Saturday
May 30, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

science
an empty truck with a mass of 3000 kg has a maximum acceleration of 1m/s2 .what will its acceleration be when it carries a load of 1000 kg?
Saturday, September 27, 2014 at 5:08am

Science-HELP?
A map of Florida is an example of a(n) ________. *I researched this a little bit and I thought it might be peninsula. Can someone verify this for me please? There aren't any choices either.
Friday, September 26, 2014 at 7:57pm

Science URGENT
Marquez is in the ocean on his surfboard. While waiting for the perfect ride, he notices that waves pass him about every 4 s. What is the frequency of the waves? A. 0.75 Hz B. 0.5 Hz C. 0.25 Hz D. 0.2 Hz
Friday, September 26, 2014 at 5:30pm

Science
Choose the explanation that does the following: (1) identifies the element used in carbon dating and (2) explains why the element is used. A. iodine-131; iodine is present in the thyroid glands, is radioactive, and has a very long half-life B. nitrogen-14; radioactive carbon ...
Friday, September 26, 2014 at 4:53pm

Science
Marquez is in the ocean on his surfboard. While waiting for the perfect ride, he notices that waves pass him about every 4 s. What is the frequency of the waves? 0.75 Hz 0.2 Hz 0.5 Hz 0.25 Hz
Friday, September 26, 2014 at 4:29pm

Science
Harold walked into his kitchen and noticed that the bowl of bananas he keeps in the corner had many fruit flies around it. When he reached the bowl, he noticed that one of the bananas had its peel partially pulled apart, and the fruit inside the peel had turned brown and a ...
Friday, September 26, 2014 at 2:55pm

Science
Your family is going to have a contractor build a pool in your backyard. Your mom wants to make this a learning experience, so she asks you to find the mass of the water that will fill the pool. She has told you that the pool holds 75,700 L of water, and you know that the ...
Friday, September 26, 2014 at 2:43pm

Science
I have two questions for 7th grade Science. I've been sitting here for a while, and I am behind in school work. Please Help. _____ is the practical use of scientific knowledge to solve everyday problems and improve lives ____ are used to make complicated concepts and ...
Friday, September 26, 2014 at 2:30pm

Science
The force of 100dynes acts on a mass of 50 grams for 10 seconds. Find the change in moentum
Friday, September 26, 2014 at 4:58am

Science: Acids that affects the tooth enamel
I know phosphorus and amino acids has their roles with affecting the tooth enamel, but is there other acids that can help or destroy the tooth enamel? Thank You in advance.
Friday, September 26, 2014 at 4:12am

science
which of the following is an example of an effect of natural selection. A. all of the children of two parents are male. B. carbon cycles through ecosystem. C. favorable environmental conditions cause an increased food supply. D. polar bears have white fur.
Thursday, September 25, 2014 at 9:17pm

science
Why did a portion of the tabletop get cold when Natasha placed her cold drink on the table? (1 point) The table’s molecules were vibrating more slowly in that area. The table’s molecules had spread further apart in that area. The table’s molecules had gained ...
Thursday, September 25, 2014 at 7:08pm

science
what is the way that an organism either builds up or breaks down materials in the body for energy
Thursday, September 25, 2014 at 5:45pm

science
what volume occupy 90g/
Thursday, September 25, 2014 at 4:02pm

Science! URGENT
Bacteria can reproduce through asexual or sexual reproduction. Environmental conditions for a particular bacteria species are good and the bacteria are thriving. Which form of reproduction will the bacteria most likely use? A. The bacteria will most likely reproduce through ...
Thursday, September 25, 2014 at 3:54pm

Science! URGENT
How might sexual reproduction decrease an organisms chance of survival? A. If the offspring inherits a genetic combination that includes a harmful trait, it could decrease the organisms chance of survival. B. If the offspring inherits the exact sane genetic information as its ...
Thursday, September 25, 2014 at 3:39pm

Science! Help!!
What would happen if gametes were not haploid? A. If gametes were not haploid, the offspring would have half the number of chromosomes it is supposed to have. B. If gametes were not haploid, the offspring would have double the number of chromosomes it is supposed to have. C. ...
Thursday, September 25, 2014 at 2:31pm

