Sunday
December 11, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

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?
Sunday, October 2, 2016 by Marwa

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
Sunday, October 2, 2016 by makagona makamachi

Science
What is the ph scale used for?
Sunday, October 2, 2016 by Priscilla

science
an incident ray makes an angle of 20 degree with the plane mirror.what would be the measure of angle of reflection?
Sunday, October 2, 2016 by Tanisha sengupta

Science
Calculate the molarity of 10 % HNO3 (w/w) solution if its density is 2.0 g/cc at 25° C.
Sunday, October 2, 2016 by satyam kar

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 ...
Saturday, October 1, 2016 by David

Physical science
What is the wavelength of a standing wave in cm, if the separation between two adjacent nodes is 13.7cm?
Saturday, October 1, 2016 by tammy

science
some have more than a 100 some hav none
Saturday, October 1, 2016 by science

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?
Saturday, October 1, 2016 by CC

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
Saturday, October 1, 2016 by Vivek

science
1. What is the main difference between mechanical and electromagnetic waves A. Mechanical waves involve transfer of energy; electromagnetic waves do not. B. Mechanical waves require a medium to travel in; electromagnetic waves do not. C. Mechanical waves have amplitude and ...
Friday, September 30, 2016 by jacob

Science
If the frequency of middle-C is 44Hertz, what is the wavelength of the sound in centimeters?
Friday, September 30, 2016 by Tari

science
A displacement vector r in the xy plane is 15m long and directed ...
Friday, September 30, 2016 by Zeshan

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 ...
Thursday, September 29, 2016 by Anonymous

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 ...
Thursday, September 29, 2016 by Anonymous

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.
Thursday, September 29, 2016 by Arun

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 ...
Thursday, September 29, 2016 by P

Science (check my answers)
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?
Thursday, September 29, 2016 by FluttershyK

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 ...
Thursday, September 29, 2016 by Anonymous

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.
Thursday, September 29, 2016 by PLS HELP

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 ...
Thursday, September 29, 2016 by ttng

Science
How much energy is needed to raise the temperature of 2.0kg of aluminium by 30oc
Thursday, September 29, 2016 by Anonymous

Science
measure the pressure of (water being) 1000kg/mmm density and 40 kg weight on its base
Thursday, September 29, 2016 by Bikram

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.
Thursday, September 29, 2016 by Ibrahim

science
A ball thrown vertically upwards with an initial speed of 24.5m/s.Calculate the greatest height it will stain.
Thursday, September 29, 2016 by Maxwell

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 ...
Wednesday, September 28, 2016 by kurt

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?
Wednesday, September 28, 2016 by Marilyn

Science
What is the answer for 3g of sugar in 300ml of water
Wednesday, September 28, 2016 by Anonymous

Science
in scientific inquiry what is communicating?
Wednesday, September 28, 2016 by Travis

Science
What would the density of 8 g of the unknown substance from Zarkon be
Wednesday, September 28, 2016 by Jennifer

AGRIC SCIENCE
WHAT IS THE SCIENTIFIC NAME OF CATTLE
Wednesday, September 28, 2016 by APY QUEEN

AGRIC SCIENCE
WHAT IS THE BOTANICAL NAME OF CATTLE
Wednesday, September 28, 2016 by APY QUEEN

maths /science
A body calling from rest has a velocity of 25m/s at given instant. Calculate 1 the distance the body has fallen 2 the time taken
Wednesday, September 28, 2016 by christina

maths/science
A body falls from a position of rest at the top of a tall building and attains a velocity of 63.7m/s just before striking the ground. Calculate the time for the body to fall from the top of the building to the ground
Wednesday, September 28, 2016 by christina

Science , Earth , Waterce , Earth , Waterce
How can I answer this question? Draw an overall conclusion: how does water compare to other substances? Why do you think so? Please help me...
Wednesday, September 28, 2016 by CC

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 ...
Wednesday, September 28, 2016 by kurt

Science
Which of the following is a good study habit? A - maintaining a positive attitude B - waiting until the last minute to start on an assignment C - listening to the television while studying D - studying when you are tired A. ?
Wednesday, September 28, 2016 by Carla

