Science

Recent Questions

science
Which of the following is true about the electric charges on the objects below?

science
when raining,it's advisable not to to t t t t to8 t t t t+t t t touch canvas tent from inside

science
boy 40kg sits 2m from a pivot.find the weight girl who can balance sitting 3.2m from pivot

science
why displacement uns uitable for determine t v volume of charcoal

Physical Science
A current of 6.0 amps passes through a motor that has a resistance of 5.0 ohms. calculate the power. my answer is 180 watts

Science
Which of the following describes an example of land reclamation? 1) after an area is mined for copper, the soil is replaced and new plants are planted. 2)after a forest is clear-cut, desertification occurs. 3)after a forest is clear-cut, it is mined for copper 4)after an area ...

Science
Which of the following must be true of the structures of axons and muscle cells in order for nerve impulses to stimulate muscle contraction? A. Axons in muscle cells must both have structures that make in secrete the same molecules B. Axons in muscle cells must both have ...

Science
A man of50 kg climbs a tower of height 45 m in 5 seconds with the help of a rope. Find the power of the man.

science
why ice floats on water

Science
car 1 is moving at 10 m/s and hits car 2 if they have a perfectly elastic collision and the masses are 1700 kg and 3000kg respectively what is the final velocity of the second car ?

Science 8.4
Which arrangement below lists elements of the same group, in order, from those having least protons to those having the most protons? o,s,se,te na,s,al,cl o,n,b,ki rb,k,na,li

science
Which of the following materials is a good conductor of electric current? A-Glass pane B-Wooden spoon C-Silver spoon D-Rubber tire

Science
Hi! I just want to make sure my answers are correct. (Key: * means that is my answer.) A basketball momentarily changes shape as it bounces off the floor. This is due to balanced forces on the ball. True False* A ball slowing down as it rolls across the carpet is an example of...

Math and science
A metorite weighs 300 n on the moon.The moon's force of gravity is 1/6 that of earth.What is the metorite's weight on earth's

Science
Which of the following explains why water is a liquid at room temperature but oxygen is a gas at the same temperature? A. The cohesive forces between water molecules is less than that of oxygen. B. Water is the universal solvent. C. Water has a greater buoyancy force than that...

Science
How many molecules of Br2 react with 1.11 x 10^20 molecules of F2

Spanish 1 b
please check my answers 2. How do you say one must in Spanish A. Hay que * B. A menudo C. Que más D. Es necesario 5. A person of mixed European and indigenous heritage is commonly to as a____ A. Mixtec B. Mestizo* C. Maya D. Nahuatl 6. Which is not a place in the community? A...

Science
Can someone send me a link to what global warming is? Thanks

Science
Which of these is an example of a biomass fuel? 1) oil 2) natural gas 3) wood 4) coal I think #3

Social science
What role do wind patterns and ocean currents play in the earth's climate? (10)

Science
Can someone please help direct me to a start for this?? 1. Explain why the outer planets did not lose the lighter gases in their atmosphere. 2. What are two major differences in the composition of the inner and outer planets?

Science
If ethics is an art of living, what is its subject matter, that is, what is it about ourselves that it is in relation to, and what does this have to do with living intelligently?

Science
What is the limiting reagent in the solvay process given the equation NaCl+NH3+CO2+H20 giving us NaHCO3+NH4Cl

science
Im a word of five letters People eat me If you remove my first letter i will be form of energy if you remove my first two letters i will be needed for living if you remove my first three letters i will be a preposition if you remove my first four letters i will be a drink for ...

Science
Explain the meaning of osmosis

Science- PLEASE HELP SOMEONE!!!!!!!!!!!!! PLEASE
20. If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore (an) ___________ with respect to the number of trout that a particular stream can support. 22. ...

Science
20. If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore (an) ___________ with respect to the number of trout that a particular stream can support. 22. ...

Science
During what phase of the moon can a lunar eclipse occur? New moon, full moon, first quarter or waxing gibbous? I think it's a full moon.