P5 Science
My full question. A leaf was plucked from the garden. The procedure for testing for starch in the leaf was carried out. Part of the leaf turned blue-black and part of the leaf just turned brown. Question : Why do you think the other part of the leaf did not contain starch?
Thursday, September 25, 2014 at 12:10pm

P5 Science Energy
Please help me.... State the energy conversions in the maglev wind power station. ____energy(wind)-->_____energy(turbin​es)-->_____energy(generators)
Thursday, September 25, 2014 at 11:51am

P5 Science Energy
Part of the leaf that turned brown.
Thursday, September 25, 2014 at 11:48am

P5 Science - Energy
Need help.. Why do you think the other part of the leaf did not contain starch?
Thursday, September 25, 2014 at 11:03am

Science! Help!!
In pea plants, purple flowers are dominant over white flowers. Which Punnet square correctly shows the cross of a plant with white flowers and a plant that is heterozygous for purple flowers? A. Aa,Aa, aa, aa B. Aa,Aa, Aa,Aa C. AA,Aa, Aa,aa D. AA,AA, Aa,Aa Is the answer D?
Wednesday, September 24, 2014 at 6:09pm

Science! Help!!
Which of the following traits is acquired? A. The number of petals that grow in a plants flowers. B. The wing shape of a wild bird C. The ability of some gorillas to use sign language D. A cheetah's ability to run faster than any other land animal. Is the answer B?
Wednesday, September 24, 2014 at 5:58pm

science
the neuron that transmit the signal to your foot to kick a soccer ball are called reflexes motor neurons sensory neurons interneurons
Wednesday, September 24, 2014 at 4:49pm

science
the neuron that transmit the signal to your foot to kick a soccer ball are called reflexes motor neurons sensory neurons interneurons
Wednesday, September 24, 2014 at 4:39pm

Science
smallest unit that consists of at least one atom A. Protons B. Neutrons C. Electrons D. Molecules Im thinking D but im not sure i don't remember.
Wednesday, September 24, 2014 at 2:15pm

Science
Dust mites are microscopic bugs that are too small to see with a dissecting microscope. To see the details of a dust mite’s skin, which of the following microscopes would you use? A. dissecting microscope B. compound microscope C. transmission electron microscope D. ...
Wednesday, September 24, 2014 at 1:13pm

science
how much energy and joules are in bag of crisps?
Wednesday, September 24, 2014 at 11:13am

science
what is function of the nucleons in a cell?
Wednesday, September 24, 2014 at 10:29am

science
The energy of a mole of photons with frequency 6.00x10^14Hz is what in kJ?
Wednesday, September 24, 2014 at 10:24am

science urgnt vry urgnt for exam purpouse
explain why sliding friction is less than static friction
Wednesday, September 24, 2014 at 9:08am

Science
The gradient or slope of the distance time graphy at any pont gives
Tuesday, September 23, 2014 at 10:09pm

SCIENCE
If we decrease the distance an object moves we will decrease the amount of force applied. Decrease the amount of work done. increase the amount of force applied. increase the amount of work done.
Tuesday, September 23, 2014 at 7:20pm

science
Do all animals reproduce?
Tuesday, September 23, 2014 at 7:19pm

science Help
A long-haired cat (recessive trait s) is crossed with a heterocygous short-haired cat (dominant trait S). What percentage of their offspring will have long hair? A. 100 percent B. 50 percent C. 25 percent D. 0 percent Is the answer C?
Tuesday, September 23, 2014 at 7:18pm

science Help
In humans, having more than five fingers or toes is dominant over having exactly five finger or toes. Which of the following situations would most likely result in exactly half of a couple's offspring having six digits and half of them having five? A.Both parents are ...
Tuesday, September 23, 2014 at 6:58pm

Science
A piece of aluminum has a mass of 39.15g and a volume of 14.5cm cube. Determine the density of the aluminum. What would the density be of a much larger piece of aluminum? explain. I established the density of the al. is 2.7g/ cm cube. I dont get the second part of the question?
Tuesday, September 23, 2014 at 6:46pm

Science
Why might scientists first want to build and study a model of their proposed project?
Tuesday, September 23, 2014 at 6:38pm

Science
What microscope would you use to observe dust mite's skin?
Tuesday, September 23, 2014 at 6:37pm

