Science

Recent Questions

math111
in a science class,65 student study physics while 40 study chemistry.if there are 93 student in the class,how many student study both physics and chemistry?

Science
If a cheetah runs 50 miles in 5 minutes how fast is it running?

science
how are artificial flavors made

science
what is partially hydrogenated soybean oil and how is it made

science
what is the number of cycles an oscillator completes in one second is known? what is a force that always acts to pull a system back toward its equilibrium position? what is the distance from one point on a wave to the same point in the next cycle of the wave called? what is ...

Science chemistry
An excces of sulfur dioxide was reacted with 0.150 g of oxigen gas. A mass of 0.725 g of sulfur trioxide was recovered

Science
Hi. Could you Please check my answers? I just want to make sure they are correct. Thanks for the help in advance :). True or false: All matter on Earth contains energy- true? True or false: the molecules in frozen water are in motion- true? True or false: ice is too cold to ...

science
what is isotopes

Science
if a car travels once around a 100-meter racetrack what is its displacement

Science
1. The streams and smaller rivers that feed into a main river are its A. watersheds B. tributaries** C. divides D. reservoirs 2. How are seamounts like the Rockies? A. Both are forms of mountains** B. Both are made of the same kind of rock C. Both are connected to the ocean’...

Science. (I'm patient, no rush)
Which of the following sets of words can be used to describe the outputs of photosynthesis? A. water, glucose, light energy B. Carbon dioxide, glucose, chemical energy C. oxygen, glucose, chemical energy D. glucose, oxygen, light energy*** Am I correct?

science
Three charges, +2.5 micro coulomb, -4 micro coulomb and 6.3 micro coulomb, are located at (0.20m, .15m), (.50m, -.35m), and (-.42m,-.32m) respectively. What is the electric field at the origin?

Science
Is Gc (32.2 lbmft/lbfs^2) equal to gravity? I think it is, but I'm kinda confused about the whole concept. Could someone explain it to me? Thank you very much.

science
Atomic mass of Sodium atom

Science
Ca = 0.75 , Cb = 0.735, and Ka = 7.87044 × 10 6 volume of acid is 100 mL. What is the volume of base at the equiva- lence point of this titration?

Science
Estimate the pH of a solution containing 0.5 L of 0.4 M HClO4 and 0.5 L of 0.2 M NaOH without using a calculator.

science
Metal obtained by chemical reduction is it iron or aluminium?

Science Help
1. Over which interval is the velocity greatest? FILL IN THE BLANK ____ 2. Over which interval(s) is the velocity zero? FILL IN THE BLANK ____ 4. What is the average velocity in m/s from A to B? FILL IN THE BLANK ____ 5. The velocity of an object goes from 4 m/s to 12 m/s in ...

Social studies
Advances in science from the Scientific Revolution were applied to human affairs during the ____________. A. Industrial Revolution. B. French Revolution. C. Enlightenment. (MY ANSWER) D. Age of exploration.

Science
Multiplying Rabbits Suppose that a pair of rabbits produces six offsrping: 3 males and 3 females. Assumes that no offspring die. 1. If each pair of rabbits breeds only once, how many offspring would be produced each year for 5 generations? 2. Construct a graph of your data. ...

Science
Which abiotic factor is essential to all aquatic ecosystems excpet the ocean hydrothermal vents, and why? a. phytoplankton, because it provides a source of food b. salt, because it provides the necessary environment for organisms to move about c. deep water, because it ...

More Science
5. What is the major difference between ectotherms and endotherms? A, Whether or not the animal builds a nest on land. B, whether or not the animal has been found on several continents C, whether or not the animal maintains a constant body temperature*** D, whether or not the ...