Science
A fungus called stem rust penetrates the cells of a wheat plant, causing water loss, destruction of food-producing parts, and retarded root developemtn. Both the yield and quality of the grain are reduced. This relationship of stem rust to wheat would best be classified as A. ...

Science
Will arrive at his mother's office at 3 p.m. it took him 30 minutes to walk from his home to the Mall he was in the mall for 45 minutes it then took him 15 minutes to walk to his mother's office at what time did I leave home

Physical Science
An experiment was done. Pulling blocks of mass that were certain amounts of newtons. There were 2 tests done. However, they varied by a couple decimals after the second test. The results from the two tests differ slightly. Which would most likely cause the variations in these ...

science
Which of the following is the best reason for the smaller number of drone bees compared to the number of worker bees in a beehive? a. the drones are always away from the hive pollinating flowers. B. because worker bees are smaller than drone bees, more workers can fit into a ...

Science
How does a nuclear power plant produce energy? A. Through solar panels B. Through nuclear fission reactions C. Through geothermal heat D. Through nuclear meltdown reactions I am not really sure what the answer is but I am thinking…c? Or I guess d?

Science
Which of the following is a problem with using solar power as a main source of energy? A. People do not yet have the technology to use solar power*** B. The sun is not close enough to provide solar energy C. Power from solar energy contains a large amount of harmful D. Solar ...

Science
Which of the following carries oxygen to every cell of your body? alveoli bronchi capillaries lungs I think its number 2 but i'm not sure, Could someone check my answer?

Science
For your discussion assessment, you will present your proposal of a device that minimizes heat transfer. Respond to at least two other posts by reviewing the proposals of your classmates. can somebody give me an example please!

Science
Explain what is meant by closed system of circulation

science
A bus starts from rest and attains 40km/hr velocity after 10sec . Calculate the acceleration of bus in m/sec2

Bachelor of computer science
A program is required to calculate the weekly pay for an employee. The pay clerk inputs an employee ID, hours worked and an hourly rate. The program will output the employee ID, and Gross Pay. Gross Pay is the sum of regular pay plus any overtime pay earned. Overtime pay is ...

Physical Science
An experiment was done. Pulling blocks of mass that were certain amounts of newtons. There were 2 tests done. However, they varied by a couple decimals after the second test. The results from the two tests differ slightly. Which would most likely cause the variations in these ...

science
#1. When the air under the envelope is heated, the balloon lifts. Which of the following statements is true. a. Hot air balloons use radiation to rise. b. Hot air balloons use conduction to rise. c. hot air balloons use convection to rise. d. hot air balloons use air ...

Physical Science
Determine how long it will take given the scenario below (in time and in distance) to react to the car in front of you. Assume that the car in front of you takes 3 seconds to change speeds. Reaction time 1.6 seconds Speed: 75 mph Initial velocity: 33.53 Final velocity: 29.06 ...

science URGENT!!
what is the relationship does wave height have with frequency? What is the relationship does wave height have with amplitude?

Science
Assume you are speeding down the freeway at 75 mph. The car weighs 1500 kg and the effective force of the brakes is 14400 N. The car in front of you suddenly slows down, it takes 3 seconds for the car to do so. Your initial velocity was 33.53 and your final velocity is 0. If ...

Science. HELP!!
If you decrease the frequency of a wave, how does the velocity change?

SCIENCE
A stone thrown from the top of a building is given an initial velocity of 40.0 m/s straight upward. The building is 70.0m high, and the stone just misses the edge of the roof on its way down, determine (A) The time at which the stone reaches its maximum height, (B) The maximum...

Science, Physics
Assume you are speeding down the freeway at 75 mph. The car weighs 1500 kg and the effective force of the brakes is 14400 N. The car in front of you suddenly slows down, it takes 3 seconds for the car to do so. Your initial velocity was 33.53 and your final velocity is 0. If ...

Science
When are tides in the earth's oceans the highest

science
Frogs hear with their _______ lining of their mouth tongue tympanum nostrils*** I'm not so sure about this question. I went back and looked in my book but i can't find anything, I searched it to and still couldn't find anything. Could someone please help me better understand ...

science(computer)
what line should i adopt after matric if i'm not good at maths???? (pakistan)

English
1. Write down four friends' names in the name column in the table. 2. You can communicate with others in groups with the five questions on the blackboard. 3. What is her mother asking of her? 4. I'd like you to introduce one of your friends in the table to the classmates. 5. ...

