Science

Recent Questions

Energy science
The deepest well from which water can be pumped, by creating a vacuum on the top end of the pipe, is 10 m (34 ft). In drilling for oil, wells of a mile or more in depth have to be made. From this depth, how do you think the oil is recovered? .

science
What are those

Science
An electric fence displays a warning sign about the voltage and amperage of the fence. How would amperage and voltage affect the power of the fence?

Science
How does the direction of the electric current, moving across a battery powered device, differ from the direction of travel in the AC current sent to homes and businesses

Science
Batteries are made of two metals with different electron affinities. What does the phrase “electron affinity” mean and how does this affinity affect the voltage of the battery

science help
Two scientists did the same experiment but arrived at different results. The scientists most likely did not have accurate data and information misunderstand each other's interpretations belong to different backgrounds did not have instruments to take accurate measurements

Science
The geologic time scale originally ordered Earth's rocks by: A. absolute age B. relative age*** C. composition D. decades and centuries Where did scientists originally get their information to develop the geologic time scale? A. They collected and studied rock samples in ...

natural science
Concentrated sulphuric acid is 90% of the solution it is made of and the remaining mass is water.the molarity of the 90% is 12.2M at room temperature.what is the density of this solution at room temprature

physical science
Memo of physical science question 7 November 2014 grade 11

earth science
Which of the following is a true of passive continental margins A. They generally have a deep trench B. They have a continental rise C. Crust is destroyed at their boundary D. They always have a subduction zone

maths lit,physics,life science n tourism
i don't know which career to choose can you help me ?I'm doing grade 11.

Art
how are art and conservation science connected in this sculpture? A. The artists was repurposing materials to create art B. The artists only used brand-new materials to create art. C. the artists created a piece that could not be sen by others D.The artists used chemical ...

science
What would be the volume of a gas inside a 360cm box?

science
pftba is found in extremely low concentrations (0.18 parts per trillion) but it has a great impact on climate. if pftba concentrations increase, predict what will happen to the climate

science
A motorcyclist is trying to leap across a canyon by driving horizontally off a cliff (height= 60 m) at a speed of 25 m/s. The cycle strikes a cliff on the other side (height= 30 m) at a speed of 15 m/s. Find the work done by air resistance.

science
the small piston of a hydraulic press has an area of 2.0 cm and the large piston has an area of 16 cm if the small piston has a force of 4.0 N applied to it the output force of the large piston is

Science
1) Which of the following is true about photosynthesis? A. It is an exothermic reaction B.It is a endothermic reaction ***** C.It produces carbon dioxide D. It occurs in animals 2) Atomic Theory is A.Subject to change if new information is discovered B.A solution to the ...

Science
Nothing.

Science CHECK ANSWERS! PLEASE HELP!! :(
1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body. C. A living thing dies and its skeleton is left exposed to ...

Kopanang Senior Secondary school
Am in grade 10 am doing maths literac,geograph,life science,life orientation,consumer studies,english an spedi which carrer must I take?

Science
Can a molecule be an element? Molecules of most elements are made up of only one atom of that element. So, if a molecule is what you get when any atoms join together then no, a molecule can not be an element

SCIENCE CHECK ANSWERS!!! HELP PLEASE
1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body. C. A living thing dies and its skeleton is left exposed to ...

science
Why is biological classification important?

Science
Concentrated phosphoric acid is 90% by mass and the remaining mass is water.The molarity of phosphoric acid in 90% is 12.2M at rtp. a)What is the density of the solution at rtp ? b)What volume (in mL)of this solution is needed to make a 1.00L solution of a 1.00M phosphoric ...

science
1. Name the components of the respiratory system in the order incoming air would encounter them during breathing. a.)trachea, pharynx, larynx, alveoli, bronchi b.)bronchi, larynx, alveoli, trachea, pharynx c.)larynx, trachea, bronchi, pharynx, alveoli d.)pharynx, larynx, ...

Marie Ernestine
Math/Science A car starts from rest and moves at the speed of 30 kph after half an hour. What is the cars acceleration?

Science
A student is trying to identify the different forms of energy described in the following chart: Form of Energy Description Examples Energy A energy that travels in waves through space light radio waves Energy B energy that depends on the height of an object a person at the top...

