# Science

## Recent Questions

Math
William answered 27 out of the 36 questions on his science test. What precent of the test did William answer?

Science, Nature Sciencence
Metabolism – Reproduction – Sensitivity – Homeostasis – Excretion – Nutrition – Growth – Is these all of Functions of life?

science/math
how many mL is equal to 0.155 Molar HCL?

science
If 156 grams table salt in 500 grams water without changing the temperature,will all solute particles dissolve?

Science
Which dam must be stronger, one that holds back 100000 m3 of water 10 m deep or one that holds 1000m3 0f water 20m deep? Why?

Science
The position of particle moving along x axis is given as a function of time t as x=t^2-4t+7.the distance covered by the particle in first four second is(x is in metre and t is in second). Plzz answer fastly..plzz

Science
A piece of lead at 100 degrees celsius has a mass of 500 grams. It is placed in a 200 grams of water at 20 degrees celsius that is contained in an aluminum caloriemeter with a mass of 400 grams. If the final temperature of lead, water and caloriemeter is 24 degrees celcius, ...

physical science
A baseball is thrown a distance of 20 meters from the outfield to 3rd base. What is the baseball's velocity if it takes2.3 seconds to get to the third basemen? How would I solve this?

science
when one boy is sitting 1.20 meter from the center of he seesaw the girl must sit on the other side 1.50 meter from the center to maintain an even balance . however the boy carries an additional mass pf 14 kg and sit 1.80 meter from the center the girl must move to 3 meter ...

science
Calculate the resistance of a copper wire cross section area 2*10_2 the resistivity of wire is 1.67*10_ohm metre

science
A sample of calcite have 50%cao 40% L.o.i.calculate %of caco3?

science
You need to make a 2 fold serial dilution starting at 1:100 and ending at 1:3200. You need 2 ml in each test tube when you are finished. You have 40 microliters of serum. do you have enough?

Science
Where can I look and/or what website can I look at for the different components of the scientific method process? Please help

Science
What is a bird speed flying at 12 m/s with a crosswind at 20 m/s

Science
Calculate the number of moles of hydrogen gas that would be displaced from 52grams magnesium

Science (Chemistry)
"Calculate the amount of heat (kcal) released when 18.0 g (grams) of steam are condensed at 100.0 C and the resulting water is frozen and cooled to 25.0 C." The only problem that I'm having is the amount of physical and temperature changes that there are. I'm new and still ...

Science
Which of the following would have the greatest force? An object with low mass accelerating slowly An object with low mass accelerating quickly** An object with high mass accelerating quickly An object with high mass accelerating slowly Is is B?

Science (Chemistry)
"Calculate the amount of heat (kcal) released when 18.0 g (grams) of steam are condensed at 100.0 C and the resulting water is frozen and cooled to 25.0 C." The only problem that I'm having is the amount of physical and temperature changes that there are. I'm new and still ...

science
if two plane mirrors are placed parallel to each other. A ray strikes at an angle of 45 degree thn how many images can be seen? If point object is placed on principal axis of a convex lens made up of two different material( above pole and below pole different material) How ...

science
what is the effective resistance of the parallel of 40 ohm and 60 ohm

Earth science
If the volume in a graduated cylinder is raised from 50ml to 51 ml, what is the objects volume?

Science
How to figure the density of: Mass = 30 grams Volume = 10mL

Science
How do humans grow crops on land that would naturally be either too dry or too wet ? Explain

Science
Do tongue prints are also unique as finger prints?

Science
similarities between naturopathic medicines to Aboriginal healing medicine.

Science
Two fixed particles of changes 1 micro coulomb and 3micro coulomb are 10cm apart. How far apart from each other should a third charge be placed so that no net electrostatic force acts on it.

Science
1.) Why is it important to have a quiet study space? It is easier to concentrate in a quiet space, and concentration is needed to learn. * It is easier to leave all your study material in a quiet study space so you can find it. A quiet study space prevents incorrect ...

Science
What conflicts between humans and robots might occur in the future? Plzz Help!

Science
A chemical element with the symbol X has the electron arrangement 2,8,6 (electron configuration 1s2 2s2 2p6 3s2 3p4). Which chemical species is this chemical element most likely to form?

Math
The table shows which school subjects are favored by a group of students predict the number of students out of 400 that would pick science as their favorite subject.

Science
My assignment is to make an experiment to investigate the effect different forces have on an object’s motion. And this should test at least one of the laws of motion. Now all I ask is an example of an experiment I could do. I'm having trouble coming up with an idea to ...

SCIENCE-BONES-NEED HELP
Do all bones store fat and produce blood cells? And do all bones contain yellow and red bone marrow? Im talking about the hand bones (phalanges, carpals, metacarpals)Thanks!

SCIENCE-BONES-NEED HELP
Do all bones contain bone marrow? (Im specifically talking about the hand bone) Please give me any information on bones, joints, muscles, ligaments, tendons, cartilage, and changes of the hand. I have some, but I want more info. Please help me! Thanks!

