Science

Recent Questions

science
2) Which is not an example of matter? A. water B. air(i think it this one) C. gold D. sound 3) The amount of space an object occupies is called its ..... A. volume(i think it this one) B. mass C. electricity D. gravity 4) Atoms in a molecule are joined together by.. A. ...

Science
Pure gold can be fashioned into elaborate masks and thin plates that can be incorporated into clothing.what physical trait of metal doea this demosnstrate

Science
When magnesium oxide (MgO) and water (H20)react, they produce magnesium hydroxide Mg(OH)2. Magnesium hydroxide is a medicine used to treat an upset stomach. The equation for this chemical change is shown below: MgO + H20 --> Mg(OH)2 if 40.00 grams of magnesium oxide and 18....

Science
Name two functions of a nucleus. [I think one of them is that it contains the cell's DNA.]

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.

Science Help
Drew is walking back up the best hill in the neighborhood 24* grade. He's pulling on the empty 2.1kg sled with a force of 18N at an angle of 55* with the hill. He's walking with a constant velocity, what is the coefficient of friction?

science
a 150 gram bullet is fired with a speed of 50 ms if it is stopped after hitting a target 101 meters away what is its initial KE

science: question
is autoclaving same as heating the tooth?

Science Project: Teeth (PLEASE HELP)
How hot should water be for teeth to stay in for 30 minutes? I don't have any equipments to heat the teeth and I have check the hospital and have asked my mom.She works in the hospital there and she says they have one in the lab and I can't use it anyway. I'm planning to boil ...

math
A total of 121 people came to the school science fair this year. This is 7 more than twice the number of people who came to last years science fair. How many people came last year?

Science
I have to write an argument date why the adaptation of camouflage helps a predator more than it helps a prey animal and I have to have 3 valid points. What is a good website to research this?

Science tech
What do bridges and buildings have in common ?

Science
Bird. Trait Hummingbird Wings: Legs: Beak: Body: Penguin. .Wings: Legs: Beak: Body: why it might be beneficial for different types of birds to have different types of bodies

Science
Liquid A=0.68 g/ml Liquid B=0.76 g/ml Liquid C=1.00 g/ml Liquid D=1.08 g/ml A new liquid with a density of 0.97 g/ml is poured into a graduate cylinder. Where would it layer in relationship to the other liquids?

science
Lava flows from cracks in the earth and hardens into basalt, what type of rock result, is the answer sedimentary

science
Heat and pressure change rock inside the earth crust into gneiss. What type of rock result. Is the answer igneous

science
Pressure changes layers of mud into shale. What type of rock is the answer sedimentary

science
Some people that suffers from clinical depression experience feelings of tiredness and feel the need to sleep much more than usual. a. How and why is feeling of tiredness and lethargy connected to depression? b. Is it better to fight off the feeling of tiredness and sleepiness...

science
Sandstone is exposed to extreme heat and pressure changing into quartzite. What type of rock. Is it metamorphic rock

science
Layers of mud made mostly of tiny shells and calcite crystals form the soft rock chalk. What type of rock results. Is the answer igneous rock

science
By studing rock layer scientist can learn about changes in earth formation and climate. True or false. Is the anser true

science
The remain of long dead organism may form fossils, true or false. Is the answer true

Science
Swimmers find that they can float more easily in the ocean than in freshwater pond. Explain the reason for this phenomenon

Physical Science
Fill in the blanks using the correct term from the list below. Active Combustion free heating systems passive heat pump thermal energy stroke 1. A house with large windows on its south side and few windows on its other sides probably uses a(n) Blank solar heating system. 2....

Pysical Science
The transfer of thermal energy by convention and conduction both require what? Unscramble atterm

science
how much force is used when a 3.00 km object is moved by 51.0 kj of work?

science
why did a portion of the tabletop get cold when Natasha placed her cold drink on the table. a.the table's molecules were vibrating more slowly in that area b.the table's have spread farther apart in that area c.the table's had gained energy in that area d.(this is blank ...

Science
Calculate the denstiy of a block if the volume is 20.0cm3 and the mass is 40.0 g

Computer science
How can i use the 'Adobe Photoshop'? I am really confused how to use/edit a photo. Will ypu pls help me to know about it? Thank you

moral science
UNSCRABLE THESE WORD..ineisfsirdne; htotvulfhgrsen

Introductory to Physical Science
A student drops a stopper into 50.0mL of water and the level rises to to 56.1mL. If she submerges the same stopper into a cylinder of thick syrup, what will happen to the syrup? a.) it will rise 6.1mL b.) it will rise less than 6.1mL c.) it will rise greater than 6.1mL d.) it'...

Science/Math
If a student submerges a stopper with a volume of 6.1mL into a cylinder of thick syrup, what will happen to the syrup?

Science
What is a black dwarf, white dwarf, protostar, neutron star and black hole

science
who discover neon

science
In electromagnetic waves, frequency is inversely proportional to Fast Please. I do not understand this

science
how many h2 can be produced by 9.2 gr with h2o

Science Please help
Some of the oldest rocks ever found have been estimated to be about 3.5 billion years old. Is it likely that these rocks were present when Earth was first formed? No, this rock is probably just a sedimentary rock that was formed by much younger igneous rocks. Yes, the oldest ...