Evironmental Science
All of the following make up the three major categories of environmental problems except? a. loss of biodiversity. b. overpopulation. c. resource depletion.
Wednesday, September 28, 2016 by Brandy

science
Find the gravitational acceleration if a spaceship at a distance equal to double of earth's radius from the centre of the earth (g on earth is 9.8 m/s^2)
Wednesday, September 28, 2016 by pruthviraj

science
How do I make an acrostic poem for reactants?
Wednesday, September 28, 2016 by emily

science
A force of 5N gives a mass M,an acceleration of 18ms-2qnd a mass m,an acceleration of 24m s-2.what acceleration wouldit give if both the masses were tied together?
Wednesday, September 28, 2016 by arsh

Science
So I have an 89% in my science class and we took a test worth 15 points. I only got 8 correct which is an F. I have 2 A's, a B, and a D as the other grades in the grade book. How will this F affect my grade? I need it to stay a B
Tuesday, September 27, 2016 by Laila

science
Force is exerted to move a body of mass 50kg from 2 m/s to 5m/s over a period of 10 seconds.draw a velocity time graph regarding the same and calculate the value of force.
Tuesday, September 27, 2016 by nafiya

science
A person is travelling in the east direction with a speed of 2 km/hr with respect to the ground. he finds that the wind seems to blow from north. When he doubles his speed, the wind appears to come from north-east direction. determine the velocity of wind.
Tuesday, September 27, 2016 by natasha

science
will the mass of an object ever equal its volume. Give an example of two things that may have the same volume but a different mass?
Tuesday, September 27, 2016 by Anonymous

Science
What is the difference between latitude and longitude
Tuesday, September 27, 2016 by Ugly trump face

science
Draw and label a diagram of a nitrogen atom. It should have 7 protons,7 neutrons, and 7 electrons
Tuesday, September 27, 2016 by Jack

science
If an object has a mass of 56g and a volume of 22cm', will the object float in water? explain your answer.
Tuesday, September 27, 2016 by viv

Science
Mass is measured in grams, accelaration is measured in meters per second squared, and distance is measured in meters. Force is equal to mass times sccelation, and work is equal to force times distance. What is the unit of work?
Tuesday, September 27, 2016 by Jessie R.

Science
I need help finding two examples of natural social systems
Tuesday, September 27, 2016 by Kendra

Science
How do scientist work
Tuesday, September 27, 2016 by Anderson

Science
when a current is passed through water during the process of electrolysis,two gases are formed. One gas has formed has a boiling point of -256 degrees celsius.Has a chemical or physical change occurred? Explain. ok i've already answered just need a few more sentences. This...
Tuesday, September 27, 2016 by Senpai onii-chan

science
A body travelled from rest with acceleration 8m/s-2 find its velocity if the distance is 100m
Tuesday, September 27, 2016 by Busayo

Science
Can someone please explain how to do dot and cross diagrams. Thanks
Tuesday, September 27, 2016 by Rebecca

computer science
____________ is an application program included with Windows that allows the contents of the computer, the hierarchy of folders on the computer, and the files and folders in each folder to be viewed.
Tuesday, September 27, 2016 by marry

Science
What propity makes a metal useful in a electical devices
Monday, September 26, 2016 by Kaitlyn

physical science
Find the gravitational force between two 20 kg spheres that are separated by 4.0 m.
Monday, September 26, 2016 by heydi

Science
A substance has melting point of 0 Celius and a boiling point of 100 Celius. The substance is most likely * water * hydrogen * gold * table salt
Monday, September 26, 2016 by Plurp

Physical Science
which of the following is a physical change? * sawing a piece of wood in half * burning a piece of wood * rust forming on an iron fence * a copper roof changing color from red to green.
Monday, September 26, 2016 by Soccer #18

Science (Please help!!)
creating a prototype and troubleshooting are steps in the development of a: a new scientific theory b: a new experiment c: a new scientific law d: a new technology ******* Please help =)
Monday, September 26, 2016 by mia larson