Science! Help
In humans, having more than five fingers or toes is dominant over having exactly five finger or toes. Which of the following situations would most likely result in exactly half of a couple's offspring having six digits and half of them having five? A.Both parents are ...
Tuesday, September 23, 2014 at 6:32pm

Science
If the coordinates of points A and L are -4 and 8, respectively, then the midpoint between them has a coordinate of____ A- 0 B- 2 C- 4 D- 6 Please help me understand this!
Tuesday, September 23, 2014 at 6:26pm

Science! Help
In humans, having dimples is a dominant trait. If one parent has dimples and is homosygous for the trait, what is the probability any of his or her offspring will NOT have dimples? A. 100 percent B. 50 percent C. 25 percent D. 0 percent Is the answer D?
Tuesday, September 23, 2014 at 6:18pm

Science
Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life. i wrote, If we understand scientific principles and think like a scientist we solve problems in our ...
Tuesday, September 23, 2014 at 6:04pm

science Help
Which of the following describes the genotype and phenotype of parents whose child will definitely have a recessive trait? A. Both parents are homozygous for the recessive allele and have the trait. B. Both parents are homozygous for the recessive allele but do not have the ...
Tuesday, September 23, 2014 at 5:51pm

science Help
A long-haired cat (recessive trait s) is crossed with a heterocygous short-haired cat (dominant trait S). What percentage of their offspring will have long hair? A. 100 percent B. 50 percent C. 25 percent D. 0 percent Is the answer C?
Tuesday, September 23, 2014 at 5:46pm

Science Help
A long-haired cat (recessive trait s) is crossed with a heterocygous short-haired cat (dominant trait S). What percentage of their offspring will have long hair? A. 100 percent B. 50 percent C. 25 percent D. 0 percent Is the answer C?
Tuesday, September 23, 2014 at 5:15pm

Science Help
Which of the following describes the genotype and phenotype of parents whose child will definitely have a recessive trait? A. Both parents are homozygous for the recessive allele and have the trait. B. Both parents are homozygous for the recessive allele but do not have the ...
Tuesday, September 23, 2014 at 5:03pm

science Help
White skin (W) is dominant over yellow skin (w) in chickens. Which of the following genotypes would result in a white-skinned chicken that could possibly have yellow-skinned offspring? A. WW B. Ww C. ww Is the answer B?
Tuesday, September 23, 2014 at 4:51pm

Science
Felipe made a toy boat out of clay, but it kept sinking in water. He changed the boat's design by making it slightly wider than before. Why did Felipe's newly designed boat float on water? A. He decreased the density by increasing the volume. B. He decreased the ...
Tuesday, September 23, 2014 at 2:25pm

Science
An object has a volume of 22 liters and a mass of 35 kilograms what's the objects density?¿???????????????
Tuesday, September 23, 2014 at 2:20pm

science
ind the molality of the solution obtained when 36.5 gram HNO3 is dissoloved in 750 gram water
Tuesday, September 23, 2014 at 12:43pm

Science
using an example explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life? Do you have any suggestions
Tuesday, September 23, 2014 at 12:15pm

Science--Help.
Which of the following is NOT one of the eight most common elements in Earth’s continental crust? carbon silicon oxygen aluminum The most abundant element in Earth’s continental crust (by weight) is _____. 2. oxygen silicon calcium iron 3. The central region of an ...
Tuesday, September 23, 2014 at 11:40am

Science
Which of the following units are in order from smallest to largest? a) Epoch, period, era. b) Era, epoch, period. c) Period, era, epoch. d) Epoch, era, period. True or False? Folding, as well as motion along faults, can change the position of rock layers and how they line up ...
Tuesday, September 23, 2014 at 9:42am

science
calculate the number of moles inside a soap bubble 1cm in diameter and 1atm pressure at a temperature of 25 degree celsius.
Tuesday, September 23, 2014 at 3:16am

Science
A controlled experiment is designed to test a ___. (1 point) control hypothesis theory** prototype Thanks I greatly appreciate it!
Monday, September 22, 2014 at 10:58pm

Science
suppose that you are walking down the street. Describe the force acting on you, and describe how they change your motion
Monday, September 22, 2014 at 9:28pm