Science
1. Which of the following characteristics of the Arctic rabbit is specifically an adaption living in the tundra? A. small size B. keen eyesight C. strong legs D. white fur*** Am I correct?

science
A car initially moves along a straight road at 50 km/hr, and then turns around to travel at 80 km/hr in the opposite direction. What is the car’s change of velocity?

science
1) Which law of chemical combination is illustrated by the fact that 168g fe reacts with 72g H2O to form 232g fe3O4 n 8gH2

8th grade science
I'm not sure what's the correct answer: 9)Which of these characteristics can only be attributed to a wave of red light? A)The energy of the wave travels in the same direction as the wave travels. B)The wave travels by vibrating the particles of the medium at a high rate. C)The...

science
the oxide of which one of the following shows acidic properties?

Science
The trees leaves make a kind of cover that cover over the other plants in the rain forest. What is this part of the rainforest called?

Science
Are air masses that form over land moist

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

science
A machine raises a load of 600N through a height of 1.5m when an effort of 100N moves a total distance of 20m.(a) calculate the work done in raising the load.(b) what is the mechanical advantage of the machine?(c) calculate the efficiency of the machine.

English
I thought it was C for this Victor Frankenstein recounts the influences that lead to his great experiment: I feel exquisite pleasure in dwelling on the recollections of childhood, before misfortune had tainted my mind and changed its bright visions of extensive usefulness ...

science fair
will a heavy metal spring launch a baseball 7 feet in the air with 5 pounds of preasure

Science
When two hydrogen atoms bond with one oxygen atom to form water, what happens to the electrons? A. Each hydrogen atom donates its electron to the oxygen atom. B. The oxygen atom donates an electron to ach hydrogen atom. C. A pair of electrons is shared at each of the hydrogen-...

Science
Name each compound by ionic, hydrogen, or molecular compound and name the following? Im stuck on these! help please!! 1- Al2S3 2- SrI2 3 - CL2O5 4 - FeCl2 5 - BeH2

life orientation
Identity three courses or study field associated with science and give 2 reasons for each

science
Gold(at weight 197gmol-1) crystallizes in a cubic closest packed structures ( the face centred cubic ) and its density is 19.3 gcm-3 .calculate its atomic radius.?

life science
A suitable aim for investigation 1 to test glocose

Science
What is the balanced chemical equation for "solid calcium hydrogen carbonate reacts with hydrochloric acid solution producing carbon dioxide,water and calcium ions in solution?"

math
Here is bob's test score math 65 arts 86 science 84 social studies 78 if his average score is 80 ,how many marks did he make in gramma

geography, history, life science and maths literacy
what courses can I do at university( NWU )

Social science
According to Justice William O. Douglas, where can zones of privacy (the right to privacy) be found in the Constitution? Question 2 options: throughout the Constitution in the penumbras of the Bill of Rights in the First Amendment in the writings of the Founders I think it's ...

Social science
The Second Amendment continues to be a controversial issue. One of the main questions is whether it was meant as a _______ freedom or _______ freedom. Question 4 options: individual; group absolute; conditional temporary; permanent good; bad

political science
The Lilly Ledbetter Fair Pay Act was passed by President Obama in 2007 in order to address what issue?

political science
The former Soviet Union cannot be considered a democracy because A. it did not regularly hold elections B. it permitted no acts of conventional participation C. it had no legislature D. there was only one political party

political science
Which of the following conditions was NOT a part of the Lemon Test, as established by the Supreme Court? A. They must not entangle the government exclusively with religion B. The primary effect must not be to advance or inhibit religion C. There must be a secular purpose D. ...

political science
According to Justice William O. Douglas, where can zones of privacy (the right to privacy) be found in the Constitution? A. throughout the Constitution B. in the penumbras of the Bill of Rights C. in the First Amendment D. in the writings of the Founders

science
How can we measure the Gravitational field intensity of any place on earth ?

science-math
A pharmacist has an 18% alcohol solution. How much of this solution and how much water must be mixed together to make 10 liters of a 12% alcohol solution?

science
Calculate the wavelength of a wave of frequency 40 MHz propagating in a medium Speed of light-(3*10to the power 5. )

Science
What is the charge on 500 mg of electron?

Science
How does lustre affect the amount of heat being absorbed by a black can

science
A example of negative feedback a. elevated free t4 resulting in elevated trh b. elevated free T4 resulting in elevated tsh c low free T4 resulting in elevated tsh d. low free t4 resulting in low tsh i think its B. not sure.

