Science

Recent Questions

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)

Science
On a topographic map, five contour lines are very close together. The contour interval is 100ft. How high is this feature? Answer: 400ft

Science
State how comparing the amino acid sequence of a protein can provide evident that evolution has taken place. A: If evolution has taken place, then, in general, species descended from a recent common ancestor should have fewer amino acid differences between their proteins than ...

Social Studies
1) How did eugenics reinforce nativist ideals? A: Eugenics fueled the nativists' argument for the superiority of the "original" American stock--white Protestants of northern European descent. 2) What political, social, and economic contributions did women make to American ...

science
what are some family characteristics for Halogens

Science help
The length of a football field is 100 yards. When you compare geologic time (4.6 billion years) to the length of a football field, you will find that each yard on the field will equal 46 million years, and each 10-yard section will equal 460 million years. Use this information...

SCIENCE
.) Iodine 131 is a radioactive waste product generated in nuclear power plants. It has a half life of 8 days. If 16 grams was released from the Fukushima power plant 32 days ago, how much is left now?

science
the man walks 20 steps forward from point A to point B and moves 5 more steps to C

Science
which of the following skulls is most likely that of an herbivore?

Gentry science
What in nature could you find a source of the same energy that that provided batteries

Science
2 racing cars of masses m1 and m2 are moving in circles of radii r1 and r2 respectively. Their speeds are such that each makes a complete circle in same time t. The ratio of Angular speed of the first car to the second car is?

Science
a tank 2m high is half filled with water and then filled to the top with oil of density 0.8 g/cc . what is the pressure at the bottom of the tank? g= 10m/s2

U.S. History Answer Check (Ms. Sue)
1) How did eugenics reinforce nativist ideals? A: Eugenics fueled the nativists' argument for the superiority of the "original" American stock--white Protestants of northern European descent. 2) What political, social, and economic contributions did women make to American ...

Science <3
Why do humans laugh?

Science
I do understand what the terms balanced energy and the term unbalanced energy mean when it relates to science. Please help me understand.

SCIENCE
what is the difference between a continental plate and an ocean plate?

SCIENCE
WHAT IS BELIEVEED TO CAUSE PLATE TECTONICS MOVE?

science
Water is useful for reducing friction between objects. However you also learned that (due to friction) moving water causes rough rocks to become smooth. How can this be?

U.S. History
1) How did eugenics reinforce nativist ideals? A: Eugenics fueled the nativists' argument for the superiority of the "original" American stock--white Protestants of northern European descent. 2) What political, social, and economic contributions did women make to American ...

natural science
usingbisection method and fp,evaluat the solution set of x3-4x-9

science
If 0.188 moles of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate would be produced in the following reaction?

science
If 0.188 moles of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate would be produced in the following reaction?

7th Grade Science About Earth Quakes
Hi, I need some information about Earth Quakes. My question is: Where & Why do Earth Quakes occur? I'm not cheating or anything I just need some help with this topic for the project I'm doing about Earth Quakes right now. Please Help ME! Thanks :D

science
I WANT TO KNOW MOLARITY OF BENEDICT'S REAGENT FOR TITRATION .. BOTTLE CONSISTS OF 500ML BENEDICT'S REAGENT. PLZZ HELP

Science
The density of pure silver is 10.5 g/cm3. What is the mass of a sample with the volume of 10.0 cm3?

computer science
A Bagels store charges 75 cents per bagel for orders of less than a half-dozen bagels and 60 cents per bagel for orders of a half-dozen or more. Assume that the number of bagels ordered has been stored in a variable named NumBagels. Write VB code that calculates and stores the...

Science
can you help me understand why it takes more energy to heat something bigger than something smaller please. thank you.

science
which of the following is true about Earths atmosphere? a)the atmosphere contains 78 percent water vapor b)the atmosphere contains 21 percent oxygen c)the atmosphere allows radiation from the sun to pass through and warm Earths surface

science
Ana exerts a force of 20 N on a volleyball that has a mass of 0.15 kg. What is the force that the volleyball exerts on Ana?

SS HELP PLZ ASAP
1) The science that studies population distribution and change is called _________(1 point) A. demography B. geography C. economy D. sociology 2) Canada is bigger than the united states, but only has _______ as many people.(1 point) A.one-half B.one-fourth C.one-eighth D.one-...

science
What are the major phases of the cell cycle?

science
why is it important for a cell to grow before it replicates its DNA?

Physical Science
An astronaut in a spacesuit has a mass of 100 kilograms. What is the weight of this astronaut on the surface of the Moon where the strength of gravity is approximately 1/6 that of Earth?

science
A 155-N sign is supported by two ropes. One rope pulls up and to the right 26.5° above the horizontal with a tension T1, and the other rope pulls up and to the left 49.5° above the horizontal with a tension T2, as shown in the figure. Find the tensions T1 and T2.