Science
1. Douglas Fir tree rings - excavated from a cave in Arizona. Date: 577 ± 50 years AD Answer: 1373 2. Wood from Egyptian coffin - from the Ptolemic period based on style. Date: 200 ± 150 years BCE Answer: 2150 3. Wood fragments from the floor of a palace in Syria - Syro-...

molate high school
im a grade 11 learner doing life science,maths literacy,geography and business studied which carrier path do i fit in

science
4. Jenny crosses 2 hybrid pea plants. What is the probability that the offspring will be short? Draw a punnett square below to solve this problem

i need help science plz hurry
Identify the choice that best completes the statement or answers the question. 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 ...

science plz help me asap
1-which of the following helps ensure a group's access to resources it needs for survival? A. courtship ritual B. Hibernation C. Conditioning D. Territorial behavior**** 2-which of the following is an example of a cooperative behavior? A. A lion hunting a zebra B. Two male ...

Science
You are creating a carbon cycle poster. which object could you add to the image as another example of combustion of fossil fuels? A. the sun B.a buzzard eating a dead animal C.a person driving a car D.a scientist digging up fossils My answer is A is that correct

science help ASAP
which of the following is not a benefit provided through social group? A. instinct to run from predators**** B. Access to mates C. protecting young D. learning to recognize predators] which of the following helps ensure a groups access to resources it needs for survival? A. ...

science help
which of the following is an example of cooperative behavior? A.a lion hunting a zebra B.two male peacock fighting over a female peacock**** C.a hyena stealing a cheetah's kill D.a blue jay calling to signal the presence of a hawk.

math
In a science experiment, the temperature of a substance is changed from 42°F to -54°F at an average rate of -12 degrees per hour. Over how many hours does the change take place? **Write as an expression and solve THANK YOU!

Science
2-abc 3-def 4-ghi 5-jkl 6-mno 7-prs 8-tuv 9-wxy 639-8667(Apple dodger) 622-4463(let it do the work) 385-2786(an important point)

science
hi. can you help me with my homework? here is my homework. How are bacteria different from protists. I hope you can help me. Have a nice night. Also, this is due tomorrow. Thank for helping me. Please answer this fast and I know you have a lot of kids to help like me. Also ...

science project
what is the control in the experiment gummy bears?

science help
Which of the following is a process that occurs only in the biosphere? condensation infiltration precipitation transpiration is it d

science help
Where does infiltration occur? in the atmosphere in the biosphere in the geosphere in the hydrosphere is it c

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromospheres Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and helium Hydrogen ...

science help
How would planting trees most affect the water cycle? decrease in evaporation increase in transpiration movement of water to new locations water pollution is it b

science help PLS
Which of the following statements about matter is false? The amount of matter increases slightly as water changes state. The amount of matter in an object remains the same during changes in state. Matter is neither created nor destroyed. Liquids, gases, and solids are all ...

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromospheres Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and helium Hydrogen ...

science
25.0 mL of an unknown HCl solution is titrated with 17.5 mL 0.100 M NaOH. What is the Molarity of the HCl solution?

Science
How do microorganisms affect the quality of soil? A. By breaking down the remains of dead organisms B. By creating tunnels C. By absorbing water D. By increasing mechanical weathering

Science
Cosmos Episode 1 Worksheet Directions: Answer the questions as you watch episode 1 of Cosmos: A Spacetime Odyssey 1. What is the name of Neil deGrasse Tyson’s “spaceship” 2. What is responsible for creating wind and keeping everything in the solar system in its clutches...

science
A 2.5L flask contains 0.25mol each of so2 and n2 gas at 27 ° c. calculate the partial pressure exerted by each gas and also the total pressure exerted by each gas and the total pressure. name the law on which it is based

Science
An experimental model rocket has a mass of 0.054kg. The fuel that was used in one test had 215J of chemical potential energy. When the rocket reached an altitude of 119m, it was travelling at 48m/s and still rising. With what efficiency did the rocket convert chemical ...

vcu
Subject: physical science, question: The density of water is p=1g/cm3. What is the mass of 2mL of water?