Physical Science
Superfly, mass of only 1 gram, but capable of flying 840 million km/hr. meets a locomotive with a mass of 20,000 kg, traveling 40 km/hr. Who has the greater momentum? I know I need to convert mass to kg and covert momentum in Kg-Km/hr. I just don't know how. Please help.
Monday, September 22, 2014 at 8:03pm

Physical Science
Johnson ran the 100 meter dash in 9.79 seconds. Calculate Johnson's average speed, in meters/second.
Monday, September 22, 2014 at 7:56pm

science
An experiment was performed how the amount of coffee grounds could affect the taste of coffee. The same kind of coffee, the same percolator, the same amount a type of water, the same perking time, and the same electrical source were used. Identifying variables Independent, ...
Monday, September 22, 2014 at 7:56pm

integrated science
list nine digestive enzymes in the body plz answer fast thank u
Monday, September 22, 2014 at 7:49pm

science
A Scientist wonders if the amount of Vitamin C that he feeds to rats will have any affect on the rat's mass. He measured both the mass of the rats and the amount of vitamin C in grams. I need to find the Independent variable, Dependent variable and the controlled variable?
Monday, September 22, 2014 at 7:47pm

integrated science
what are atoms
Monday, September 22, 2014 at 7:44pm

Science
Explain the role of a hypothesis in a scientific investigation.
Monday, September 22, 2014 at 7:15pm

Science
In terms of energy, what is the difference between glucose and ATP?
Monday, September 22, 2014 at 7:02pm

Science
Explain how sunlight is the primary source of energy for your own life? Please help!
Monday, September 22, 2014 at 6:57pm

science
1.A melting glacier leaves behind _______ 2.One place to find large, moving _______ is in cold mountain areas 3. Glaciers scoop out _______ that can later fill up with water 4.The movement of some glaciers is helped by _____ 5.Climate change can affect the speed of a glacier&#...
Monday, September 22, 2014 at 6:54pm

science
what is another path that a scientist might follow using the data from an experiment that did not support the hypothesis .
Monday, September 22, 2014 at 5:48pm

science 1 question
A student measures the volume of a liquid and finds it to be 40mL. How many significant figures are in the measurement? 1 2 3 4 I do not know if it is 1 or 2!??
Monday, September 22, 2014 at 3:13pm

Science
which of the following is a correctly balanced equation A.2Cu+O2--> 2CuO B.Mg + O2--> MgO2 C. 3KCI+HNO3-->3HCl+KNOW D. CaCO3---> CaO+CO3 answer b
Monday, September 22, 2014 at 2:54pm

Science(Energy)
Which of the following is the best example of transforming electromagnetic energy into thermal energy? A. when trees absorb sunlight for photosynthesis B. when the interior of a car absorbs sunlight and warms up C. when a solar panel absorbs sunlight to make electricity D. ...
Monday, September 22, 2014 at 2:45pm

science
make it right A lot of the rubbish we produce on land pollutes the park.
Monday, September 22, 2014 at 8:53am

science
1.3 mol of calcium carbonate decomposed to calcium oxide and carbon dioxide. How many grams of calcium oxide is produced?
Monday, September 22, 2014 at 8:07am

science
how do you covert 0.779 kl to l to ml to hl using the decimal method
Sunday, September 21, 2014 at 2:41pm

science
If a certain gas occupies a volume of 20L when the applied pressure is 10atm , find the pressure when the gas occupies a volume of 5.0L
Sunday, September 21, 2014 at 10:49am

science
if the displacement of a particle varies with time as root of x= t+7, the a)velocity is inversely proportional to t b)velocity is proportional to square of t c)velocity is proportional to root of t d)particle moves with constant acceleration pls help...i have no idea how to ...
Sunday, September 21, 2014 at 10:41am

science
a ball is thrown vertically upwards from the top of a tower with a speed of 100 ms-1. it strikes the pond near the base of the tower after 25 seconds. the height of the tower is? a)500m b)125m c)625m
Sunday, September 21, 2014 at 10:30am

Environmental Science
What are some common justifications for environmental policy?
Saturday, September 20, 2014 at 10:37pm

HELP IN SCIENCE ASAP!!
PLEASE CHECK ANSWERS!!
Saturday, September 20, 2014 at 6:57pm