English
1. I can't do the science project myself. It's too difficult? What does it refer to? #2 or #3? 2. doing the science project myself 3. the science project --------------------------------- 4. I'm going to Tom's house to work on the science project. 5. I'm going to Tom's house ...

science
A golf ball was hit and projected at an angle of 65° with the horizontal. If the initial velocity of the ball was 60m/s.Calculate the time the golf ball was in the air and the horizontal distance the ball travelled

Science
What is the average speed in average velocity of a tip of minute hand in 1 hour where the length of the minute hand is 10 cm

Science
Place the following words into the in order gametes, sporophyte, gametophyte, and zygote. Explain how the terms are related.

Science- Air resistance
A question on air resistance using the parachute experiment. Make a parachute using plastic bag as the material for the canopy of the parachute. Drop parachute from a height to test how well it works. Hope someone can help me with the following questions: 1) Does a larger ...

Science! NEED HELP URGENT
What effect does amplitude have on velocity?

Science
Over time, a plant pollinated by a hummingbird has developed very long, tube-like flowers. Why might the flower have adapted in this way? A)The longer, tube-shaped flowers probably developed to keep the hummingbird from reaching and drinking the flower's nectar. B)The longer, ...

science
Which of the following would cause the greatest decrease in gravitational force between the earth and the moon? an increase in the earth's mass an increase in the moon's mass an increase in the distance between the earth and the moon a decrease in the distance between the ...

science
Which of the following is not a stage in the development of a thunderstorm? developing stage dissipating stage mature stage updraft stage

Science
A sample of gas has a volume of 356 mL at 740 torr and 25 C. What pressure will the gas exert at 50 C and 250 mL?

Science
An automobile starting from rest at t0 = 0 at x0 = 0 undergoes constant acceleration in a straight line. It is observed to pass two marks separated by 64 m, the first at t = 8s and the second at t = 12s. What is the value of the acceleration?

science
If you had a real thermometer that was accurate, how could you modify your experimental thermometer to read actual temperatures?

PUBLİC LAW, Political science, ir
You are a Spanish conquistador who just took control of a large territory in Americas in medieval time. Which political concept requires you that you should obey the orders of the Spanish King and not to administrate the land on your own??(this question is for my public law ...

Science
Which of the following is NOT a characteristic of an animal? Have eukaryotic cells digest their food make their own food******* have many cells with different functions

Science
How do you find the half life of strontium 90? I know that the answer is 28.8 years but how do you arrive at that answer?

science
Determine the amount of NaoH dissolved in 250ml of the solution by titrating it against N/10 H2so4 solution

science
three equal charges 2.0×10^-6 each ae held

Science
Say we have a jar of water, Is the angle of incidence, the angle that the the light enters the water, the angle above the water or the angle below the water?

Science
Since no one answered, and I really need help: So I am doing this science experiment about light. I chose to do one where you put a pencil in a glass of water and the light makes it look like it's bending. There is a chart of measurements that you need to fill out and I have ...

Science
Since no one answered, and I really need help: So I am doing this science experiment about light. I chose to do one where you put a pencil in a glass of water and the light makes it look like it's bending. There is a chart of measurements that you need to fill out and I have ...

science
In which temperature of water did the food coloring diffuse faster?Using your knowledge of the motion of molecules, explain the result

Science
So I am doing this science experiment about light. I chose to do one where you put a pencil in a glass of water and the light makes it look like it's bending. There is a chart of measurements that you need to fill out and I have no idea how to get them. I know you are gonna ...

Science
What is the mechanical advantage of a machine that used 600N to overcome a load of 1200

Forensic Science
If there are 45 drops of alcohol/mL, and the density of alcohol is 0.789 g/mL, what is the blood alcohol concentration of your unknown sample?

science (please please please help)
3. Nitrogen-fixing bacteria live in protective nodules (bumps) on the roots of some plants. These bacteria are able to convert gaseous nitrogen from the air into a form of nitrogen that the plants can use. Which type of relationship is this? ~mutualism*** ~predation ~...