Science,chemistry
How do I write a balanced half ionic equation of aluminium oxide at the cathode?

Science
a bubble be jump straight up with a velocity of 4.0 m/s what is his displacement of after 1.80s

Physics/Science
I'm in 7th grade and I have a writing assignment that our teacher said "do your best" as an explanation. My best would be to call out sick the rest of the year! Hear goes. Explain the scientific accomplishments of Stephen Hawking. How dis his accomplishments affect he world? ...

Science
what weight of NaCl is needed to prepare 200mls of a 250ppm Na solution?

Science
begin your discussion by sharing your observations on what organisms need to grow. Also discuss ways in which human activity can impact an organism’s ability to obtain the resources it needs to survive. Share your opinion about how human activity can be changed to have less ...

Science
Are these good scientific questions (they are written in reference to a computer simulation)? 1. How does the range of the object change as the initial speed and drag coefficient get bigger? 2. Does air resistance affect the time taken for the object to complete its trip? 3. ...

our topic is cell -it is the main component of the plant cell wall

Science
I need to unscramble these letters to make a phrase rorpsggnloadeeasi

science
which of the following is true about photosynthesis

Science
What has more potential energy a bowling ball or a basketball on a ledge 10 feet off the ground? Why? 1 paragraph

science
Two concentric conducting spherical shell have raddii R1=0.145m and R2 =0.207m. The inner sphere with negligible speed. Assuming that the region between the sphere is a vacuum, compute the speed with which the electron strikes the outer sphere.

Science
If a train is traveling 200km/h east and a bee is traveling 20km/h west, can the bee stop the train

Science
A gene is to a chromosome as _______. a) a pea is to as a pod b) a front is to a back c) a bike is to a car d) a building is to a window I think it is a.

Science
A scientific hypothesis must be , A or d? Correct Able to be manipulated Able to control Able to test

Science
Carbon could be classed as a metal true or fales

Science
Carbon could be classed as a metal

science
importance of utilizing natural energy in architecture

Science
Two boys A and B are at two diametrically opposite points on a circle. At one instant the two start running on the circle; A anticlockwise with constant speed v and B clockwise with constant speed 2v. In 2 minutes, they pass each other for the first time. How much later will ...

Science homework
john is on a skiing holiday. he starts from rest on a long gentle incline of 6° and the coefficient of kinetic friction between the skies and the snow is 0,06. the weight of john and his skies is 800 n., traveling 100m

science
The following replicate values were reported for the concentration of magnesium chloride, MgCl2, in mol/L. What value should be reported as the mean concentration of the chloride ion, Cl, converted to ppm? (You may use the simplified definition of ppm.)0.00141, 0.00138...

Science
john is on a skiing holiday. he starts from rest on a long gentle incline of 6° and the coefficient of kinetic friction between the skies and the snow is 0,06. the weight of john and his skies is 800 n. Traveling 100m

science
A crane accidently drops a box full of material into a freshwater pool measuring 20 feet long, 10 feet wide, and 6 feet deep before the box is dropped causing the water level to rise to 6.05 feet after the box is dropped. The box is 10x8x12 inches and the material inside ...

Science
What is the acceleration of a kg object if force of 3 n is applied to it?

Earth Science
which two criteria must be met before scientists can use radiocarbon dating? I need serious help dudes lol

science
A gymnast is performing a routine on the trampoline. At the beginning of each jump, she leaves the trampoline with a vertical velocity of 7.4 m/s upward. What is her vertical acceleration when she is at the apex of each of her jumps?

science
6.023*x10^21 electrons are present n a given amount of ammonium (NH3).How much amount of hydrogen is required to produce the sample of ammonia

Science, Nature Science
Can you please give me three examples of things that photosynthesize that live in oceans?

Math
Rita needs to measure out 3.5 gallons of vinegar for a science experiment However, her only measuring tool is a measuring cup that holds 1 cup. How many cups of vinegar does she need? I am confused on this can you please help me?

science
Water has a density of 1g/ml. If an object has a densidy of less 1g/ml will sink or float?

Science (Chemistry) (Measurement Uncertainty)
Three students are asked to determine the mass of a coon. They each measure different values for the mass of the coin using a balance. Student A recorded a mass of 63.08g, student B recorded a mass of 63.022g and student C recorded a mass of 63.0328g. If the balance is ...

science
Describe how you will prepare 500cm of 1M nacl

Science
what steps are important in the process of creating a scientific theory A) Hypothesizing,observing,and testing. B) Creating a prototype and trouble-shooting. C) Analyzing,Offering an opinion, and evaluating D) Trouble-shooting,hypothesizing,and evaluating. Help Me!! please

science
T or f,if false,explain why.volume is measurement of how much matter is in an object

Science
Answer with solution, plz. 1. What is the concentration of the solution by volume when dissolved is used 30 grams & the water is 60 grams. 2. How much solvent in grams is present in a solution with a concentration by volume of 40% the solute of content is 60 grams.

science
A man of mass 50kg is walking on a long wooden board of mass 200 kg. The wooden board is initially at rest on a frictionless ice surface. If the man walks with a velocity 1m/s in the positive x direction relative to the wooden board,find the velocity of the board in m/s?

