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Recent Science Questions

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

Science
Two birds collide in midair. Before the collision, their combined momentum was 88 kg•m/s to the west. What is their combined momentum after the collision? A. 88 kg•m/s east B. 88 g•m/s north C. 88 kg•m/s down D. 88 kg•m/s west

science double check answers
1.Asteroids in our solar system are a)planets b)comet remains c)found in an asteroid belt** d)pieces of ice 2.Which of the following would not be found on the electromagnetic spectrum? A)The wavelengths of electromagnetic radiation B)The frequency of electromagnetic radiation ...

science
A 33.1 kg crate rests on a horizontal floor, and a 69.0 kg person is standing on the crate. Determine the magnitude of the normal force that the floor exerts on the crate.

Science PLEASE HELP
Explain how gravitational, electrical and magnetic force act on a maglev train?

Science. Answer Check
A kitchen ceiling light has five light bulbs on it. When one of the lights goes out, the other four bulbs stay lit. This is an example of a series circuit. True*** False

Science. Answer Check
1. A student studying a circuit diagram of a lightbulb, battery, and a switch correctly identifies it as a closer circuit. In this diagram, The lightbulb would be a. an insulator b. on*** c. disconnected d. off 2. The focus of gravity on an object on the surface of Mars is ...

Science
The ratio of mass of hydrogen to mass of oxygen in water is 1:4. How much oxygen will there be in 80g of water

Nature Science
If a typhoon hits an island without any person, is that a disaster?

science
an object of size 3cm is placed at a distance of 15cm from a convex lens of focal length 10cm calculate the distance and size of image so formed what will be nature of image?

Science
What kind of heat transfer cause Earth's major wind patterns?

Pre Algebra Review
Thirty-five students belong to the science club. This 1/4 the number in the 5 sections of the eighth grade. How many students are in the eight grade? How many in each section if each section has the same number of students?

Science
A boy pushes a box of mass 57 kg and it moves with an acceleration of 11.4 m/s2. what amount of force is the boy exerting on the box?

science
SHC and heat transfer Iron=390 To raise temperature of 0.5kg iron from 22 to 34°c

Science
Explain the way that ammonia, salt, and water are a like. My answer: They are all a like because they are all acids. They all clean things. They also are all compounds.

Science
What volume of a 2.00 M HCL solution can be prepared by diluting 0.350L of 14.0 M HCl solution?

science
Gravitational force =mass x 9.8m/s2 what is the force of a polar bear weighing 1500kg?

Science Physics
I don't understand how I would know what would happen if it collided or bounced, etc. How do I solve a question like this? Suppose the total momentum of two masses before collision is 100kg m/s. What is the total momentum of the two masses after they collide? 0 kg m/s 50 k m/s...

science
what city goes below sea level first miami or new orleans?

Science
. What is the freezing point of a solution that contains 3.5 mol of the ionic solid BaCl2 dissolved in 500. grams water?

science
what makes us cry while chopping the onion?

enviromental science
which of these is a natural factor that affects the enviroment domestication oxygen resarch factories

8th Grade Science
Which of the following best describes what causes the phases of the moon? A. The alignment of the sun, Earth and moon (I think it's this one) B. The speed of the moon around the Earth C. The speed of the Earth around the sun D. The alignment of the planets

Compter Science ASAP please
How do you check if the words exist in the sentence in Python? So far I have got... the_sentence = ("I love chocolate and chocolate loves me") sentence = the_sentence.split() print(sentence) sentence_1 = raw_input("Enter a word") def "word": if word in the_sentence: print "Yes...

Science
A lead calorimeter with mass of 150g contains 200g of water. The calorimeter and water are in thermal equilibrium at a specific temperature. Two metallic blocks are placed into the water. One is a 50.0g piece of aluminum heated at 90 degrees celcius. The other has a mass of ...