Physical Science
What is the temperature of oxygen that boils at negative 183 Celsius?

Science
How many families of elements are there Is there 9

Science
What is a species that competes with polar bears for resources?

science
a pipe that carries 10 gpm of liquid at 50 psi with at least 0.5 sq in area must fit through a hole that's 1.25 in in diameter.

Science
How many families of elements are there

Science
How to find valence electrons

Science
What are the names of the periods on a Periodic Table

science
Oxygen gas may be prepared by decomposing hydrogen peroxide, h2o2, using manganese (IV) oxide catalyst: 2H2O2(liquid) ----> 2H2O(liquid) + O2(gas) Calculate the amount of oxygen that will be produced from 1.35 moles of H2O2 Determine the mass of oxygen gas that can be ...

Science
A geologist working in a national park finds a minerals. He is carrying a kit that contains a penny, a hand lens, a piece of tile, a geologic hammer, and a jackknife. Describe the geologist can use these items to determine some of the minerals characteristic.

science
A 7E+3 kg object is 9.29 m away from a 4.7E+8 kg object. What is the gravitational force between the two objects?

Science
A geologist working in a national park finds a mineral. He is carrying a kit that contains a penny, a hand lens, a piece of tile, a geologic hammer, and a jackknife. Describe how the geologist can use items to determine some of the mineral's characteristics? Help............. ...

science
Baseball of 0.15 kg is thrown upward at an initial velocity of 35 m/s . tow seconds later a 20 g bullet is fired at 250 m/s into the rising baseball . How high will the combined bullet and baseball rise

Science
What will be the effect on litmus paper when methyl amine is used?

science
A 170g mass attached to a horizontal spring oscillates at a frequency of 3.10Hz . At t =0s, the mass is at x= 6.60cm and has vx = − 15.0cm/s. Determine the position at t= 5.00s. The period is 0.32258 s The angular frequency is 19.478 rad/s The amplitude is 6.6448×10^&#...

Science
Baseball of 0.15 kg is thrown upward at an initial velocity of 35 m/s . tow seconds later a 20 g bullet is fired at 250 m/s into the rising baseball . How high will the combined bullet and baseball rise.

m
For a preschool plan can you have a science activity for each day?

science
a 25 kg ball is trown into that air.when thrown it is going 10 m/s .calculate how high it travel

science
type of element of elements of neon

Science
A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials’ boat pulls up next to the spy’s boat, both boats reach the edge of a 4.6 m waterfall. The spy’s speed is 16 m/s and the officials’ speed is 26 m/s. How ...

Science
Which of the following describes the fundamental difference between prokaryotic and eukaryotic cells?

science
the constant value for speed of light is 3x10to the 7 m/sec. what is the mass equivalent of 100000 N-m of energy

science Please Help
1. A positively charged test object is moving toward the positive source charge in an electric field. What happens next??? A. its potential energy decreases. B. Its potential energy increases. C. Its potential energy stays the same. D. Its potential energy become the negative...

science Please Help
During the process of photosynthesis, plants convert carbon dioxide and water into glucose. Covalent bonds hold the glucose molecules together. The breaking of the covalent bonds during digestion releases energy. the type of energy released is A.nuclear energy B.kinetic energy...

Science
If the original pressure of a system is 700 torr, temp 30 C and volume 100L, what will the final volume be if the pressure is increased to 750 torr and temperature to 37C

7th grade science
some animals, but not humans have an organ called a gizzard located near the top of their digestive tract. this organ is small and can contain small rocks. it also has thick muscular walls. based on this physical description which of the following is most likely to be the ...

Science
a ball with a mass of 1.50 kg traveling + 2.00 m/s collides with a stationary ball with a mass of 1.00 kg. After the collision, the velocity of the 1.50 kg ball is + 0.40 m/s. What is the velocity of the 1.00 kg ball after the collision?

Science
A mass of .1539 kg. moves down a 5 meter ramp in 2 seconds. What is the velocity and the KE developed by the moving mass?

science
which of the following features is most associated with the inner planets? A. rings made of ice and dust B lots of moons C large amounts of iron and silicon D thick atmospheres is it c or d?

Science
in what way are burning and the formation of rust alike?

science
which of the following features is associated with the inner planets? rings made of ice and dust lots of moons large amounts of iron and silicon thick atmospheres

Science
Which of the following is a quantitative property of minerals? A.Cleavage B.Hardness C.Luster D.Streak I'm thing Cleavage or Hardness but i'm not sure can someone help?

science
A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a mass-spring system, greatly increasing efficiency. Normally, the jellyfish emits one jet right after the ...

Science
The Ka for the H2PO4–/HPO42– buffer is given by the equation: Ka= ([HPO4^-2]gamma [H^+])/[H2PO4^-]=10^-7.20 What is the pH of a 2:3 mixture of H2PO4– to HPO42– at 0.10 M ionic strength? (See the table for the activity coefficients.) I just am not sure how to figure out...

Science
Polysaccharides break apart by the process of hydrolysis and need _________ for this process. Can you please help me fill in the blank.