Science, Nature Science
Can you give me three examples of things that photosynthesize that live in oceans?

Science,
Why don’t bodies of water freeze in the winter, even when ice or snow forms?

Science, Nature Science,ence, Nature Science,ence
How does water help us stay cool?

Physical science
A piece of metal has a mass 85 cg and a volume of 450L. What is the density g/cm cubed? What would be the mass of 300 cm cubed of this metal? What would be the volume of 200 ounces of this metal?

physical science
a car travels 50km east in 30 mins. what is the velocity in km/h

Science
The resistance is obserbed to be raised by4 times how many times the lenth has to b changed by keeping area constant

Science
The fastest growing plant on record is the hesperoyucca whipplei suppose a plant of this type grows 2.5 m in 14 days, what is the growth rate in micrometer per second?

computer science java
write a program in java for a grocery (fruit shop calculate the prize of bananas @ \$.89/kg declaring the the prices of all either as instances or class variables.declare the weight of the fruit as local variables

Science
What is the ph scale used for?

science
an incident ray makes an angle of 20 degree with the plane mirror.what would be the measure of angle of reflection?

Science
Calculate the molarity of 10 % HNO3 (w/w) solution if its density is 2.0 g/cc at 25° C.

Science, NATS
Consider the following chemical reaction. Molecular hydrogen and carbon dioxide react to form water and methane. H2+CO2-->H2O+CH4 A)Explain why this equation is not balanced and what law of nature does it break in its current form? B) Astronauts from the Earth carry large ...

Physical science
What is the wavelength of a standing wave in cm, if the separation between two adjacent nodes is 13.7cm?

science
some have more than a 100 some hav none

Science, Nature Science,
Give 3 examples of nutrients that WE NEED in our bodies that are soluble in water. Give 3 examples of gases that are soluble in water. Could you please help me these questions?

Science
a stone mass of 2.5kg is falling a certai height. Find the force of attraction between the earth and the stone. Also find its acceleration

Science
If the frequency of middle-C is 44Hertz, what is the wavelength of the sound in centimeters?

science
A displacement vector r in the xy plane is 15m long and directed ...

Science
From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces the window. (y = 0.44 m, and x = 6.8 m.) Using ...

Science
From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces the window. (y = 0.44 m, and x = 6.8 m.) Using ...

Science
A piece of wire of resistance R and cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R1 then the ratio of R and R1 is what.

Science
Compounds with high melting points have ___ a. Covalent bonds b. Metallic Bonds c. Ionic bonds*** d. No chemical bonds How could you determine if a sample of gold is pure? Compare the sample's density with that of pure gold.*** Compare the sample's color with that of pure gold...

1. In plants, sexual reproduction occurs when sperm and egg unite to form a... a. gamete b. gametophyte c. sporophyte d. zygote Is it d?

Physical science
A golfer on a level fairway hits a ball at an angle of 42* to the horizontal that travels 100 yd before striking the ground. He then hits another ball from the same spot with the same speed, but at a different angle. This ball also travels 100 yd. At what angle was the second ...

Science
Describe what makes a mineral unique from other substances. This is (my answer) Its not a lot tho :( Answer:A mineral is a natural occurring crystalline. Minerals are naturally occurring. PLS HELP It's worth 4 points.

science
Both carbon dioxide and water are pure substances. How are they similar to each other? A. both substances have a set ratio of atoms that cannot be separated by physical means. B. both substances have a set ratio of atoms that can be separated by physical means. C. both ...

Science
How much energy is needed to raise the temperature of 2.0kg of aluminium by 30oc

Science
measure the pressure of (water being) 1000kg/mmm density and 40 kg weight on its base

science
Iron is obtained by reduction of iron(iii)oxide gas in a blast furnace.calculate the amount of iron(iii)oxide needed to produce 100tonnes of iron.

science
A ball thrown vertically upwards with an initial speed of 24.5m/s.Calculate the greatest height it will stain.

computer science
Acarrentalcompanyusesthefollowingtableto​helpcomputerentalfees. TABLE 9.3 Car Type Chevrolet Corvette Pontiac Buick Oldsmobile Cadillac Rate per Day 50.00 85.00 53.00 60.00 60.00 70.00 Rate per Mile 0.27 0.45 0.32 0.32 0.35 0.40 Write a program to calculate car rental ...

science
if the ball that was thrown to a fried has a mass of 0.15kg and it accelerates at 20m/s, what force did you exert on the ball?