Science
If a car accelerate at 10m/s for 5 mins what is the is the change in speed
Saturday, September 20, 2014 at 6:37pm

Science
Which of the following best describes the dependent variable in an experiment? A- the variable that is measured B- the variable that is manipulated C- the variable that you can see D- the variable that is most common (My guess is A) Photosynthesis is the process whereby plants...
Saturday, September 20, 2014 at 5:56pm

Science(Magnets)
Should be easy, this. The two south pole ends of two magnets are touching. Which of the following can be concluded? A. No work was required by an outside force. B. The magnets are naturally attracted to each other. C. Work was required by an outside force. D. The potential ...
Saturday, September 20, 2014 at 8:45am

Science
Name the two compounds formed when ethane burns in an excess of oxygen
Saturday, September 20, 2014 at 1:55am

Science
Name the two compounds formed when ethane burns in an excess of oxygen.
Friday, September 19, 2014 at 10:44pm

HELP IN SCIENCE ASAP!!
PLEASE HELP!!
Friday, September 19, 2014 at 10:16pm

Science
Which of the following explains the relationship between genes and chromosomes? A. Chromosomes come in different versions called genes. B. Genes come in different versions called chromosomes. C. Chromosomes are structures that are made up of two versions of multiple genes. D. ...
Friday, September 19, 2014 at 9:46pm

science
A pea plant with yellow seeds is crossed with a pea plant with green. All of the offspring have yellow seeds. The allele for yellow seeds is A. Dominant because all of the offspring have yellow seeds. B. Recessive because all of the offspring have yellow seeds. C. Dominant ...
Friday, September 19, 2014 at 9:16pm

Science
The desert tortoise digs a burrow and hides in it during the day to stay cool, because of the extreme heat above ground. Which characteristic of life does this behavior best illustrate? A- response B- metabolism C- cellular organization D- growth and development (my guess is A...
Friday, September 19, 2014 at 8:35pm

Science
The desert tortoise digs a burrow and hides in it during the day to stay cool, because of the extreme heat above ground. Which characteristic of life does this behavior best illustrate? A- response B- metabolism C- cellular organization D- growth and development (my guess is A...
Friday, September 19, 2014 at 6:53pm

Life Science, Maths Literacy, CAT, Business studie
Which course can I enrol for with those subjects? Please help..
Friday, September 19, 2014 at 6:25pm

Science
Which of the following shows the levels of organization in a multi-cell organism from the smallest level to the largest level? A- cell, tissue, organ, organ system, organism B- organism, organ system, organ, tissue, cell C- tissue, cell, organ, organ system, organism D- cell, ...
Friday, September 19, 2014 at 6:09pm

Science
Hemlocks are a common type of tree in the northern forests of the United States. In studying one forest, a forester noticed that mature hemlocks were abundant but there were very few young hemlocks. She wondered why there were so few young hemlocks. By reading the records that...
Friday, September 19, 2014 at 5:44pm

Science
Refer to the following scenario to answer Questions 3 through 7. Hemlocks are a common type of tree in the northern forests of the United States. In studying one forest, a forester noticed that mature hemlocks were abundant but there were very few young hemlocks. She wondered ...
Friday, September 19, 2014 at 5:10pm

Science
How does eye location beast represent the relationship between sturcture and function? A- it determines how much of the surroundings an organism can see. B- it affects how an organism interacts with others in its population C- it indicates the maximum height an organism can ...
Friday, September 19, 2014 at 4:36pm

Science
Name a molecule that transmits energy. Answer: Energy Molecule
Friday, September 19, 2014 at 11:50am

physical science
Two 3.4 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books?
Friday, September 19, 2014 at 9:56am

science
Name a molecule that transmits energy. Answer: Energy Molecule
Friday, September 19, 2014 at 8:51am

physics
Two 2.5 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books?
Friday, September 19, 2014 at 12:06am

Physical Science
A heat pump releases 103.0 kcal as it removes 54.0 kcal at the evaporator coils. How much work does this heat pump ideally accomplish? The answer should be in KJ
Thursday, September 18, 2014 at 10:13pm

science
Name a molecule that transmits energy. Answer: Energy Molecule
Thursday, September 18, 2014 at 10:11pm

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