Science
For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, explain how this result occurs a) after removing the flask from the water bath, the experimenter cools the flask to room temperature...

math, science
An atomic force microscope cantilever, of rectangular cross section, has a length, l, of 200μm, a width, b, of 20μm and a depth, h, of 1μm. It is made of silicon nitride, which has a Young's modulus, E, of 300GPa. What is the maximum force that can be applied ...

Science
Can someone please help me with this problem? A 200-1b block rests on a horizontal plane. Find the magnitude of the force P required to give the block an acceleration of 10 ft/s2 to the right. The coefficient of friction between the block and the plane is 0.25.

liberty college
I am in grade 12 and I have taken History, matches literacy, English language/ literacy,life science, business studies and economics, what course will these subjects allow me take in university? Regards Rita.

Math Word Problem
A teacher from Anderson Middle School printed k nametags in preparation for the science fair. Half of the nametags were given out to students and 100 nametags were given out to parents. Three-fifths of the remaining nametags were given out to teachers and contests judges. How ...

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and ...

Science
How did the discovery of the electron change the atomic model? A.It disapproved the earlier idea of an invisible atom. B. It confirmed that atoms are very tiny C. it exposed fraudulent conducted by unqualified scientist D. It proved that atoms are easier to see than once ...

Science
How can you describe the location of magnesium (Mg, atomic number 12) periodic table? A. nonmetal B. metalloid C. group2, period3 D. group3, period 2 @Ms.Sue My answer is C. Can you check my answer Thank you

general physics question
Whenever I read my science textbooks, they always say that "electrons were fired" or "stream of electrons were fired to the target" during an experiment my question is, how to they generate a stream of electrons to fire in a line?? sorry if this is a dumb question, i'd just ...

Science
Which process of the carbon cycle is responsible for the release of carbon at the power plant, as shown by the arrow? A. combustion B. photosynthesis C. digestion D. decomposition @Ms.Sue can you check my answer I think the answer is A.

science-chemistry
The free energy generated by ion movement in the cell is used by the cell to do work. Compute the minimum number of millimoles of sodium that would be needed to pump one millimole of calcium ions if the following concentrations were present in the cell. Assume the temperature ...

science
Gf of H2CO3 = -616.1 KJ/mol Gf of H20 = -237.1 KJ/mol Gf of CO2 = - 394.4 KJ/mol 3. A. Carbon dioxide dissolves in water to form carbonic acid. Estimate the thermodynamic equilibrium constant for this reaction using the ΔGf° values shown here. B. Carbonic acid then ...

science-chemistry
The Ksp of mercury(II) hydroxide, Hg(OH)2, is 3.60 × 10-26. Calculate the solubility of this compound in g/L. Gf of H2CO3 = -616.1 KJ/mol Gf of H20 = -237.1 KJ/mol Gf of CO2 = - 394.4 KJ/mol 3.

science
Calculate net force when mass =2000kg, uniform velocity =60kg/hr

Physical science 9
why is the SI unit of acceleration is m/s2

science
What best accounts for the retreating of a waterfall? Only one answer is right 1) meandering stream action 2) erosion of the stream bed Is it number 1?

science
Briefly explain why potassium chloride readily disolves in water? Include a sketch of the water molecule Showing its polarity.

science
If you pour 40g of refrigerated milk (at 4 degrees C) into 200g of freshly percolated coffee (at 96 degrees C), what would the final temperature of your coffee be? Milk has a specific heat capacity of s=3.93J/g degrees C. Coffee has a specific heat capacity of s=4.18J/g ...

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’...

SCIENCE HELP
How will the spacecraft for this mission be designed? What parts are for overcoming the challenging conditions? What parts are for collecting data? What are other parts of the design? I planned to go to mercury- what do I put:(((

Science
what are some tools used to collect data in space?

science
International efforts are being made to safeguard against the misuse of weather modification. An example of the potential to "misuse" the weather is 2)creating droughts or floods for military purposes 4)modifying jungle environments to accommodate transportation needs

science
What best accounts for the retreating of a waterfall? Only one answer is right 1) meandering stream action 2) erosion of the stream bed

Science/Math
If the air temperature is 30 degrees C and the relative humidity is 60%, will the dew point be reached if the temperature drops to 25 degrees C? I know that the formula is x = .60(37g/m cubed.)