Science
A lead calorimeter with mass of 150g contains 200g of water. The calorimeter and water are in thermal equilibrium at a specific temperature. Two metallic blocks are placed into the water. One is a 50.0g piece of aluminum heated at 90 degrees celcius. The other has a mass of ...

science
If a rope of lift breaks suddenly , the tensiin exerted by the surface of lift.

science
what is the specific gravity of a liter of water at 20 degrees celsius

science double check answers
1. What is the alignment of the Earth, moon, and sun during a lunar eclipse? A)Earth, sun, moon B)Earth, moon, sun C)Sun, Earth, moon** D)Sun, moon, Earth I know that for a lunar eclipse the earth is in the middle, so i just wanted to double check 2.A scientific law A)can have...

science
Plants perform photosynthesis and respiration. Dead plants are broken down and become part of the soil. Which of the following matter do plants help to cycle through ecosystems?

Science
1.When the effects of the moon and sun work together, this is what kind of tide? A)Neap tide B)Fall tide C)Spring tide** D)New moon tide

science
1. What is the alignment of the Earth, moon, and sun during a lunar eclipse? A)Earth, sun, moon B)Earth, moon, sun C)Sun, Earth, moon** D)Sun, moon, Earth I know that for a lunar eclipse the earth is in the middle, so i just wanted to double check 2.A scientific law A)can have...

science
What happens if someone pulls the thermometer out, leaving the mouth of the flask open

Astronomy, Math, Science
If the Sun is at 57 degrees altitude at 12:18 pm on Sept. 1, 2016 and I held a pen that is 7 inches long in the sky, how long would its shadow be?

Science
Which of the following best describes the process in which surface water becomes water vapor? A. condensation B. Precipitation C. Percolation D. Evaporation My answer A

science
Which of the following is an example of an environment pressure

SCIENCE-CHEMISTRY
Find the mass (kg) of a metallic block in the form of a cube 30cm on the side,if its density is 5.6kg/L.

Science
The engine of a motorcycle can produce a maximum acceleration 5 meters per second square. Its brakes can produce a maximum retardation 10meters per second square. What is the minimum time in which it can cover a distanceof 1.5km

Science
Solution of question The work done by the heart if it's beats 72times per minute

science
1.A scientific law A)can have only one known exception B)can have any number of exceptions as long as we know about them ** C)might have many exceptions we don’t know about D)has no exceptions 2.Sunspots are A) solar storms that can interfere with communication satellites...

Science
If you place a grape in a large amount of sugar water, what will happen to it and why?

science
1.A scientific law A)can have only one known exception B)can have any number of exceptions as long as we know about them C)might have many exceptions we don’t know about D)has no exceptions*** 2.Sunspots are A) solar storms that can interfere with communication satellites B...

Science chemistry please help
Determine the number of moles of oxygen in 1 mol of dinitrogen tetraoxide

Science chemistry
Determine the number of moles of oxygen in 1 mol of dinitrogen tetraoxide N2O4= N 2×14.01g/mol= 28.02g/mol O 4×16.00g/mol= 64.00g/mol N2O4= 92.02g/mol I can't get the right formula to solve the rest. Please help and thank you

science
I'm stuck on the following questions 1)The geocentric model of the universe states that the Earth is the center of the universe. This is an example of a A)scientific conclusion B)pseudoscience C)scientific law*** D)Scientific method Through process of elimination i know its ...

Science
Sperm and eggs are found in different parts of plant. Explain why it is important for these cells to unite and describe some factors in a environment that help unite them?

science
Take 1mL of 1M NaCl solution, and add 9mL of water. Then take 10microL of the diluted solution and add 40microL of water. What is the dilution? And what is the final concentration of NaCl? So I see how this is a 2:1 dilution, but I am having a hard time figuring out the final ...

Science
which of the following statements is true as the moon goes from new moon to full moon phase? (2 points) A:We see more of the lighted side of the moon B:We see less of the lighted side of the moon C:The time it takes to go from new moon to full moon is 2 weeks D:The time it ...

science
most of the life of a cell is spent in a period of growth and development called_____.

