Monday
August 31, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

science
what happens to insulin when kidney failure happens?
Monday, May 25, 2015 by mmv

science
A ping pong ball and a penny are placed in water. The ping pong ball floats while the penny sinks? What property of water does this demonstrate? I think it has to do with the density. The reason the ping pong ball floats is because it has a lower density than the water. The ...
Monday, May 25, 2015 by mmv

science
If A represents atomic mass and Z represents atomic number, which of the following describes an atom after a proton is emitted from its nucleus? A. A+ 1, Z + 1 B. A-1,Z-1 C. A+ 1, Z-1 D. A-1, Z + 1 My answer is B
Monday, May 25, 2015 by sandra

earth science
_____ currents assist in the transfer of energy from warmer climates to cooler climates
Monday, May 25, 2015 by dustin

4th grade Science (Please Help!)
Bowl A and Bowl B are filled with the same amount of water. Bowl A is covered in plastic wrap. Both bowls are left on a counter. The water level is checked in both bowls after 1 week. What is the independent variable? PLEASE HELP.
Sunday, May 24, 2015 by Yellow

4th grade Science (Please Help!)
Bowl A and Bowl B are filled with the same amount of water. Bowl A is covered in plastic wrap. Both bowls are left on a counter. The water level is checked in both bowls after 1 week. What is the hypothesis? Please HELP!
Sunday, May 24, 2015 by Yellow

Science
what is the combination of waves?
Sunday, May 24, 2015 by Andre

science
What are some scientific terms for metal rust
Sunday, May 24, 2015 by JImmy

Science
When an oxygen atom forms an ion, it gains two electrons. What is the electrical charge of the oxygen ion? A. +2 B. -1 C. -2 D. +1
Saturday, May 23, 2015 by Jamal

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 A. deer the tiger ate B. plant the deer ate C. photons the sun made D. carbohydrates the plant made I think its A because by ...
Saturday, May 23, 2015 by mandi

science
Moths with certain coloring are camouflaged in their habitat. Over time, more moths are born with this coloring. Which of the following best explains the increasing number of moths with this coloring? A. Natural selection B. Gene flow C. genetic drift D. sexual selection I ...
Saturday, May 23, 2015 by mandi

Science
A spherical object made of stone is dropped into a container of water and sinks to the bottoms of the container causing 30N of water to spill out. What is the estimated gravitational force of the object?
Saturday, May 23, 2015 by Ally

Science and maybe re
This isn't really homework, but I thought someone could really help me with this. Did time exist before the Big Bang? I believe in God; if time always existed, why did he make it wait? Looking for a really scientific explanation. Thanks!
Saturday, May 23, 2015 by Science

Science
A balloon filled with air is taken up a mountain with hiker. What is the pressure exerted on the balloon at sea level?
Friday, May 22, 2015 by Theresa

Science
What is the most popular non-renewable energy source?
Friday, May 22, 2015 by Anonymous

Science
Determine the final temperature when 100 g of water absorbs 1000 J of thermal energy, given that the initial temperature of the water is 20.0°C. The theoretical specific heat capacity of water is 4.19 J/g·°C. Show your work below.
Friday, May 22, 2015 by Desirae

7th Grade Science
1. Which of the following statements about continental glacial movement is correct? A. Continental glaciers can only flow uphill. B. Continental glaciers can flow in all directions *** C. Continental glaciers can only flow downhill. D. Continental glaciers do not flow at all. ...
Friday, May 22, 2015 by Aleksander

Science
How does friction affect the height that a ball will bounce? Can you give a hypothesis too of what i'll need to do please!? I'm confused
Friday, May 22, 2015 by Rock

Science
How does friction affect the height that a ball will bounce? Can you give a hypothesis too of what i'll need to do please!? I'm confused
Friday, May 22, 2015 by Ellie_Fan