Science - Mercury
So I'm in the middle of working on a science portfolio and it says: How will you overcome these challenges with the design of your spacecraft? you see I'm planning my own mission to space and I'm traveling to mercury, but I don't know how my spacecraft should overcome the ...

Science-Please Help!!!
Which of the following systems is not directly involved in the body's regulation of water. a. digestive b. muscular c. urinary d. integumentary

science
What best accounts for the retreating of a waterfall? 1) meandering stream action 2) erosion of the stream bed

Science
Chemicals used to kill bacteria on living things are. Saprophytes Antiseptics or Postulates

Science
True/false does Venus spin counter clockwise? Answer:_______;)

science
will the air above a surface that has a high albedo be warmer or cooler than the air above a surface that has a low albedo? Low.

Physical science
A 1.2 kg metal head of a geology hammer strikes a solid rock with a speed of 5.7 m/s. Assuming all the energy is retained by the hammer head, how much will it's temperature increase? C= .11 kcal/kgC I already set up the problem. But I keep getting the wrong answer. I have : ...

earth science
briefly explain how earths atmosphere heated? Energy is transferred between the earth's surface and the atmosphere via conduction, convection, and radiation. Conduction is the process by which heat energy is transmitted through contact with neighboring molecules

Science Ms. Sue Please
1. The human endocrine system is made up of which of the following structures? (1 point) vessels receptors glands * chambers 2. Which of the following best describes the function of the endocrine system? (1 point) It secretes chemical messengers that travel through the blood ...

Science
1. The human endocrine system is made up of which of the following structures? (1 point) vessels receptors glands * chambers 2. Which of the following best describes the function of the endocrine system? (1 point) It secretes chemical messengers that travel through the blood ...

SCIENCE
NEAR POINT OF A HYPERMETROPIC EYE IS Im.WHAT IS NATURE AND POWER IF LENS? ANSWER IS 3 D.MY ANSWER IS 5D

science
Earth titled axis affects the strength of sunlight in different places of earth's surface. If you are in an area that receiving less direct sunlight,where are you located? a) near the equator b) near the north pole c) near the south pole d) near the north or south pole*** ...

science
erosion and weathering are examples of which types of forces? A constructive forces B destructive forces***** C gravitational forces D inertia-related forces please check my answer

Science Help 1 question
Which of the following is most likely an example of predator adaption? A. Warning Coloration B. Keen eyesight C. Thick body armor D. Spines My answer is Warning Coloration

science
if moon goes away, what would happen to the earth? if you drop a ball 3 meters and it bounds 1/2 seconds, what would happen on the moon?

science
if a ball falls 3 meter and bounds 1/2 seconds on the earth, what would happen on the moon if the same happened?

Science and Outerspace
Just out of curiosity, If some one were to take a journey to Jupiter, what do you think would be the social benefits?

Science
Which piece of children’s’ playground equipment could be used to model and explain the movement of matter in the biosphere? (1 point) slide merry-go-round*** swing seesaw

science
a target t lies flat on the ground 3m from the side of a building that is 10m tall, as shown above. a student rolls a ball off the horizontal speed with which the ball must leave the roof if it is to strike the target moest nearly?

Science - N Cycle Management
Consider a heavily grazed pasture of fescue grass mixed with clover (clover is a legume) on a spring day. Assume it has not rained for several days and the soil has drained below field capacity. (Remember that cattle not only consume grass, but also destroy some by walking on ...

Science - N Cycle Management
Consider a corn field in the spring at the end of April. The field has been heavily tilled in the fall and all residues have been incorporated in the soil, and are decomposed by this time. Chemical fertilizer (an inorganic fertilizer with only nitrate nitrogen - NO3) has been ...

science
what is the density of an object with a mass of 60g and a volume of 2cm cubed

Science
An object has more momentum if it has which of the following? a. a large mass and low velocity b. a high velocity and a small mass <- c. A high velocity and a large mass d. a low velocity and small mass

Science
a horse runs with an initial velocity of 11m/s and slows to 5.2 m/s over a time interval of 3.1 s what is the horse's average acceleration

Science
How are the processes of natural selection and artificial selection similar? How are they different? (Make sure to include 2 similarities and 2 differences, along with an explanation for each)

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