Physics
A science student is riding on a flatcar of a train along a strait, horizontal track at a constant speed of 12.0 m/s. The student throws a ball into the air along a path he judges to make an initial angle 65. deg with the horizontal and to be in line with the track. The ...
Sunday, September 25, 2016 by Mary

Please help do by 10:00 Science
1. Convert 4.0 kilometers (km) to meters (m). (1 point) 0.04 m 40 m 400 m 4,000 m 2. For his science project, Austin wants to determine if the pH of standing rainwater changes over time. He collects a jar of rainwater and places it indoors in a spot that does not receive a lot...
Sunday, September 25, 2016 by BLOB

Science
If a cell membrane is both permeable to salt and water, what will immediately occur?
Sunday, September 25, 2016 by Hayden

Science
The mass of astromout measured on earth in 8500g. What will be his weight on earth
Sunday, September 25, 2016 by Matred

science
what is the focal lenght of an object 10cm in front of a convex mirror having image that is 5cm behind the mirror?
Sunday, September 25, 2016 by Anonymous

science
1. If person weighs 176 lbs on earth what is his or her mass on mars where the force of gravity is 37% of that on earth. With Complete solution
Sunday, September 25, 2016 by sky

Science
a freight train must approach a road crossing at 16km/h. after passing through the intersection, the train speeds up to 65 km/h, taking 10 min to do so. what is the train's acceleration during this time in meters per second squared
Sunday, September 25, 2016 by Nhipham

physical science
How much would a 81.4 kg person weigh on Venus, where the acceleration of gravity is 8.87 m/s2?
Saturday, September 24, 2016 by Natosha

Science
If you have 25 glucose molecules transporting out to 5 glucose molecules how will the molecules need to move to reach equilibrium? Out
Saturday, September 24, 2016 by Hayden

science
what is the difference between the momentum of a 2,500 kg honda moving at 40 m/s and a 2,500 kg honda moving at 15 m/s whats the formula? or answer
Saturday, September 24, 2016 by unknown

Science
A car moves at 20 meters in 2 seconds. What is the momentum of the car if it has a mass of 3,000 kg? A football player runs across the field for a tackle. He has a momentum of 1,120 kg x m/s and is moving down the field at 10 m/s what is the mass of the player? Anything helps ...
Saturday, September 24, 2016 by YOLANDA

Science
How do acidity and surface area affect the weathering of most materials? Can you also provide me with a website to read about this as well. I don't know
Saturday, September 24, 2016 by Matt-Please Help

Science
1. What number on the pH scale is the strongest acid? 2. What number on the pH scale is the strongest base? Can you please help me with this. I am not sure.
Saturday, September 24, 2016 by Matt-Please Help

Science
You can jump 2 feet vertically on Earth. Figure out how high you would be able to jump on the Moon, where acceleration due to gravity is ⅙ that of Earth. Assume you launch upwards with the same speed on the Moon as you do on the Earth." I've already measured how...
Saturday, September 24, 2016 by BunBun

Science
Q1-Who gave the equation (E=MC^2). Q2-Who gave the equation (V=IR). Q3-What was Newton's second law?. Q4-What was Newton's first law?.
Saturday, September 24, 2016 by Varun Dhawan

SCIENCE
The intensity of solar radiation at the surface of the earth is 1kW/m2 . A roof has a square solar panel of sides 10m that absorbs the radiation completely. What is the average force exerted on the panel?
Saturday, September 24, 2016 by OWOLABI

Science
The binding energy of election is 13.6 v .the loss of mass in formation of h atom is
Saturday, September 24, 2016 by Jinkal

Science
A 0.5kg mass connected to a light spring of constant 20N/M occilates on a frictionless track. Calculate the total energy of the system
Friday, September 23, 2016 by Charles

Science
I have a 91 as my average now. I only have two weeks left. What do I need to get and a (93)?
Friday, September 23, 2016 by Lexi

science
How many mole of FeSO4 with one mole of KMnO4 in acidic medium?
Friday, September 23, 2016 by yogita

science
Compare the costs and benefits of hydropower to that of geothermal power. (Please include two costs and two benefits.)
Friday, September 23, 2016 by Leah