Science
What type of water evaporates quicker:well water or salt river water?

need help
ESSAY EXAMINATION 1 Objective To successfully complete the course, you must complete Essay Examination 1, which requires you to write your answers to specific questions covering important concepts from your studies. Please provide your answers using a Microsoft Word file. You ...

science
Saturn rotation and revolution compared to earth

science
A tower is 24 m high. A stone is projected upwards from the tower, at a velocitry of 24,5 m/s. Calculate how long it would take the stone to reach the ground at the roof of the tower.

Science
A 25 l partially filled weather balloon has a volume of 11 L at sea level where the pressure is 1 atm. It rises to an altitude of 6.096km (20,000 feet) where the pressure is only .48 atm. What is the resulting volume? At what pressure would it burst? Use the internet to find ...

science
Why do earthquakes occur along the San Andreas Fault

science
A scenery in your drawing room has height h and is hung in the wall so that its lower edge is at a distance d above the eye of an observer. How far from the wall should the observer stand to get the best view?

science
A scenery in your drawing room has height h and is hung in the wall so that its lower edge is at a distance d above the eye of an observer. How far from the wall should the observer stand to get the best view?

Science
A body weight 500 N in air and weight of displace water is 300N then find apparent loss in the weight of body. The upthrust on body. The volume of the body

science
*Fill in the banks with suitable prepositon. Frustration results ------violence. (a) of (b)in (c)at (d)with

Science
pH values of 12,6,10.5 and 4.3.which of these is acidic and basic

science
10g of calcium carbonate reacted with phosphoric acid to produce calcium phosphate, water and carbon dioxide. write the word equation

Science
if two waves are traveling at the same speed along the x axis will the one with the longer wavelength have the larger or smaller freq ? explain in terms of the number of wavelengths that pass a given point on the x axis in 1 sec My answer: smaller But how do I explain interns ...

Science
A vertical load of 100N is supported by two chains, A and B, in the same vertical plane. The force in A is 50N and acts in a line at 30 degrees to the horizontal plane (i.e. at 120 degrees to the 100N load). Determine the force in chain B and the angle between A and B.

Science
An apple has a volume of 10ml and a mass of 0.8g. Will it sink or float in watee and I need to show my work

Honors Physical Science
How do I find the speed of a truck that travels 14.5 km in 9.25 minutes in km/hr?

Science
A student had to take the volume of a sphere by using a graduated cylinder. Before they put it in the water,the cylinder read 50ml.when the sphere was put in the cylinder the water now read 62ml what is the volume of the sphere?

science
How many parts listed make up a plant or animal cell nucleus?

Science
The Sun's surface layer is called the photosphere True or false? I think the answer is true. A star system has at least 3 stars. True or false? I think the answer is false. I am not completely sure on these. Could someone check them for me?

Science
Most bacteria are a. unicellular eukaryotes b. unicellular prokaryotes c. multicellular eukaryotes d. multicellular prokaryotes is the answer d or c?

Science
  17. You need to conduct an experiment in the laboratory. This requires that you prepare 500 ml of  sodium acetate buffer with pH = 4.30. In laboratory you have  solution of CH3COOH (pKa = 4.75), and a stock of CH3COONa.3H2O (MW=136.082 g/mol). Using the Henderson-...

Science
Name the components of the respiratory system in the order incoming air would encounter then during breathing.

Science
How do layers B and D compare in age? If rock layers between B and D have eroded away, what is the boundary between B and D called? My answer: Layer D is older than layer B. If rock layers between B and D have eroded away, the boundary between B and D are called, an unconformity

Physical science
Which type of graph best shows data that are parts of a whole?

physics math science
A battleship fires a cannon to hit a pirate ship with velocity 200 m/s and angle with horizontal direction 37o. • Find: • A) the position of the bullet after 2 secs, velocity and acceleration. • B) the highest altitude it will reach and time it takes to get there • C) ...

Science
A battleship fires a cannon to hit a pirate ship with velocity 200 m/s and angle with horizontal direction 37o. • Find: • A) the position of the bullet after 2 secs, velocity and acceleration. • B) the highest altitude it will reach and time it takes to get there • C) ...

Social Studies
Who organized trade in medieval cities and towns? (2 points) guilds• clergy knights journeymen 2. What is a fief? (2 points) a ruler of the Franks a ruler in Charlemagne's empire land given in exchange for loyalty• a Viking warrior 3. Christians and Muslims wanted to ...

  1. Pages:
  2. <<Prev
  3. 57
  4. 58
  5. 59
  6. 60
  7. 61
  8. 62
  9. 63
  10. 64
  11. 65
  12. 66
  13. 67
  14. 68
  15. 69
  16. 70
  17. 71
  18. Next>>