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Science
This is part two of my science I answered the other one just need to be checked on this one and the other one. 10. _________ is the most plentiful fossil fuel in the United States A:Natural Gas B:Coal C:Oil D:Petroleum 11. What is the result of fossil fuels being used more ...

Science
A+force+of+12+N+pulls+a+block+of+mass+3.​5kg+through+a+rope+of+mass+0.5kg.+The+bl​ock+is+resting+on+a+horizontal+frictionl​ess+surface.+what+is+the+force+of+reacti​on+exerted+by+the+block+on+the+rope

Science - physics
If you had to send your laser around a wide corner, which type of mirror could help? Briefly explain how it may help I think this one is a concave mirror

physics (science)
A body travels from rest with acceleration 8m/s square . Find its velocity when it has covered a distance of 100m

Physical science
If you use a 29m second-class lever to lift a 1000 N load exactly in the middle of the lever, and you lift the lever 1.5m high, how high do you lift the load?

Science
5. Name two ways in which a large cell can minimize the negative effects of its size. -They can minimize their size by cell division. -???????? I cannot find this answer in my textbook. Can someone please help me?

physical science
The gas in a cylinder has a volume of 3 liters at a pressure of 106 kPa. The pressure of the gas is increased to 208 kPa. Assuming the temperature remains constant, what would the new volume be? = ....L?

science
Describe how the kinetic energy of the molecules affects an object's total thermal energy.

Computer Science
When is software described as open source

physical science
If the mass of a material is 99 grams and the volume of the material is 22 cm3, what would the density of the material be? (in g/cm3) i don't know how to find the answer.

Science
Write a short essay in which you create an analogy to describe particle motion. Compare the movements and positions of people dancing with the motions of water molecules in liquid water and in water vapor.

HELP SCIENCE
Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically through the center ...

science
i just some science questions but there not for school. 1. five volcanic eruptions and what are the locations of these eruptions. Did they occur in the middle of a plate or near a plate boundary? What were the effects of these eruptions on the surrounding environment?

science
i just some science questions but there not for school. 1. five volcanic eruptions and what are the locations of these eruptions. Did they occur in the middle of a plate or near a plate boundary? What were the effects of these eruptions on the surrounding environment?

Science
What do bone marrow and epidermis have in common. A.they are both sites of new cell information B.they both contain structures that assist the body in cooling down if overheating occurs. C.they both contain or are associated with sensory neorons D.they are both involved in ...

science
If your rock sample has 10 grams, how many grams of quartz does it contain

9th grade physical science
I'm really confused on how to do this, Can someone help walk me through? An object is placed in front of a concave mirror as shown in the diagram below. A. Draw at least two rays that demonstrate how this mirror produces an image. (4 points) Image B. Describe the image formed ...

Maths science his french
Critical angle of a material to air is 30 degree then the refractive index of material will be

Science
How much energy is needed to convert 10kg of ice at -15 degrees centigrade to 125 degrees centigrade of steam? Express your answer in joules.

science
what fabric is a good heat conductor? or what material other than metals are good heat conductors?

Science
How much energy is needed to convert 10kg of ice at -15 degrees centigrade to 125 degrees centigrade of steam? Express your answer in joules.

Science
What net force is required to accelerate a roller coaster car that has a mass of 300 kg at Disney world at a rate of 8 m/s2 ?

Science
How much you would weigh on the moon if you are 72 pounds on Earth

Science
Every year Eli and his family visit Great sand dunes desert in Colorado. Elliott notices that more dunes with varied shapes and sizes appear each year. Explain what causes this phenomenon. Help! I know that the wind is always different and that causes erosion.

science
How do scientists explain the fact that some landforms that are far apart and separated by oceans appear to be related?

Science
Carla applied a force of 35 N to a wheelbarrow full of bricks and moved it 2.5 m. Which of the following can be determined from this information? The wheelbarrow supplied 87.5 J of work. The wheelbarrow has a mechanical advantage of 14. The wheelbarrow is 7 percent efficient. ...

science
what is the specific heat of aluminum if temperature of a 28.4g sample of aluminum is increased by 8.1 c° when 207J og heat is added

Science
Each heating element has a resistance of 5 Ω. The current passing through each element is 0.4. Calculate the total resistance of the six heating elements.

science
53.94 g of a substance of molecular mass 182 is dissolved in 1000g of water at this temperature.the vapour presser of water is 17.5 mmhg .calculate the vapour presser of this dilute solution

Science 6
In an island ecosystem, Fox and Skunks both hunt mice and toads. Which of the following correctly describes some of these relationships? A:Skunks and mice have a competitive relationship. B:Skunks and toads have a predator-prey relationship. C:Fox and Skunks have a predator-...

