Science

Recent Questions

Honors science
a student wanted to investigate whether or not the temperature of the water would affect the solubility of sugar she had three glasses of water each with 200 ml of water in them one was at 10 c the second a 25c and the third one was at 40 c she found that the warmer water ...

Science Help Practice
Calculate the speed of an 90,000 kg airplane with a kinetic energy of one billion Joules. What is the mass of a car that has a kinetic energy if 4,320,000 J moving at 23 m/s? My answer to number 1= 149.07 second one- not sure. I looked up the internet for formulas on finding ...

Science
Let vector A=i cap A cosx+j cap A sinx , be any vector. Another vector B which is perpendicular to A can be expressed as?

Science
A Space Traveller determine the radius of a Planet to be half that of the earth after landing on its surface he find the acceleration due to gravity to be twice of the surface of the earth find the ratio of the mass of a planet to the earth

Science
A 50-kg block is being pulled up a 30.0^ slope by force of 250N which is parallel to the slope, but the block does not slide up the slope. What is the minimum value of the coefficient of static friction required for this to happen?

science
a body of moss4kg moving with a uniform velocity30m/s is brought to rest in 6sec . find the force required to stop body.

science
At a pressure 43 kPa, the gas in a cylinder has a volume of 11 liters. Assuming temperature remains the same, if the volume of the gas is decreased to 5 liters, what is the new pressure? kPa Im guessing it 58 or 77x10^3

Science
how many times does the sun appear to rise in a week? A) one B) Five C) seven D) not there I think it's c) seven. Plz check. Thank you!

Science
Two forces of 20 N and 5 N are acting at an angle of 120 degree between them. Find the resultant force in magnitude and direction ?

Science
Clay is a plastic material does this imply that it is a polymer

Political science
What is the advantages of democracy government and non democracy government

Science - Organic Compounds
What elements are the most abundant in living organisms?

science
What physical property is changed when a waitress pours coffee from a pot into four mugs? density color volume temperature

science
Baking soda is mixed with water, and no bubbles are produced. When baking soda is mixed with vinegar, it bubbles and foams rapidly. What chemical property of baking soda is shown in the scenario? 1)reactivity 2)boiling point 3)flamibility 4)color change (select all that apply)

science
Which process is an example of a chemical change? A metal railing rusting in damp weather alcohol evaporating from a cotton swab steam rising from a boiling pot of soup a piece of wood shrinking as it dries out

science
Which process is an example of a chemical change? drying clothes in the dryer chopping a tree activating a glow stick heating a cup of tea

science
Imagine yourself making a nice cup of tea on a cold winter day. You begin by boiling some water in a kettle. Next, you add the steaming liquid to your cup. Then, you open a tea bag and repeatedly dunk it into the water. You pour a dash of milk and drop a few sugar cubes into ...

Science
Unscrsmble this word atsetlectoicnp

Science
After the experiment, scientists organize and __ the data. (The second letter is an n and the last letter is an e.)

science
which items would still be classified in the same way? Which items would be classified differently? • atoms     • elements     • compounds     • molecules     • matter please help

science
dose the flame of a gas stove emit light

Science
A particle start moving with acceleration 2m/s^2.Distance covered by it in 5th half sec is?

Science
A body is projected vertically upward with a speed of 40 m/s. Find the distance travelled by the body in the last sec of the upward journey taking g = 9.8m/s

Science
WHat names do we give to portion of the earth form (a) our gaseous environment, (b) our liquid environment, and (c) our solid environment. My answers a. greenhouse gases b. ocean c. land

Maths,geography nd science
What are four factors that cause each of the social issues

Science
Would do you think would happen if blood entering the heart mixed with blood leaving the heart.

science
Why is filter paper a poor material on which to powder a solid before introducing it into a melting tube?

science
2Zn+O2=2ZnO. What type of chemical reaction is it

science
a stone is thrown vertically upward,went up 98m and came down.How long was it in air?

science
A stone is dropped from a height of 45 meter . what will be the distance travelled by it during the last second of its motion ? take acceleration as g=9.8m/s^2

Science I reallllllyyy need help!!!!
which of the following describes scientific inquiry? (1 point) a statement that describes what scientists expect to happen in an experiment facts, figures, and other evidence gathered through observation the diverse ways in which scientists study the natural world a well-...

Science
A Stone of 5 kg falls from the top of a cliff 50 m high and buries 1m in sand. Find the average resistance offered by the way sand and the time taken to penetrate.

Computer Science
Calculate: This function must be called from main() from within the loop. For each month, calculate the amount of interest to be paid that month (adding this into balance before calculating minimum payment), total of interest paid, amount of minimum payment due for the month...

science
Different between voltery and in voltary muscles

science
farm machine has a velocity ratio of 12 and an actual mechanical advantage of 10.calculate the work input of the machine if it raises an 80kg load by 6m?