Science- 8th grade- please help!!
1) What evidence is there that the human species has been successful so far? Explain. 2) What environmental pressures in the past do you think were most important in shaping the human species as it exists today? 3) What environmental pressures exist now that you think may be ...
Thursday, May 21, 2015 by Savannah H

science (theory of evolution)
1.What is two pieces of evidence used to support theory of evolution? Do you guys think it would be alright if I said that they observed nature. And also if you guys could help me come up with another example I would REALLY appreciate it!!
Thursday, May 21, 2015 by anonymous

science
when you turn a television on, you transfer electrical energy into __. choose all that apply. a heat energy b light energy c elastic potential energy d sound energy
Thursday, May 21, 2015 by Anonymous

science
An electric stove transfers heat too a pot by a.) conduction b.) convection c.) radiation d.) friction
Thursday, May 21, 2015 by alyssa

Science
Can you give me help understanding this question? A skydiver prepares to jump out of a plane. Explain how gravity and air resistance will affect the motion of the skydiver before and after he or she opens the parachute.
Thursday, May 21, 2015 by Stephanie

GEN 499
Question 25. 25. <21{8[1(07)95]}> Political science professor: Many people insist that the Internet is revolutionizing the political process. They argue that Internet debates and online political polls and chat rooms give people greater access to political information. ...
Thursday, May 21, 2015 by Mr. Doc

Science
what happens immediately before a volcano erupts ? a) magma collects in the mantle** b) lava hardens to form volcanic rock c) expanding gases pushes magma through the pipe d) the temperature in the magma chamber decreases
Wednesday, May 20, 2015 by Anonymous

Science
Okay, so I have been working on this question for about two weeks...craxzy right?! BUt help 1. How does salinity affect the temperature and density of water?
Wednesday, May 20, 2015 by Meep

physical science
The force of gravity acting on a body is 675 newtons. find the mass of the body to the nearest kilograms.
Wednesday, May 20, 2015 by Anonymous

physical science
Why is the atmosphere pressure lower on a high mountain peak than at sea level?
Wednesday, May 20, 2015 by Anonymous

science
1. How is an area’s topography determined? (1 point) A.by using an area’s longitude and latitude B.by using an area’s scale C.by using an area’s elevation, relief, and landforms*** D.by using an area’s elevation, longitude, and latitude 2. How do ...
Wednesday, May 20, 2015 by .... :)

science
A patient takes the recommended dosage of painkiller pills, but does not feel any immediate effect. What should the patient do next?
Wednesday, May 20, 2015 by xezavious

science
the cake is sititing on table with a gravitation force of 57.6 and a normal force of 57.6 what is the sum of all forces
Wednesday, May 20, 2015 by Anonymous

physical science
What is the momentum, in kg-m/s of a 54,000 kg ship going 12 mph?
Tuesday, May 19, 2015 by Anonymous

physical science
How many kilojoules are required to melt 5 lbs of gold if its initial temperature is 1000 K?
Tuesday, May 19, 2015 by Anonymous

Science
How can using biomass fuels instead of gasoline in car engines help conserve natural resources? a. I makes cars run faster. b. It burns more fossil fuels. c. It reduces the use of coal.<---- d. It uses a renewable resource.
Tuesday, May 19, 2015 by Anonymous

science
During a reaction of ca(oh)2 with carbon dioxide gas, 20g of solid caco3 is formed. calculate the mass of the nahco3 needed to produce the amount of carbon dioxide gas responsible for forming the caco3 precipitation.
Tuesday, May 19, 2015 by lusi sinuma

Science
Name the Pb (NO³)²
Tuesday, May 19, 2015 by Pb (NO³)²

science
What is mixture?
Tuesday, May 19, 2015 by Mixture

Science
1. What type of map would you use to locate the mountain ranges on a continent? idk!
Tuesday, May 19, 2015 by Meep

Science (Chemistry)
So all I have to do now is cross multiply and solve for x right? Also when that happens, how do I factor the x^3? What do I do?
Tuesday, May 19, 2015 by Kibito

Science (Chemistry)
Hello DrBob222 Regarding the answer you gave me thank you very much. However when you expand the denominator, I don't get -0.14 but I get -0.28. I get that because when I first expand I get 0.0049 - 0.14x - 0.14x + 4x^2. So when I simplify that I get -0.28x. So could you ...
Tuesday, May 19, 2015 by Kibito