Maths, science
An open box with square bases is to be made out of a given quantity of cardboard of area Csquare. show that the maximum volume of box is ccube/6√3cubic unit
Friday, September 23, 2016 by Rishab

science
The atomic number of gold is 79 how many neutrons are there in an atom of gold that has atomic mass of 197 amu how you got your answer
Thursday, September 22, 2016 by Bryan

science
One proposed project to help restore Louisiana's wetlands is to backfill canals that were built for access to and transportation of oil from the coastal area. why might scientists first want to build and study a model of their proposed project? Help!!
Thursday, September 22, 2016 by hannah

Physical Science/ Chemistry
Which of the following shows the correct order of Family #1 elements from least to most reactive? A) Li, Na, Rb, K B) Li, Na, K, Rb C) Rb, K, Na, Li D) Li, Na, K, Ba
Thursday, September 22, 2016 by Kayla

science
How many grams of sodium carbonate,Na2CO3,are required to make a 0,2M solution?
Thursday, September 22, 2016 by Ngurimuje

Science am i correct?
What are the 4 ways a blood borne pathogen could enter the body's blood stream? Ingestion Inhalation Absorption Skin to blood contact Injection I choose abc and d am I corrct6?
Thursday, September 22, 2016 by Scooby

Science
Which of the following are ways u could contract a blood borne pathogen? Semen.toilet seats.vomit. mucous membrane secretions. Blood to blood. Mosquitos My answer is semen and blood to blood. Am I correct?
Thursday, September 22, 2016 by Scooby

Computer science
How does virtual memory work? Thanks.
Thursday, September 22, 2016 by Anonymous123

math
Each test grade in Sara's science class counts for 1/6 of the final grade. The final exam counts for 1/2. Sara's test scores are 72, 84, and 90. Her final exam score is 90. What is Sara's final grade for the class? A) 83 B) 86 C) 87 D) 89
Thursday, September 22, 2016 by Scribble

Physics science - forces
A jet plane lands on a runway and decelerate so to rest. What can you say about the direction of the resultant force on the ane as it decelerates? What can yu say about the resultant force acting on the plane as it has come to rest? Many thanks.
Thursday, September 22, 2016 by Anonymous123

computer science
draw a flowchart and write the algorithm for printing the first 10 even numbers
Thursday, September 22, 2016 by surya

science(physics)
A powerful motorcycle can accelerate from rest to 28m/s in only 4 second . a.what is its average acceleration? b.how far does it travel in that time
Wednesday, September 21, 2016 by nancy

Science
If two person sitting on a sea-saw has different weights,how can thay balance the sea-saw
Wednesday, September 21, 2016 by Chrystalee

Science
We call zone of saturation the level to which the water fills all the interstices, or the pores, with the ground and all cracks minusclus of the rock/this fresh water supply exists in all the grounds. Why?
Wednesday, September 21, 2016 by Alyssa

Science
what geographical features create natural boundaries for water to flow toward one ocean or another?
Wednesday, September 21, 2016 by Alyssa

science
can someone check my answers? 1) which of the following statement about igneous rocks is correct? A. intrusive igneous rocks are formed when magma is cooled above the ground. b. extrustive igneous rocks are formed when magma is cooled above the ground. c. extrusive igneous ...
Wednesday, September 21, 2016 by mole

Science
1.Which of the following is a good study habit? A.maintaining a positive attitude ** B.waiting until the last minute to start on an assignment C.listening to the television while studying D.studying when you are tired 2. Your friend John complains about his poor grades. You go...
Wednesday, September 21, 2016 by Dylan Webster

Science
A. How could the scenario have been prevented? B. How should the student respond in the scenario to minimize the harm? During an experiment,Carin carefully pours solution A from a test tube into a beaker.Krystal sneaks up behind Carin to wish her a happy birthday.Carin ...
Wednesday, September 21, 2016 by Adlyn

Science
2. Your friend John complains about his poor grades. You go to his house to study one day. The only place John has to study is at the kitchen table. While you are there, his younger brothers run through the kitchen screaming over and over again. What advice would you give ...
Wednesday, September 21, 2016 by Lily p

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