Science
What caused the ten years war

Physical science
A 11-kg box is dragged across a frictionless surface by a force F=55N. the box travels 4.0ft. what is the work done by the applied force F and the work done by the normal force?

Science Problem Plz Help
A charge q1=7.00 x 10^-6 is placed 0.300m from a second charge q2=-5x10^-6 C. Find the magnitude the force between the two charges.

Science
When two hydrogen atoms bond with one oxygen atom to form water, what happens to the electrons? A. Each hydrogen atom donates its electron to the oxygen atom. B. The oxygen atom donates an electron to ach hydrogen atom. C. A pair of electrons is shared at each of the hydrogen-...

snowmobiles/science
What other things would be used to make a snowmobile accelerate?

Science
Does the tilt of the earth cause one hemisphere to be closer to the sun? True or false False.

Maths literacy ,life science,history,geography
Which university or college take the subjects that i am doing

maths,geography,life science,history
explain in a short paragraph what can trgger spectator aggressive in sport

math lit,life science,geo and history
which careers require these subjects?

Science
A charge q1=7.00 x 10^-6 is placed 0.300m from a second charge q2=-5x10^-6 C. Find the magnitude the force between the two charges.

Science
A cord of negligible mass is wound around the rim of a flywheel of mass 20 kg and radius 20 cm. Steady pull of 25 N is applied in tue cord. The flywheel is mounted on a horizontal axis with frictionless bearings. Compute the angular acceleration of the wheel. Find the work ...

Science
An electric light is plugged into a 120-V outlet. If the current in the bulb is 0.5 A, how much electrical energy is used by the bulb in 15 minutes?

Science
What is the force that results from a 3,000 kg car accelerating at 20.00 m/s2? A. 150.0 N B. 3,000 N C. 3,020 N D. 60,000 N** I think D

Science
How many valence electrons does magnesium (Mg) have? A. 12 B. six C. three D. two

Science
A 55 kilogram person and a 65 kilogram person climb 8 meters up a flight of stairs in 10 seconds. Compare power used by each person

Weight Is Force! Science
A space ship has a mass of 9000kg. the space ship is launched from Earth and lands on a distant planet where it has a mass of 390000 N. What is the acceleration of the gravity on this planet?

physical science
a symmetric projectile spends a total of 20 seconds in the air. it reaches a peak height of 8 meters. how long does it take to reach its peak height? the projectile has a range of 80 meters. what is its horizontal velocity? what is the projectile's horizontal acceleration? ...

physical science
a flower pot is dropped out a twentieth story window. how fast will it be moving after 7 seconds? how much is the acceleration 3 seconds after it falls?

Weight Is Force! Science
A space ship has a mass of 9000kg. The spaceship is launched from the Earth and lands on a distant planet where it has a weighted of 39000 N. What is the acceleration of gravity on this planet?

physical science
a piece of metal has a mass of 85 cg and a volume of 450L. What is its density in g/cm^3? What would be the mass of 300cm^3 of this metal? What would be the volume of 200 ounces of this metal?

physical science
how many centimeters long is the proverbial "10 foot pole?" show work

Science
A girl standing on a bridge throws a stone vertically downward with an intial velocity of 15.0 m/s into the river below. If the stone hit's the water 2.00 seconds later what is the height of the bridge above the water?

science help pls pls
The table below shows the average annual precipitation over a period of five years in three locations of Florida. Locations | Amount of precipitation 1 between 45- 65 inches 2 more than 96 inches 3 less than 8 inches Which of these statements is correct for the three locations...

science help pls pls
Which of these is an example of how the ocean plays an important role in climate change? The warm Gulf Stream helps maintain moderate temperature in coastal regions in southern Florida. Aquatic animals produce carbon dioxide during respiration which causes warming of ocean ...

science help pls pls
A student designed an experiment to demonstrate the interaction between Earth systems. The steps of the experiment are given below. *Take a pot full of dry soil. *Keep the pot in direct sunlight. *Do not water the soil for a week. *Observe cracks in the soil after a week. The ...