Science
1.A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? (1 point) A.frequency and wavelength B.wavelength and wave speed C.amplitude and wavelength D.amplitude and frequency 2. ...
Tuesday, May 19, 2015 by Tom

science
How would the ecosystem’s carrying capacity for a species change, if the species cannot adapt to changes of habitat?
Tuesday, May 19, 2015 by Shay

science
What can happen to an animal species if it cannot adapt to changes taking place in its habitat?
Tuesday, May 19, 2015 by Shay

science
Which of the following is the best course of action when it comes to using natural resources? A. Only nonrenewable resources should be carefully managed B. Only renewable resources should be carefully managed C. Conservation should be implemented for both renewable and ...
Tuesday, May 19, 2015 by Anonymous

science
How many joules of heat is required to change 40.0g of ice at 0degrees Celsius to liquid water at 0 degrees Celsius.
Tuesday, May 19, 2015 by hilda

science (any tutor)
Which kind of pollution is illustrated by a pipe gushing polluted water into a river? A. Point source*** B. Nonpoint source C. Carbon source D. Resource source
Tuesday, May 19, 2015 by Anonymous

Science (Chemistry)
A chemical system within a sealed 1 L reaction vessel is described by the following reversible reaction equation: 2H2S(g) <---> 2H(g) + S2(g) If the equilibrium constant is 0.000 004 200 at 1103 K find: (a) the reaction quotient intially (b) the order of concentration of...
Tuesday, May 19, 2015 by Kibito

science
when 8.4 g of NaHCO3 is added to a solution of CH3COOH weighing 20 g .It is observrd that 4.4 g of CO2 is releasd into atmosphere and a residue is left behind .calculate the mass of residue by applying law of conservation of mass .
Tuesday, May 19, 2015 by vishal

science
the resultant of two forces 13n and 20 n is f if the first forces is doubled the resultant is also doubled to 2f find the angle betwen the two forces
Monday, May 18, 2015 by physics

science
how physical/mechanical and chemical weathering different?
Monday, May 18, 2015 by Natalie

science
how are physical/mechanical and chemical weathering alike?
Monday, May 18, 2015 by Natalie

Science (Chemistry)
A chemical system within a sealed 1 L reaction vessel is described by the following reversible reaction equation: 2H2S(g) <---> 2H(g) + S2(g) If the equilibrium constant is 0.000 004 200 at 1103 K find: (a) the reaction quotient intially (b) the order of concentration of...
Monday, May 18, 2015 by Kibito

Science
Sorry Ms Sue I forgot to separate them A species of flowering plant produces vibrant blue flowers. The flowers attract both pollinators that spread the plant's pollen and herbivores that feed on the plant. An adaptation occurred through several generations of plant species...
Monday, May 18, 2015 by anonymous

Science
Can you please help me answer just a couple questions A species of flowering plant produces vibrant blue flowers. The flowers attract both pollinators that spread the plant's pollen and herbivores that feed on the plant. An adaptation occurred through several generations ...
Monday, May 18, 2015 by anonymous

Science
How could sustainable use preserve biodiversity in hot spots?
Monday, May 18, 2015 by M

Science
During a space shuttle landing, a parachute deploys from the back of the shuttle as it taxis down the runway. In addition to the speed brake, the parachute helps the shuttle come to a complete stop. How does the parachute help during this process? A. It increases the weight of...
Monday, May 18, 2015 by Connie

science
A bicycle tire is filled with air to a pressure of 6.80 atm and a temperature of 19 degrees Celsius. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 degrees Celsius. The volume of the tire increases by 4.0%.What is the new pressure in the ...
Monday, May 18, 2015 by sikhonaye

science (any tutor)
Similarities in the early development of chickens and opossums suggest that these organisms share a________. common ancestor???
Monday, May 18, 2015 by Anonymous