Science
Which is hotter 50 mls of 75 dgrees celcius water or 200 mls of 70 degree celcius water and why?

Earth Science (check answers)
1. The mass number of an atom is obtained by totaling the number of_____and____. a. electrons and protons b. electron and neutrons c.protons and neutrons d.neutrons and isotopes Is it B? 2. Which of the following statements about the chemical combinations of atoms to form ...

Science
1. Which skill involves creating representations of complex objects or processes A. Classifying B. Predicting C. Making models**** D. Evaluating 2. The mass of an object is described in what A. Meters B. Cubic meters C. Liters D. Grams ****

science
two point charges of 100 micro columb and -100micro columb are 2×10 to the power -3meter apart find dipole moment

Science
Which of the following means using specific observation to make generalizations A. Bias B. Subjective C. Deductive reasoning D. Inductive reasoning *** which of the following is not true about bias? personal bias involves the influence of your own likes and dislikes ethical ...

Science
E.f of feso4

computer science
Sara needs to needs to trek from an oasis to a destination 10 miles away across a barren desert. However, she finds herself dealing with the following limitations: a) Crossing one mile of desert requires using 1 gallon of water. b) She can only carry 6 gallons of water at a ...

Science
the pilot of a private plane flies 20km in a direction 60 degrees north of east,then 30km straight east,then 10km straight north.how far and in what direction is the plane from the starting point

school
1) A great way to teach math is through children's everyday experiences. Answer:True 2) Children can use words they have never had experience with or heard before. Answer:False 3) Children with limited experiences have limited language ability with regard to semantics or word ...

st.mary school(science)
at the average speed of 40km/h a car takes 5 1/2 to reach jiribam from imphal.how far is jiribam from imphal.

Science
If 3N,4Nand12N act at a point in matually perpendicular direction.The magnitude of the resultant force is

Science
A concave mirror having a radius of curvature 40 cm is placed in front of an illuminated point source at a distance of 30 cm from it.Find the location of the image. I got 6cm as my answer and its wrong

science
which part of a plant cell is made of cellulose

Science physics
A boy stands on the roof of a 50m tall building and thrown a ball horizontslly at 20m/s away from the building. How far away from the foot of the building will the ball land?

science
Can you explain how matter and energy are continuously transferred between organisms and their physical environment? All help welcomed, I'm willing to be directed to links etc thank you! Im truly stumped here i know it probably has to do with the carbon cycle I'm just not sure...

Science, physics, work/power/enegry
I have to do a crossword puzzle for my exercise due tomorrow but the words aren't fitting... two blanks 1. Going downward 19 blocks on the 6th is "v" 15th is "a" 17th is "I" 19th is "n" and the question is "an example of radiant energy" 2. Going horizontaly 4 blocks on the 3rd...

science
A body is dropped the roof of a building 10 mtr high calculate the time and speed g =10 m/s

Science
A body slides down a curved track which is one quadrant of a circle of radius R. If it starts from rest at the top of the track and there is no friction And the body starts from rest it's speed at the bottom of the track is

science
what is force

Science
What are ligaments and tendons?

Science , phycics
Calculate the density of an object of volume 3mcube and mass is 9kg?

social science
essay on overview of labor scenario in India comparing two states in India

Science
how does cal c vita dissolve in water ? 0 Graphs ? Data ? Method ?

Science
How to determine SiO2/Na2O ratio after mixing Na2SiO3 (SiO2=35%, Na2CO3=15%, water=50%) solutions?

Science
Write correct formulas for the products in these combustion reactions. a)C6H6 + O2= b)C12H22O11+O2= c)C25H52+O2= d)C2H5OC2H5+O2= e)C4H9OH+O2=

Science
Write correct formulas for the products in these combustion reactions.C6H6 + O2=

science
Pure PCL5 is introduced into an evacuated chamber and comes to equilibrium at 247C and 2 atm. The equilibrium gaseous mixture contain 40% chlorine by volume. Calculate Kp for the reaction.

Science (Chemistry)
An organic compound contains 49.2% Carbon, and 9.68% Hydrogen and 19.19% Nitrogen. If Molecular Mass of compound is 146. Calculate the Molecular Formula of compound.

Science
A boy is going from one place to another.He goes 100 m north and then 70 m east . Find the displacement of the boy from his starting point.

science
enumerate ways by wich you can practice 5 Rs the Reduce, Reuse, Recycle Respect and Responsibility.

science
if the same 1.0 kg book is lifted to 0.5 meters above the table, but the table top is 1.0 meters above the floor,, what would be the potential energy of the book if the reference level were the floor??

science
The oxidation number of cr in cr^3- is?

Science
An electric pump has 2KW power.How much water will the pump lift every minute to a height of 10meter?

science
A substance has a half-life of 10,000 years and an initial mass of 1,000 grams. How many years will pass before only 250 grams of the substance's parent material is left?