Science physics
A ship is heading north at 15km/h in a tide moving at 6km/h westward. Determine the magnitude and direction of the resultant velocity of the ship.

Science Physics
Derive an expression for kinetic energy of an object mass m moving with uniform velcoity v what happens to the kinetic energy of a body if its velcoity is halved

Science, physics
A ship is heading north at 15km/h in a tide moving at 6km/h westward. Determine the magnitude and direction of the resultant velocity of the ship. I can't answer it because I don't get the formula. And please give me the formula. I need the answer later. I'll wait! Thankyou in...

Science
Derive an expression for kinetic energy of an object mass m moving with uniform velcoity v what happens to the kinetic energy of a body if its velcoity is halved?

science
The apparent weight of cube in liquid with relatibe density 0.9

Engineering science
A steel cylinder contains an ideal gas at 27°C. The gauge pressure is 140kPa. If the temperature of the container increases to 79°C, what is the new gauge pressure?

Science
It takes a force of 22 N to push a 10 kg box horizontally with a constant velocity over concrete. What is the coefficient of kinetic friction between the box and the concrete? My guess is 10 kg/22 N = 0.4545 but I'm not sure if you have to take in account vertical forces or if...

science
A ray of light travelling in air strike the water surface at an angle of 40° calculate the refractive index of water if angle of refraction is 29°

Science
The lung is to the respiratory system as the ____ is to the integumentary system. A) heart B) kidney C)hand D)brain B

Science
A new geosynchronous satellite needs an orbit of 35.7 km . The mass of the Earth is 5.97x 10^24 Kg and the radius of Earth 6.4 x 10^3 km. The mass of the satellite is 200 Kg. What velocity will it need to achieve that orbit

science
what does the slope of a electric force vs. 1/R^2 graph represent?

Science
A new geosynchronous satellite needs an orbit of 35.7 km . The mass of the Earth is 5.97x 10^24 Kg and the radius of Earth 6.4 x 10^3 km. The mass of the satellite is 200 Kg. What velocity will it need to achieve that orbit?

Science
The Sun exerts a gravitational force of 3.56 x 10^22 N on Earth. The mass of the Sun is 2.0 x 10^30 kg. The mass of the Earth is 6.0 x 10^24 kg. If we assume the Earth has a circular orbit of 1.5 x 10^11 m, what is the velocity needed for Earth to remain in orbit?

Science
A car completes a half of a circular track that has a radius of 10 m. What is the distance traveled by the car? What is the displacement of the car?

Science , Biology
Which creatures live on the energy of the Sun? Angel fish Suquirrel fish Sea urchins Porcupine fish Octopus

Science , Biology
Is Atlantic spadefish Nocturnal or Diurnal? Carnivore, Herbivore, Autotroph? Is Porcupine fish Carnivore, Herbivore, Autotroph? Please give me informationsss!!

science
In the following equation , 417.96 g of Bi reacts completely with 200 g of F . How many grams of BIF (to the third power) are formed?

Science
Take 1mL of 1M NaCl solution, and add 9mL of water. Then take 10microL of the diluted solution and add 40microL of water. What is the dilution? And what is the final concentration of NaCl? So I see how this is a 2:1 dilution, but I am having a hard time figuring out the final ...

science (ASAP)
what does the notation TT mean to genetics

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

science
in evolutionaly terms, RNA is though to have preceded proteins and DNA.

science
A car is moving at a speed of 72 km/hr. The radius of its wheels is 0.25m. If the wheels are stopped in 20 rotation by applying brakes, then angular retardation produced by the brakes is:

Science/Biology/Health and Social Care
What would happen if the body didn't have any energy? I have looked at Anabolism and Catabolism but I am overall, stuck answering this fully.

Science
What is the volume of the rock if the water level rises to the 120 ML mark

Physics, Math, Science
A 56 kg student is standing atop a spring in an elevator that is accelerating upward at 3.5 m/s^2. The spring constant is 2300 N/m. By how much is the spring compressed? I'm not exactly sure how to approach this problem, much less solve it. The acceleration threw me off, as my...