science (any tutor)
a farmer sprays insecticide on his crops and notices that the insect pest problems disappear. a year later he tries the same insecticide only to find that he did not achieve the same result. the insect population shows resistance to the insecticide.This is na example of _____ ...
Monday, May 18, 2015 by Anonymous

science school
A body of mass 20g appears to have a mass of 13g in oil and 12g in water what is the relative density of oil.
Monday, May 18, 2015 by Anonymous

science (any tutor)
Narwhals are aquatic mammals known for the giant tusk that protrudes from their upper lip. These mammals live in artic waters and can spend more than three hours at a time underwater at great depths that would crush other animals. The narwhal's ability to endure such long ...
Monday, May 18, 2015 by Anonymous

science (any tutor)
Similarities in the early development of chickens and opossums suggest that these organisms share a________. common ancestor???
Monday, May 18, 2015 by Anonymous

science (any tutor)
Very few fossils of jellyfish or their close relatives have been found. This makes it hard to trace the evolutionary history of jellyfish using the fossil record. What explains this? A. Jellyfish fossils are buried deep under the ocean floor, not in land areas where scientists...
Monday, May 18, 2015 by Anonymous

science (any tutor)
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 ...
Monday, May 18, 2015 by Anonymous

science (any tutor)
2. How did Darwin and Lamarck differ in their thinking about change in 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 ...
Monday, May 18, 2015 by Anonymous

science (any tutor)
3. Luther Burbank was a plant breeder who developed a strain of potato plant that produced more tubers 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 blight that had wiped out the potato ...
Monday, May 18, 2015 by Anonymous

Ms. Sue PLZ HELP!!!(science)
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
Monday, May 18, 2015 by Anonymous

science
a body of mass 5kg is thrown to a height of 100m.what is its potential energy at the maximum height.?
Monday, May 18, 2015 by steve

science
calculate the volume of gas at STP that is produced when 1g of silver nitrate is heated. the unbalanced reaction is: AgNO3(s)=Ag(s)+NO2(g)+O2(g)
Monday, May 18, 2015 by Mahlako

Science 8
I need help on this portfolio project, I have to do a lab report on light refraction. The research question is "How does change in medium affect light?" and I need to make a hypothesis, but I don't know what to put.
Sunday, May 17, 2015 by Hannah

WEATHER SCIENCE SOS! I NEED ANSWERS CHECKED! SOS
How does latitude affect climate? a.) Areas near the equator have cooler climates than areas far from the equator. b.) Areas near the equator have warmer climates than areas far from the equator.*** c.) areas near the equator have 4 seasons.*** d.) areas near the equator do ...
Sunday, May 17, 2015 by D-D-D-DROP DA BASE.

Science
What is the similarities between conduction and radiation What is the similarities between convection and radiation
Sunday, May 17, 2015 by Cynthia

science
if the actual mass of oxide at the end of the experiment is 130g, what is percentage yield?
Sunday, May 17, 2015 by Mahlako

science
name four principles of kinetic friction
Sunday, May 17, 2015 by temo

science
How many kcal of heat energy are removed from the body with every 1 L of sweat?
Sunday, May 17, 2015 by Val

Science help
Provide two statements that demonstrate the importance of units when describing motion. I don't know how to answer this question :(
Saturday, May 16, 2015 by Midnight

science (percentage yield)
if 100g of iron reacts with excess oxygen, how much rust should be produced?
Saturday, May 16, 2015 by Mahlako

Science
What is the mass of 0.8mol of Na(ii)CO(iii)
Saturday, May 16, 2015 by Kitsi

Science
Which is the first layer of the atmosphere?
Saturday, May 16, 2015 by floppy

Science
Which of the following is true about all electromagnetic waves in a vacuum? A. they all carry the same energy B. they all travel at the same speed C. they all have the same frequency D. they all have the same wavelength I think it's B
Friday, May 15, 2015 by Kel

Science
are animal species just any kind of animals.
Friday, May 15, 2015 by Shay

Science
Which of the following correctly describes a gamma ray? A.long wavelength and low frequency B.long wavelength and high frequency C.short wavelength and low frequency D.short wavelength and high frequency*** check please
Friday, May 15, 2015 by Kel

