Wednesday
December 7, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

science
a stone is thrown at an angle of 30* with the horizontal direction which strikes the tip of the building 2 m height ,if the distance of the building from the point of observation is 10 metre .find the velocity of the projectile of the stone. ans...
Friday, November 4, 2016 by nirmal kumar

science
a stone is thrown at an angle of 30* with the horizontal direction which strikes the tip of the building 2 m height ,if the distance of the building from the point of observation is 10 metre .find the velocity of the projectile of the stone.
Friday, November 4, 2016 by nirmal kumar

Math
Pedro spent 2 1/5 hours on his math himework and half as lomg on his science homework one weekend. If his english and social studies homework took 7/8 as long, how much time did he spent on homework that weekend?
Friday, November 4, 2016 by Anthony

Algebra
During a science experiment, Nico created a 32%alcohol solution by mixing 8 fluid ounces of a 50% alcohol solution with a certain amount of an 8% alcohol solution. How many fluid ounces of the 32% alcohol solution did he create?
Friday, November 4, 2016 by Jj

Science
0.745 g of kcl disloved in 100 ml of water,then molarity?
Friday, November 4, 2016 by Sonu

Science
A stone projected vertically upwards with a velocity of 20m/s. Two seconds later, a second stone is similarly projected with the same velocity. When the two stones meet, the second one is rising at a velocity of 10m/s. Neglecting air resistance, calculate the (i) lenght of ...
Thursday, November 3, 2016 by Nifes

Science
Is red hair mutated?
Thursday, November 3, 2016 by Emma hughes

science
what do mangroves ecosystem provide for organisms
Thursday, November 3, 2016 by Taylor

Science
A community obtains electricity from a coal plant. This coal plant produces pollution that has caused environmental problems in the lakes, streams, and forests within the community. What kind of secondary pollution has the coal plant most likely produced, and what kinds of ...
Thursday, November 3, 2016 by Solara

Science Psysics
A 6 kg black is placed at the very top of a ramp that is inclined at 31 degrees and the block is released to slide down the ramp. As the block slides friction exerts a constant resistive force of 17N directed back up the ramp What is the block's speed when it arrives at ...
Wednesday, November 2, 2016 by Amy

Science
name two types of evidence used to support the theory of evolution explain how scientists use each type of evidence to provide support for evolution give one example for each
Wednesday, November 2, 2016 by LEgit_VIPer

Science
Without. Specie is not able to survive
Wednesday, November 2, 2016 by Kahvon

Science
How is a parallel circuit different from a series circuit? A: A parallel circuit only has one path for the circuit to take. B: A parallel circuit has more than one path for the circuit to take.** C: A parallel circuit has a broken path for the circuit to take D: A parallel ...
Wednesday, November 2, 2016 by Marry Hernandez

Art
Which of the following subjects enabled artists to begin using clay to form art? 1. Language arts 2. Social Studies 3. Mathematics 4. Science *** I think its D.
Wednesday, November 2, 2016 by Check this? Please...?

science
Determine the magnitude and direction of the horizontal resultant force on minibus A=1800N and B=800
Wednesday, November 2, 2016 by daisy

science
A species that influences the survival of many other species is an ecosystem is called a(n) (A) Niche species (B) Extinct species (C) Keystone species (D) Endangered species
Wednesday, November 2, 2016 by 220134

Science
Students were given materials to complete a circuit to turn on one light. The materials received were 2 wires,AA battery, and various sizes lightbulbs.What is the variable in the experiment? Wires,battery, size of lightbulb, or time of day
Tuesday, November 1, 2016 by Terry

Science
An object accelerates at 7.5m/s^2 with a force of 25N west being applied to it and there is a frictional force of 13N. What is the mass of the object
Tuesday, November 1, 2016 by Taylor

Science
If an object with a mass of 98kg at 2.5m/s^2, what amount of force is applied to it?
Tuesday, November 1, 2016 by Taylor

Science
a toy car starts from rest and accelerate uniformly at 2.0m/s square for 5.0 seconds. calculate its final velocity
Tuesday, November 1, 2016 by Clinton Darlington Yartey

Science
A car starts from rest and attains a velocity of 40 metres per second in 20 seconds. it maintains this velocity for 30 seconds and then comes to rest in 25 seconds. 1. sketch the velocity time graph for the motion.
Tuesday, November 1, 2016 by Clinton Darlington Yartey

Science
A car starts from rest and attains a velocity of 40 metres per second in 20 seconds. it maintains this velocity for 30 seconds and then comes to rest in 25 seconds. Calculate the total distance covered by the body
Tuesday, November 1, 2016 by Clinton Darlington Yartey