Science
Direction: Place a big mug, a plastic drinking glass and an empty glass bottle on the table with the big mug at the center, the drinking glass at the edge of the table, and the bottle anywhere on the table. With the force , shake the table and observe what happens to the mug, ...

Science
What is a substance that absorbs and reflects diffrent wavelenghts of light?

Science
What is When digital information is superimposed on a physical environment (two words)

science
How many drop (1drop=0.05ml) of 0.20M potassium iodide must we add to 0.010M Pb(NO3)2 to get precipitation of lead iodide to start if Ksp of lead iodide is 7.1x10^-9.

Science
What is a scientist who studies humans???

Science
What is When digital information is superimposed on a physical environment (two words)

Science
What is a substance that absorbs and reflects diffrent wavelenghts of light?

science
A steel rod of length 60 cm and radius 2.5 mm hangs vertically. If a mass of 2.5 kg is attached to the end of the rod, calculate the increase in the length of the rod

Science
Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic? Help please

science
When a ray of light travels from air to glass and it strikes the surface of separation at 90 degree,then what

SCIENCE
What is the purpose of wildlife corridors build under roads? 1) habitat fragmentation 2) habitat loss 3) habitat competition 4) habitat creation 2 ?

SCIENCE
Which of the following would be most likely lead to increased biodiversity? 1) clear cutting 2) oil drilling 3) national park planning 4) farming I thing 3

Science
a person watching through a window of an apartment sees a ball that rise vertically up then vertically down for a total time of0.5s.if the hieght of the window is 2m ,find the max hieght reached by ball above the window

Science
Nh4hs dissociates in a vessel at temp T K in the presence of 0.5 atm nh3. At equilibrium the pressure due to h2s is 1.5 atm.In a vessel V2 ( initially evacuated) the solid dissociates at T K.The total pressure at equilibrium in vessel V2 is P.and the weight ratio of nh3 and ...

PHYS-041-Keiler: Physical Science
A prehistoric bone is found at an excavation site. If the bone originally contained 22 kg of carbon−14, how much would remain after 11,400 years?

science
In The Darkest Part Of The Mansion, Where The Winds Are Set To High, A Man Fears His Presents, Where The Cotton Lies, Where Am I?

science
solubility of borax in 300 ml of water.

Environmental Science please help
(10 Environmental Science questions. Please help correct my incorrect answers) 1. A prion is an infectious, self-reproducing protein structure. (True)<---My Answer False 2. As one organism eats another, toxins can be spread throughout the food chain. (True)<---My Answer ...

Science , Biology
Cretaceous extinction... The evidence tells you that “overwhelming evidence suggests that the extinction was caused by a 10-km-diameter asteroid that struck Earth.” Suggest at least three lines of evidence that might have led scientists to this conclusion. Could you please...

Computer Science (please help )
Prove that if A is any language over the alphabet {0}, then A* is regular.

maths
in a class of 40 children 3/8 likes english,2/5 likes maths and 3/4 like science .find the number of children who like each subject.

Science
One ship, sailing east with a speed of 7.5 m/s, passes a certain point at 8A.Mand a second ship sailing north at the same speed, passed the same point at 9:30 A.M. At What time are they closest together and what is the distance between them then?

science
What is the average speed of a race cow that travels 60 meters in 20 seconds?

science
A system contains 0.15 m3 of a gas at a pressure of 3.8 bar and 150 C. It is expanded adiabatically till the pressure falls to 1 bar. The gas is then heated at a constant pressure till its change in enthalpy is 70 kJ. Determine the total work done. 

Science
The radius of solid gold sphere is 0.5 cm ,if density of gold is 1.95*10qo power 8 kg/meter cube .Calculate its mass

science
Provide at least three examples of real-world applications in use or in development with reliable references.

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