Science
When the energy of a sound wave is transferred to a particle of a medium and causes it to vibrate and generate hear, the sound wave is A. reflected B. refracted C. absorbed D. transmitted I think it's C. check please
Friday, May 15, 2015 by anonymous

science
is a squirrel a animal species
Friday, May 15, 2015 by brooke

Science check answers
1. Which of the following explains how natural selection leads to evolution? Conditions in the environment reduce competition for resources within a species Helpful variations accumulate among surviving members of the species*** Overproduction provides food for stronger ...
Friday, May 15, 2015 by Caleidoscope

Science 8th Grade
In what ways can outside forces affect an object's motion, position, and shape?
Friday, May 15, 2015 by Archy

science
find the no. of electron transferred between two ppints kept at a potential difference of 20V if 40 J of work is done
Friday, May 15, 2015 by sandeep

Science
Name two types of evidence used to support the theory of evolution. Explain how scientists use each type of evidence to provide support for evolution. Give one example of each.
Thursday, May 14, 2015 by baby2015

Science
How did Darwin and Lamarck differ in their thinking about change in species? Darwin thought that organisms could induce their own changes, while Lamarck thought that change could only be induced by an organism’s environment. Darwin thought that change could occur in ...
Thursday, May 14, 2015 by Elizabeth

science
If you could double check my answer that would be awesome :) which of the following is not part of the theory of evolution? Organisms tend to produce more offspring than can survive to reproductive age ** Organisms can acquire changes during their lifetime that can help their ...
Thursday, May 14, 2015 by anonymous

Science, please check my answer Ms Sue!
How does a hurricane form? a.)It forms over a warm ocean water as a low-pressure area*** b.) it forms over a warm ocean as a high-pressure area. c.) it forms over cool ocean water as a low-pressure area d.) it forms over a cool ocean water as a high-pressure area. My answer is...
Thursday, May 14, 2015 by Carla

Science
The diagrams show two views of the same river flowing from a lake to an ocean bay. Which diagram below best represents the profile of the river bottom between points C and B?
Thursday, May 14, 2015 by Daniela

science
Suppose some natural disaster occurs and a species of finch is forced to relocate from its original island where it dined on cactus flowers to an adjacent island with many fewer cacti but an overabundance of orchids. What would be the immediate consequences to the species in ...
Thursday, May 14, 2015 by David101

science or biology
Similarities in the early development of chickens and opossums suggest that these organisms share a __________. I think is common ancestor
Thursday, May 14, 2015 by claudia 2015

biology o science
Very few fossils of jellyfish or their close relatives have been found. This makes it hard to trace the evolutionary history of jellyfish using the fossil record. What explains this? (1 point) Jellyfish fossils are buried deep under the ocean floor, not in land areas where ...
Thursday, May 14, 2015 by claudia 2015

Science
2. How did Darwin and Lamarck differ in their thinking about change in species? I think its a
Thursday, May 14, 2015 by hibye2015

English
7.) "To Mrs. Saville, England, St. Petersburg, Dec. 11th, 17" You will rejoice to hear that no disaster has accompanied the commencement of an enterprise which you have regarded with such evil foreboding..." This excerpt from the introductory portion of Mary ...
Thursday, May 14, 2015 by Cassie

psychology
PLEASE HELP LAST QUESTION.??? Among William James's contributions to the science of psychology is that he A. he wrote the first American text in psychology b.. developed a psychodynamic treatment for mental illness. c.experimented with classical conditioning d. developed ...
Thursday, May 14, 2015 by karla

Science
Find the density in g/cm3 of a 1573 cm3 piece of metal having a mass of 46 kg.
Thursday, May 14, 2015 by Angela

  1. Pages:
  2. <<Prev
  3. 1
  4. 2
  5. 3
  6. 4
  7. 5
  8. 6
  9. 7
  10. 8
  11. 9
  12. 10
  13. 11
  14. 12
  15. 13
  16. 14
  17. 15
  18. Next>>

Members