Science
Which of the following is not a benefit of wetlands? a) wetlands provide a place for exceptional weather to occur** b) wetlands provide a habitat for fish and wildlife c) wetlands clean and recharge water supplies d) wetlands reduce flooding risks 2. a wetland is to a ...

Science
Which solution will best allow the movers to achieve their goal? A) Change the width of the ramp from 4 meters to 3 meters. B) Change the length of the ramp from 4 meters to 5 meters. C) Change the height of the ramp from 3 meters to 4 meters. D) Change the length of the ramp...

science !!
1. how do scientists classify stars? by size distance and color by size distance and brightness by color brightness and distance by size brightness and temperature 2. which of The following factors determines how long is Star will live a stars color stars mass the stars ...

science
if the mass of the earth is 598*10 to the power of 22km and the mass moon is 7.36*10 to the power of 22kg. calculate the difference in their masses, what is the answer in scientific notation

maths lit,life science, geography and economics
Which career should I follow with those subjects I don't know what to do

Science.
2. Select 3 terms that belong together. To do this, pick one term from each of the 3 sets. Set 1: intertidal zone, neritic zone, deep zone Set 2: moderate light levels, freshwater, temperature fluctuations Set 3: clams, squid, beavers. A. intertidal zone, temperature ...

Science
1. Which of the following explains why sunlight is important to the aquatic ecosystems? A. Sunlight provides a source of heat and energy to increase water temperatures. B. Sunlight keeps harmful bacteria from taking over aquatic ecosystems. C. Sunlight makes it possible for ...

science
A car moves 3 kph. Car B which is 50 m ahead of Car A is moving at 6 kph. If car A accelerates by 5m/s/s, determine if the cars will collide

Science
Kilograms divided by Newton?

Science
How do you do kilograms multiplied by Newton?

Science
You are walking on a moving sidewalk (moving at a speed of 2 mph).if you are walking in the same direction as the sidewalk at a speed of 4 mph what is your velocity relative to the ground what would be your velocity if you were walking in the opposite direction as the moving ...

Science
Tomorrow I have the midterm (Lab-Earth Science) on 1 Minerals Igneous Rocks Sedimentary Rocks 2 Topographic Maps 3 Geologic Time Help with this, please.

science ms.sue or mr.reed plz help me
why does the design of the vacuum flask minimize heat transfer by conduction

Science
Describe how the meteorite collision at the end of the Mesozoic affected the atmosphere and the biosphere.

science
Can scientists use radiocarbon dating to find the age of a very tall, old redwood tree living in an old growth forest?

Science
1.)Which of the following are chemical changes? A.)Boiling Of Water B.)Melting A Cube of ice C.)Dissolving 10 grams of salt in water D.)Splitting water into hydrogen and oxygen 2) What is the mass of water that results from combining 2.0g of hydrogen with 16.0g of oxygen? (1 ...

Science
Describe ozone creation and loss in the ozone layer. Does one occur more than the other?

physcal science
If the velocity of the car is increased to 45 km/hour, what is its kinetic energy?

science
nickel complexes(ethylenediamine) with graph of absorbance vs wavelength

science
A cylinder of length 5cm and uniform cross section area 50.24cm^2 is suspended from a spring balance and totally immersed in water.If the density of the material of the cylinder is 1.25g/m^3. Determine the upthrust on the cylinder. Take g=10m/s^2 density of water=1000kg/m^3

Science
what is the role of malic acid in the reproduction of fern plant

science
A 34.0-kg crate is being pushed across a floor. The net horizontal force on the crate is 80.0N. Starting from rest, the crate is pushed over a distance of 4.4m. What is the final speed of the crate?

  1. Pages:
  2. <<Prev
  3. 44
  4. 45
  5. 46
  6. 47
  7. 48
  8. 49
  9. 50
  10. 51
  11. 52
  12. 53
  13. 54
  14. 55
  15. 56
  16. 57
  17. 58
  18. Next>>