Science
1.which of the following species contains a similar oxidation state as in C of CH2O? CO32- , SO32- CO ,N2O,NO2_

Science
Which of the following could be true of two different species that have a competitive relationship in the same ecosystem? A: one species preys on the other B:they share the same niche C:one species benefits while the other is neither helped or harmed

science connexus
1.How is kudzu an environmental issue for Georgia A.kudzu can be easily removed B.kudzu can help other plants grow C.kudzu can be used to make medicine D.kudzu can destroy native forest habitats ***** 2.forest and fisheries are an example of A. abiotic factors B.energy factors...

Science
What acceleration does a 40 slug object acquired when 500 lbs force act on it

Science 8 A
5. Which of the following types of pollution cannot be attributed to car and truck emissions? A. Acid rain B. Sedimentation C. Ozone D. Photochemical smog I think it is Ozone.

science
how high a cube of wood would float in water if it was 1/4 the density of that water.

5th grade Science
How does water tempurature give a clue about what ocean layer it belongs to? (Please help!)

Science
A forrestry crane is lifting vertically a 2 tons log with a force F = ( 9 + 2 h) where h is the height. Draw the free body diagram with the forces and use work and energy conservation to determine the speed of the log when it has risen h=6m. Apply kinematics to give the ...

Science
1.In which temperature of water did the food coloring diffuse faster? 2.Using your knowledge of the motion of molecules, explain the results. I'm doing a discussion and I need help, can someone help me please and thank-you :)

Science-y Math-y Stuff
A machine with 80% efficiency does 4,000 J of work. Using the machine how much work did you do? NEED HELP! PLZ REPLY SOON

science
Explain how a mutation in an individual's DNA occurs, and describe the effect it may have on the individual's traits.

Science
What Is lever.

Science
The Speed Of A Train Is Reduced From 80km/h to 40km/h In A Distance Of 500m On Applying The Brakes Calculate (I) How Much Further Will The Train Travel Before Coming To Rest (II) Assuming The Retardation Remain Constant,how Long Will It Take To Bring The Train To Rest After ...

political science
1) Scenario: The President appoints Dan Evans to Senator Adams' seat when Adams resigns due to a personal scandal. This scenario is: a) Constitutional, because it is within the President’s powers to appoint Senators when one dies or resigns in the middle of his/her term. b) ...

Math
A science class has 3 girls and 7 boys in the seventh grade and 5 girls and 5 boysin the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students she selects are both girls?

Math
A science class has 3 girls and 7 boys in the seventh grade and 5 girls and 5 boysin the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the class for a competition. What is the probability that the students she selects are both girls?

science
Calculate the molarity of 500 ml of a solution containing 100 grams of glucose (C6H12O6).

science
Please help!! Methylamine has a vapor pressure of 344 torr at -25∘C and a boiling point of -6.4∘C . Find ΔHvap for methylamine. I know that ln(P1/P2)=(ΔHvap/R)(1/T2-1/T1) but it doesn't indicate whether the boiling point is the "normal boiling point". Am I on the right ...

Science
True or False 1) All living things must eat other living things for food. 2) Plants can make their own food. 3) Plants don't need oxygen, only carbon dioxide. 4) Animals eat plants or other animals that eat plants. 5) Many living things need oxygen to release energy from food...

art
i need help which of the following most influences the art of tessellations a. language arts b. social studies c. science d. mathematics please someone help im really confused

Science
If you have 10 grams of water and you add 5 grams to it how much salt water do you have?

Science
How does increase of oxygen in wetlands affect the small fish and wading birds?

Science
A scientist is studying a plant species in which the flower color genes are codiminant. The scientists crosses a plant with red flowers. The offspring will most likely have A. Red flowers B. White flowers C. Pink flowers D. Red flowers with white patches

Science
what types of wave are gererated by earthquakes?

Science
A 1750 kg van is travelling down a 10 degrees inclined road at a speed of 6 m/s. If the driver brakes suddenly causing the wheels to lock, determine the distance L his tyres will skid on the road. The coefficient of kinetic friction between the wheels and the road is k=0.5...

Science physics
what will be the acceleration due to gravity at up planet whose mass is 8 times the mass of the earth and whose radius is twice that of the earth? g=10

science
What type of rock forms when igneous rock is weathered and eroded?

science
A 12m tall tree to be photographs with pin hole camera it is situated 15 m away from camera how far should screen place from pin hole camera to obtain 15m tall image of tree

Science
I need help on this fill in the blank science question for my study guide on Cellular Respiration "More active cells need more ______ to release more _______"

Science
You are pushing a friend on a sled. You push with a force of 20N. Your friend and the sled together have a mass of 60kg. Ignoring friction, what is the acceleration of your friend on the sled?

Science
What is equation between ethanethiol and methoxide ion?