Science
The basic activities of life occur in the _______ nucleus DNA mitochondria cell****

History
What impact did learning about classical science have on chirstinaity

science
A researcher put 10.0 moles of N2O into a 2-L container at some temperature where it decomposes according to the following: N2O = 2N2+ O2. At equilibrium 2.20 moles of N2O remain. Calculate the Kc for the reaction. How am I supposed to fill in the ICE chart if Kc isn't given ...

Physical Science
If you know the rate of movement along a fault, the amount of offset over a period of time can be calculated. The basic relationship is Rate = distance/time Movement along the San Andreas Fault is about 3.5 cm/yr. If a fence were built across the fault in 2005, how far apart ...

Physical Science
If the mid-Atlantic Ocean is spreading at 2.4 cm per year, how many years has it taken for it to reach its present width of about 5000 km?

science
Height of object is 1 cm placed at a distance of 15 cm from a concave mirror of focal length 10 cm. Find nature, size and position

Science
You digestive system has three main functions: digestion, absorption, and elimination. In which organ does absorption begin? A. Mouth*** B. Stomach C. Small Intestine D. Gall bladder

Science
A Ball Thrown Vertically Upwards From Ground Level Hit The Ground After 4s Calculate The Maxium Height During This Height

Computer Science
Data packets travel from router on layers 3 and 4. As this happens their headers change. Explain why this is the case with reference to ip and mac adresses.

Science
The Richter Scale is based on measurements of the ____ of a seismic wave. A. Speed B. Frequency C. Intensity*** D. Amplitude

SCIENCE CHECK!
1. One of the products of photosynthesis is carbon dioxide.*** fire. oxygen gas. mass. Am I right?

Physical Science
At a crime scene, the forensic investigator notes that the 7.0-g lead bullet that was stopped in a doorframe apparently melted completely on impact. Assuming the bullet was fired at room temperature (20°C), what does the investigator calculate as the minimum muzzle velocity ...

science
What do the bone marrow and the epidermis have in commen

science
what energy source can generate most of my home's electricity day and night????

science,
how does a nuclear power plant produce energy

Science
a factor wants to build a big tank to store chemicals the tank will be near a river which of the following is a possible result of building the chemical tank a. the chemicals from the facility would not have any effect on the environment b) the chemicals will pollute the river...

Science
Water that contains impurities conducts electricity because _______ carry the charge

Science
How many grams of potassium iodide crystals is needed to make 1M.

Science
Which of the following is an example of density? A. Ice floating on top of a river B. Convection currents that cause wind C. Oil spill cleanup D. All of the above Pls help Idk this..

science (chemistry)
consider the following reaction AgNO3+KBr=AgBr+KNO3 calculate the amount of presipitate in gram obtained when 0.25 mole of AgNO3 is trheated with excess of aqueous KBr solution

Science
1. How did planetesmals form planets? A. They broke apart into smaller chunks. B. They collided and stuck together.<<(I think it's this answer) C. They cooled and pulled ice together. D. They began to rotate. 2. What distance was used to define the astronomical unit (AU...

Science
1.What challenges does [your topic] pose to biodiversity? 2.What do you think should be done and why? Can someone help me plz!! i have to write a discussion.

Chemistry (science)
Which compound is likely to have a lower melting/boiling point?Hydrochloric acid or Potassium sulfate? Justify. Now I know that hydrochloric acid has the lower melting and boiling point because it is covalent and potassium sulfate has an ion-ion force acting on it. But the ...

Science
What is the morality of a solution made by dissolving 9.80 g of H2SO4 in a 200.0 g of H2O?

  1. Pages:
  2. <<Prev
  3. 5
  4. 6
  5. 7
  6. 8
  7. 9
  8. 10
  9. 11
  10. 12
  11. 13
  12. 14
  13. 15
  14. 16
  15. 17
  16. 18
  17. 19
  18. Next>>