Science
How can we approach life scientifically?

Science
How many moles of oxygen are given by the complete decomposition of 1.225gram of potassium chloride

science
What is the sum of multiples of 8 in the given calender

Science
Measure the pressure of water being 1000kg/m×m×m and density and 40 kg weight on its base?

science
two small conducting spheres have charge 2nc and -0.5nc respectively. When they are placed 4 cm apart ,what is the force between them. If they are brought into contact and then seperated by 4cms. What is the force between them?

science
an 8 kg and a 16 kg block are suspended at opposite ends of a cord passing over a pulley. compute (a) acceleration of the system (b) the tension in the cord connecting the blocks and (c) the tension in the cord supporting the pulley. The weight of the pulley may be neglected.

science
A ball is thrown upward from the top of a 35-m tower, with initial velocity of 80m/s at an angle of 25 (a) find the time to reach the ground and the distance from the base of the tower to the point of impact (b) find the magnitude and direction of the velocity at the moment of...

science
define photosynthesis

science
give 10 example of suspencion

Science
Equal volumes of three liquids of densities ρ1,ρ2 and ρ3 , specific heat capacities c1,c2 and c3 and temperatures, t1,t2 and t3 respectively are mixed together , What is the temperature of the mixture ? Assume no change in volume on mixing

Science
Ben threw a ball up in the air with an initial velocity of 15m/s from a 17m high platform. A.What is the max height reached before failling down? B.How long was the ball in the air? C.What is the final velocity of the ball upon reaching the ground?

Science
A child has a fever. The temperature of his body is recorded as 103 degree farenheit by a thermometer . A doctor advised his mother to give medicine to lower the temperature. As we know evaporation causes cooling. The medicine given to child enhanced the evapouration. ...

Science
A lump of ice at -10 degree celsius weighing 0.80 kg is dropped into water at 0 degree celsius. If 0.005 kg of water freeze. Calculate the specific heat of ice.

Science
A calorimeter of water equivalent 50g contains 250g of water and 50g of ice at 0 degree celsius, 30 g of water at 80 degree celsius is added to it. The final condition in the system will be

Science
A 0.10 kg of steel ball falls on earth from a height of 10 m and bounces to a height of 1.0m . Let all the dissipated energy were absorbed by the ball as heat, calculate the rise in temperature if specific heat capacity of is 0.12 cal/g/deg C.

Science
Steam of 100 degree celsius is passed into ice of 100g . The mixture weighs 120g at 35 degree celsius, find the specific heat of ice.

science
A light string of length a is attached to two point A and B such that they on the same horizontal level and are separated b apart .A mass of P newton is theaded on the string such that it is vertically below B. show that temsion in string w[a^2+b^2)/2ab

Science
Generation and conduction of postsynaptic potentials and Integration of postsynaptic potentials and generation of action potentials How can these two relate to football players? Your thoughts?

science chemistry
One word of the chemical used to dissolve gold in the leach tanks with the aid of oxygen

science chemistry
One word for the chemical used to dissolve gold in the leach tanks with the aid of oxygen

science
Which of the following organs remove nitrogenous waste from the body?

forensic science
Why is the cross section of a fiber important? it is a distinctive trait of only natural fibers It is a distinctive trait of only synthetic polymer fibers it can vary significantly with the fiber it provides athe basis for the Beck line it determines the final color of the fibe

Science
Josh is a passenger in a roller coaster car. At the moment, his car traveling at a speed of 2.20 m/s at height of 15.0m. If his mass is 78.75 kg, what is total mechanical energy?

science
A bullet having a mass of 10g and moving with a speed of 1.5m/s penetrates a thick wooden plank of mass 90g. The plank was initially at rest. The bullet gets embedded in the plank and both moves together. Determine their velocity

creative play
Concepts of math, science, and social studies can be developed through the use of: A. community involvement. B. blocks. C. thematic intelligence. D. small motor equipment. B?

science
Consider a piece of gold jewelry that weighs 9.35 g and has a volume of 0.690 cm3 . The jewelry contains only gold and silver, which have densities of 19.3 g/cm3 and 10.5 g/cm3, respectively. If the total volume of the jewelry is the sum of the volumes of the gold and silver ...

science
Gametes are hiploid cells.What do you think would happen if the gametes forming a zygote are diploid.

Science-Chemistry(mole concept)
How many kg of wet NaOH containing 15% water are required to prepare 70 litre of 0.5N solution?

creative play
Stocking a math or science center with different sized manipulatives would be an appropriate modification for children with __________ issues. A. fine motor B. gross motor C. speech D. behavioral A?

Science
What would be the temperature above 70 feet, if ground temperature is 45 degree centigrade?

Science
The liquid waste produced ________ is collected by the kidneys and passes through the __________ to the ___________, ______________. The urinary bladder is a strong muscular organ that stores the urine until it can be excreted via the _________

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