical science
why a purple flower appears purple when white light shines on it.
Thursday, October 22, 2015 by sidney

Science
1.)which best describes a cave ecoystem?(1 point) A.)Plentiful food, widely varying tempature B.)Plentiful food , constant tempature C.)Very little food , widely varying tempature D.)Very little food, contant tempature i put D am im correct?
Thursday, October 22, 2015 by Quavo #FreeOffset

science, biology
1. What is/are the main factor(s) that determine(s) that your plants will grow into bean plants (or other fast-growing plants that you used for your experiment) and not some other type of plant (genetics, environment, or both)? Explain your answer.
Thursday, October 22, 2015 by kat

science
. Which of the following is the function of pores in the nuclear membrane? A. Preventing the nucleus from overheating B. Permitting passage of molecules C. Blocking pathogen entry D. Activating transcription factors
Thursday, October 22, 2015 by alixie

science
A blood clot is composed of which of the following components? A. Platelets and fibrin B. Erythropoietin and thrombin C. Serum and albumin D. Fibrinogen and globulin
Wednesday, October 21, 2015 by alixie

Science please help :)?
Which of the following happens when a low-mass star runs out of fuel? Choose all that apply. A. Its core becomes a white dwarf B. Its outer layers form a nebula, or vast cloud of gas and dust C. its outer layers expand, and the star becomes a red giant D. gas and dust in a ...
Wednesday, October 21, 2015 by Cami

Science please help :)?
3. which if the following factors determines how long a star will live ? ( 1point ) A . star’s color b. the star’s mass**** c. the star’s diameter d. the star’s distance from the sun 4 . which of the following causes constellations to appear to move ...
Wednesday, October 21, 2015 by Cami

science
name two ways that air gets heated
Wednesday, October 21, 2015 by kaylah

SCIENCE
2. which of the following happens when a low - mass star runs out of fuel ? choose all that apply . ( 3points ) A ITS CORE BECOMES A WHITE DWARF B ITS OUTER LAYERS FORM a nebula , or vast cloud of gas and dust c its outer layers expand , and the star becomes a red giant d. gas...
Wednesday, October 21, 2015 by Shalee ^~^

Science
1. how do scientists classify stars ? (1point ) A. by size , distance , and color b. by size , distance, and brightness c. by color , brightness, and distance d. by size , brightness, and temperature
Wednesday, October 21, 2015 by Shalee

Science
How will you triple volume of an ideal gas in value? Please explain your answer using the ideal gas law (PV = n RT). I figure that you simply multiply everything by three but Im not 100% thats correct.
Wednesday, October 21, 2015 by David Jackson

Science
Factors that can be changed in an experiment
Wednesday, October 21, 2015 by Tameerah

science
A person sits in a chair 3m from a wall on which hangs a plane mirror.Three meters directly behind him stands a woman 1.6m tall.What minimum height of plane mirror on the wall will enable him to see the woman's full height?
Wednesday, October 21, 2015 by Grace Didier

Science
Animals with nerve nets have: A:No specialized neurons B:Sensory neurons but n inter neurons C:Inter neurons but no sensory neurons D:Only motor neurons
Wednesday, October 21, 2015 by ZaCari. Need Help Now

material science, math
Calculate the ratio of the moments of inertia I1/I2 of two beams of rectangular cross section of the same width, one with a height h and the other, made up of three thinner beams of height h/3. I1/I2 = ?
Wednesday, October 21, 2015 by qwerty

science
If your primers are 25 bases in length and are located at position 520 and 1240 in your sequence, how big a PCR product do you expect? The location positions are for the 3' end of the primers.
Wednesday, October 21, 2015 by pringle08

physical science
why the speed of sound is faster in solids than in gases.
Wednesday, October 21, 2015 by sidney

Science
1.)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. ANWSER:They are both likely carriers of the disease, therefore they'd have the recessive ...
Wednesday, October 21, 2015 by Quavo 1/3 of the migos

physical science
hermal conductors don’t have to be hot to transfer heat. According to Ch.16, explain a situation when an ice cube would still transfer heat to another object it is in contact with.
Wednesday, October 21, 2015 by sidney

physical science
Explain how the snowboarder can have both kinetic and potential energy at point B.
Wednesday, October 21, 2015 by sidney

Earth Science
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 ...
Wednesday, October 21, 2015 by Anon

Physical Science
Explain how you can use Boyle's law to determine the new volume of a gas when it's pressure is increased from 270 kPa to 540 kPa? The original volume of gas was 1 l. Assume the temperature and number of particles are consistent. What is the new volume?
Tuesday, October 20, 2015 by Jamie

physcial science
If a step-up transformer has a primary coil with 15 turns, how many turns would be required in the secondary coil in order to increase the voltage from 80 volts to 160 volts? A. 8 turns B. 30 turns C. 80 turns D. 160 turns
Tuesday, October 20, 2015 by sid

physcial science
A transformer has a primary coil with 600 turns and a secondary coil with 300 turns. If the output voltage is 320 volts, what is the input voltage? A. 8 volts B. 150 volts C. 640 volts D. 600 volts
Tuesday, October 20, 2015 by sid

physcial science
What creates a magnetic field? A. charged particles that do not move B. moving electric charges C. gravity D. an isolated magnetic pole
Tuesday, October 20, 2015 by sid

physcial science
A device that changes mechanical energy to electrical energy by rotating a coil of wire through a magnetic field is called a(an) A. transformer. B. generator. C. electromagnet. D. current meter.
Tuesday, October 20, 2015 by sid