Science
Which statement best describes a spring tide? A - The periodic rise and fall of the water level in the oceans B - the tide if maximum range that takes place two times a month C - the difference in levels of ocean water at high tide and at low tide D - a rise in ocean water ...

Science
Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically through the center ...

Science
Cassie is writing an equation to show the effect of gravitational pull of the sun and moon on tidal range which equation would Cassie use to show the effect of the sun and the moon on Spring tides? A - sun + moon = spring tides B - sun + Earth = spring tides C - moon - sun = ...

Kumar
What is science?

Science
Cassie is writing an equation to show the effect of gravitational pull of the sun and moon on tidal range which equation would Cassie use to show the effect of the sun and the moon on Spring tides? A - sun + moon = spring tides B - sun + Earth = spring tides C - moon - sun = ...

Science
Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically through the center ...

Science
Which statement best describes a spring tide? A - The periodic rise and fall of the water level in the oceans B - the tide if maximum range that takes place two times a month C - the difference in levels of ocean water at high tide and at low tide D - a rise in ocean water ...

science
How many grams of sodium hydroxide is required to neutralize 73 grams of hydrochloric acid and to from sodium chloride and water

Science
The Northern Hemisphere recives more solar energy during one half of the year than it does during the other half of the year. Which of the following happens during the year to explain this? A - the distance of the northern hemisphere from the sun changes B - The Angle at which...

science
Na2Co3 has a mass of 2.25 grams determine the Na ions present

General
What can you say about the situation of science?

Science
Ms.Sue can you hit me with a few questions and answers for studying

Science
A car is moving from rest .After 10 sec its wheel rotate 360 times in 1 minute. If the radius of the wheel is 50 cm, then find (1) angular acceleration and (2) angular velocity after 30 sec

science
how do altitude and latitude affect desert climate

Science
the amount of pollution produced by cars was measured for cars using gasoline containing different amounts of lead. What is the independent variable

Algebra
My science class is pretty small. There are just 18 students in the class. My teacher, Mr. Burnett, has an unusual system for picking lab partners. He has given each student a number from 1 to 18, and on lab days, he pulls two numbers out of a bag to match people up. During ...

Science
To become more stable an atom that has two electrons in its outer energy level will gain two electrons A.) True B.) False That false correct?

Science HELP PLZZZ
What Environmental Pressures Exsists Now That May Be Shaping The Human Species. PLEASE HELP THANK YOUU

Science
I have been thinking about this and really cannot think of a good answer plz help. What environmental pressures in the past do you think we're most important in shaping the human species as it is today? Thank you!

science
A car slows down from a speed of 20m/s to rest in 25 seconds.Find its acceleration.

Science
Where can I find a pie chart that shows the percentage of resources used to generate electricity in the United States in 2015?

Science
Describe the flow of blood to the human body, including through each of the four chambers of the heart. Explain how the blood changes as it moves through the various locations in the body.

Science
The force of gravity on an object on the surface of Mars is less than the force of gravity on an identical object on the surface of Earth. Which of the following explains why this is true?

science
I need help planning a space trip

Science
What is the result of c6h5ch2cooh +H^+/KMnO4

Science physics
How would the voltage output be affected if the armature is made to spin faster?

Science
A solution has been prepared by dissolving 0.63 g of HNO3 in 100 ml.What is its pH value ?

Science
Which pair of states is most likeley to have a similar climate? Oregón arizona? Virginia and North dokota? Ohio and florida? Kansas and missouri?

science
i need a acrostic poem for the word eukaryotic

Science
Bb is an example of an organism's ______. "Bb" is from Punnett square

Science, please help!!
I only have two questions, thank you! One difference between a point mutation and a chromosomal mutation is that ____ A. A point mutation affects the DNA of more genes than a chromosomal mutation B. A point mutation can involve a insertion or deletion, but cannot result in a ...

Science
Recall from previous activities in this lesson which era is sometimes referred to as the Age of Mammals. Locate and click on this section of the geologic time scale, and list the other possible names that could have been used to describe this era, and why.

Science
Place the following words into the illustration below : gametes, sporophyte, gametomphyte, and zygote. explain how the terms are related

Science
Write the ionic equation for dissolution and the Ksp expression for PbC12.

Science
I can dispense 300 liters of liquid continuously in one hour from a given temp. of 22*c down to 7*c. (delta T=15) How many liters and in what time can I dispense from a temp. of 24*c down to 3*c ? (delia T=21)

science
What process forms high non-volcanic mountain ranges? A. One tectonic plate is splitting apart into two plates. B. Two tectonic plates are colliding and pushing together. C.One tectonic plate is sliding past another tectonic plate. D. Two tectonic plates are colliding and one...

Science
1) What physical features do producers and consumers have to help them survive in their environment

Science
why are lunar rocks used to determine the age of a earth.

Science
What are examples of first, second and third level consumers in the Chesapeake Bay?

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