Science
If a cheetah is able to accelerate at 15.0 m/s2 from a stand still, what speed will it reach after 2.50 seconds?

English
(1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught seventh-grade science, I have some experience with the faces and attitudes of ...

science
Discuss the results of your research about the roles of nature versus nurture on human health. Share your opinion about how an individual’s genetic makeup interacts with nutrition, smoking, drug use, or exercise to affect the quality and length of life. Back up your opinion ...

Science
What is the total mass when you pour 100 g of vinegar into a flask and add 10 g of baking soda in a flask. Also what is the chemical formula for this. how can we change the formula so the experiment will be accurate. Thanks

Science
How can I create a story of how my " constellation is formed? '' My teacher gave me this assignment. I have to create my own " Name" constellation, in this case its petasus because according to the chart I placed the dots down and it formed a hat. In latin, I named it Petasus...

Science
Scorpius is one of the oldest constellations known - possibly even one of the original six signs of the zodiac. The constellation was once much larger, but the western portion representing the claws of the scorpion was given to Libra. Is this considered the constellation's ...

Science Help!!!!
What form of pollution, if any, does energy source cause? My answer Air pollution?

science
how many seconds would it takes a boat to accelerate from 13m/s to 20m/s over a distance of 1.25 km ?

Science
make a paragraph about your favorite thing about winter? someone please help

Earth Science
Which of the following statements correctly describes the asthenosphere? 1- it is thin cold and rigid layer 2- it is the source of the earth's heat 3- it permits plate motion 4- it occurs only near subduction zones My answer is 1

science
Sarah wants to use a model to get an idea of how far away the stars are. She uses a marble to represent the Earth, and she places a basketball 1 m away to represent the Sun, which is the nearest star. If Sarah wishes to keep the distances between objects in her model at an ...

science
after a rock layer is eroded, whick additional event must occur to create and unconformity, or a gap , in the geologic record

Science one question!
Explain how gravitational, electrical and magnetic force act on a maglev train? I just need help on magnetic thanks!

history..maths litercy..geography..life science..isizulu..life orentation..
im doing grade 11 and next year im doing grade12 so my question is that i want to be a boilermaker and i want to work in sasol so i don't know if this sbject is right to do boilermaker if you have any information please contact me on 0736124260 or 0739615308 in june exam my ...

Science Please Help
Which of the following is a testable hypothesis? A. Altered temperature may affect gas production, which measures fermentation rate. B. Does temperature affect fermentation? C. Temperature decreases will affect gas production and fermentation much of the time. D. If ...

Science Please Help
Which of the following is a testable hypothesis? A. Altered temperature may affect gas production, which measures fermentation rate. B. Does temperature affect fermentation? C. Temperature decreases will affect gas production and fermentation much of the time. D. If ...

language arts
When Louise Meyer was five years old, her mother took her to a science museum. That day, young Louise encountered her first snakes, and she's been fascinated with the reptiles ever since. Meyer now breeds snakes for educational programs. She takes her slinky friends to schools...

Science
Both a father and mother have dimples. Their son has dimples, but their daughter does not. Which genes, DD, Dd, or dd, does each family member have? Father and Mother= DD Son= Dd Daughter=dd

Language Arts
When Louis Meyer was five years old, her mother took her to a science museum. That day, young Louis encountered her first snakes, and she's be fascinated with the reptiles ever since. Meyer now breeds snakes for educational programs. She takes her slinky friends to schools, ...

Language Arts
When Louis Meyer was five years old, her mother took her to a science museum. That day, young Louis encountered her first snakes, and she's be fascinated with the reptiles ever since. Meyer now breeds snakes for educational programs. She takes her slinky friends to schools, ...

science
What is the difference between sexual reproduction and asexual reproduction?

Science
Suppose that you heated a sample of a hydrated ionic compound in a test tube. What might you expect to see inside the test tube, near the top of the test tube? Explain please i really am stumped on this question...

Science IPS
A mass of 10 g of sodium nitrate is dissolved in 10cm3 of water at 80 degrees (c). As the solution is cooled, at what temperature will a precipitate first appear?

science
A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a mass-spring system, greatly increasing efficiency. Normally, the jellyfish emits one jet right after the ...

science
can we predict when a hurricane will occur? explain. I have tried so man website and still no answer.. please help

science
when do huricanes happen??

Science
~~~~~~~~~~~~~~~~~~~~~~~~~Choices *Extra Words In The Word Box (Will Be Leftovers)* -Landfills -Limiting Factor -Non~point Source -Habitat Destruction -Stop -Migration -Biodiversity -Carbon Dioxide -Reverse -Carrying Capacity -Commensalism -Selective Cutting -Extinction -...

science
Wood fragments from the floor of a palace in Syria - Syro-Hittite period. Date: 675 ± 50 years BCE?

science
An electron of mass 9.11 × 10-31 kg and charge 1.6 × 10-19 C passes through a cathode ray tube with a velocity of 3.7 × 107 m/s. It enters a magnetic field of flux density 0.47 mT at a right angle. What is the radius of curvature of the path in the magnetic field?

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