SCIENCE HELP ASAP
1 . What is the major difference between ectotherms and endotherms? A. whether or not the animal builds nests on land B. whether or not the animal has been found on several continents C. whether or not the animal maintains a constant body temperature D. whether or not the ...
Tuesday, October 20, 2015 by SE

science
Red car is A. Blue car is B. The Blue car is slower than the A. The Red car starts at a starting point 40m behind the Blue at what point do they meet?
Tuesday, October 20, 2015 by Jessica

physcial science
Which of the following statements about Ohm’s Law is true? A. Increasing the voltage decreases current. B. Keeping the same voltage and decreasing resistance decreases the current. C. Ohm’s law relates power, current and resistance. D. To increase the current, ...
Tuesday, October 20, 2015 by sid

physcial science
What type of current is produced by a battery? A. parallel current B. alternating current C. direct current D. potential current
Tuesday, October 20, 2015 by sid

physcial science
The type of current in your home is mostly A. direct current. B. alternating current. C. series current. D. produced by batteries.
Tuesday, October 20, 2015 by sid

Science
1.)Studies conducted in england during the industrial revolution have shown that children born to poor families were, on average, shorter than those born to wealthier parents. The most likely expalanation for this difference in hieghts is a difference in A.)Nutrition B.)Family...
Tuesday, October 20, 2015 by Douglas

Science
Compute the number of grams if there are 10.7g of c2h6 in complete combustion
Tuesday, October 20, 2015 by Alex

Science
The speed of a motorcycle increases from 10.0 km/hr to 50.0 km/hr in 9.0 seconds. What is the acceleration?
Monday, October 19, 2015 by Paul

Science
What is the average for 4cm 5cm and 5cm
Monday, October 19, 2015 by William

science
A solid spherical ball rolls on table. Ration of its rotational kinetic energy to its total kinetic energy.
Monday, October 19, 2015 by lalit rawat

science
Which of the following is an example of inbreeding? A) a farmer chooses the cos in his or her herd that produce he most milk and breeds only those cows. b) a farmer chooses the cows in his or herd that produces the most milk and breeds them with cows that get sick less often. ...
Monday, October 19, 2015 by Ana

science
Studies conducted in England during the industrial revolution have shown that children born to poor families were, on average, shorter than those born to wealthier parents. The most likely explanation for this difference in height is a difference in A) nutrition b) family size...
Monday, October 19, 2015 by Ana

Science
What is the difference between the density of cold water and the density of hot water.. Explain using the particle theory of matter. Thank You......
Monday, October 19, 2015 by Dj

SS HELP PLZ
Which statement describes the thinking of the enlightenment? A. The power of reason is more important. B. Scientific ideas must fit religious beliefs. C. Only god knows how the world works. D. Faith is more important than science plz help
Monday, October 19, 2015 by anonymous

Science
Which of the following factors does not vary between a fast-following river and a pond that receives no water input? a. oxygen levels b. salt concentration*** c. temperature d. fish species Plzzz help me:)
Monday, October 19, 2015 by Labbayk

phPhysical Science
A bird flew16 km west in 5 hours, then flew 20 km east in 6 hours. What was the bird’s velocity?
Monday, October 19, 2015 by doris

Geo, Math lit, Life science, history
Which career will I be able to do if I study Geography, Mathematical literacy, Life sciences, History, English, setswana and life orientation
Monday, October 19, 2015 by Destiny

science
A circular hole of 150 mm diameter is to be punch out of a 2 mm thick plate. the shear stress needed to cause fracture is 400 Mpa. calculate the minimum force to be applied to the punch.
Monday, October 19, 2015 by Hassan

Statistics
At a certain university, 50% of all entering freshmen planned to major in a STEM (science, technology, engineering, mathematics) discipline. A sample of 36 freshmen is selected. What is the probability that the proportion of freshmen in the sample is between 0.475 and 0.580? ...
Sunday, October 18, 2015 by Obi

Science
Which has a higher gravitational potential energy a mango or a huge boulder falling from the same height with the same acceleration due to gravity
Sunday, October 18, 2015 by Shevel

8th Grade Science
How do adaptations enable organisms to reduce competion for food and other resources PLEASE ANSWER BY 4 (50 MINS)
Sunday, October 18, 2015 by Christina

barberton tvet ,science
calculate the maximum height reached by the bullet
Sunday, October 18, 2015 by sipho

gaya ,college science
Which one of the following is an alkaline earth element? a) carbon b)sodium c)zinc d)iron
Sunday, October 18, 2015 by gaurav verma

science
a bullet leaves a rifle with a velocity of 200m/sec and strikes targt up to 4cm what velocity scould it have pierce the same block of wood up to 16cm?
Sunday, October 18, 2015 by infant

  1. Pages:
  2. <<Prev
  3. 16
  4. 17
  5. 18
  6. 19
  7. 20
  8. 21
  9. 22
  10. 23
  11. 24
  12. 25
  13. 26
  14. 27
  15. 28
  16. 29
  17. 30
  18. Next>>