Science
A car starts from rest and attains a velocity of 40 metres per second in 20 seconds. it maintains this velocity for 30 seconds and then comes to rest in 25 seconds. 1. sketch the velocity time graph for the motion. 2. Calculate the acceleration of the body. 3. Calculate the ...
Tuesday, November 1, 2016 by Clinton Darlington Yartey

science plz correct me
Which of the following boxes would have the strongest gravitational pull on a third object positioned at an equal distance from both boxes? Box A: 100 g Box B: 10,000 g A. box b because it has more mass B. box a because it has less mass C. box a because it is bigger*** D. box ...
Tuesday, November 1, 2016 by cat

science
according to ohms law what is the resistance of a lightbulb if that applied voltage is 21.0 V and the current is 3.0 amps? 24 ohms 7.0 ohms** 18 ohms 3.0 ohms
Tuesday, November 1, 2016 by cat

Science 7
Which of the following boxes would have the strongest gravitational pull on a third object positioned at an equal distance from both boxes? Box A: 100 g Box B: 10,000 g A. box b because it has more mass B. box a because it has less mass C. box a because it is bigger D. box b ...
Tuesday, November 1, 2016 by cat

Science 7
1. A student studying a circuit diagram of a lightbulb, battery, and a switch correctly identifies it as a closer circuit. In this diagram, The lightbulb would be a. an insulator b. on*** c. disconnected d. off 2. The focus of gravity on an object on the surface of Mars is ...
Tuesday, November 1, 2016 by cat

science
Complete the table by writing the result of each weather pattern. Choose from the following: cold wave, drought, flood, heat wave. Weather Pattern Result 19.?Thunderstorm remains over an area for many hours 20.?Extended period of well-below-normal rainfall 21.?Extended period ...
Tuesday, November 1, 2016 by Kacie

science
The intense updrafts and downdrafts that characterize severe thunderstorms are the result of what? Thanks!
Tuesday, November 1, 2016 by Katie

science
kinsey leaves her house to exercise and run straight down a long street for 5.00 meters at a constant rate of 3m/s then turns and run back toward her house for 2 meters what is her average speed in m/s what is her displacement what is her average velocity in m/s
Tuesday, November 1, 2016 by chris

science
a stone weighing 0.2kg tied to the end of the string 0.6m long whorld in a horizontal circle in a speed of 150 revolutions per minute. calculte the tension and string
Tuesday, November 1, 2016 by physics

Science
A tree that sheds its leaves in the fall is exhibiting. A geotropism B photomotropism C phototropism D photoperiodism
Monday, October 31, 2016 by Julia

Science
What caused the syringe to leave a puddle of water after sitting in the sun for 10 minutes ?
Monday, October 31, 2016 by Anonymous

Science
a student made an electromagnet using a battery electrical tape and metal wire. she wanted to see what the effect would be if she switched the side of the battery she connected each end of the wire to. which of the following would be a correct conclusion? a. switching the side...
Monday, October 31, 2016 by machile

Science
Imagine Two Artificial Satellites Orbiting Earth At The Same Distance. One Satellite Has A Greater Mass Than The Other One? Which Of The Following Would Be True About Their Motion? A.The satellite with the greater mass is being pulled toward Earth w/ less of a force than the ...
Monday, October 31, 2016 by cat

Sand Dunes (Science)
Every year, Eli and his family visit the Great Sand Dunes desert in Colorado. Eli notices that more sand dunes with varied shapes and sizes appear each year. Explain what causes this phenomenon. PLZ DO NOT SAY WIKI!!!!!!!!
Monday, October 31, 2016 by Agal

Science 7
a student made an electromagnet using a battery electrical tape and metal wire. she wanted to see what the effect would be if she switched the side of the battery she connected each end of the wire to. which of the following would be a correct conclusion
Monday, October 31, 2016 by cat

Science
Imagine Two Artificial Satellites Orbiting Earth At The Same Distance. One Satellite Has A Greater Mass Than The Other One? Which Of The Following Would Be True About Their Motion? A.The satellite with the greater mass is being pulled toward Earth w/ less of a force than the ...
Monday, October 31, 2016 by carolina del la cruz

science
A motorcyclist (with a total mass of 180kg) travels up a hill. When she starts at the bottom of the hill (altitude 32m) her velocity is 43km/h. At the top of the hill (altitude 365m) she has a speed of 115km/h. The hill is 12km long and during the journey she applies a braking...
Monday, October 31, 2016 by Ottilia

HELP WITH SCIENCE FAST
1.  Most likely, ___​_ were formed when l​ava from the moon's&n​bsp;interior flooded bowl­​like regions on the moon's surface​. (1 point) maria* ...
Monday, October 31, 2016 by help

science, organic chemistry
Determine the amount of compound remaining in the aqueous phase and organic phase and organic phase if a 5.0g organic compound is dissolved in 100 mL of water and is extracted with three 50-mL portion of ether (kb= 10). Compare this with one 150 ml portion with ether. Which is...
Monday, October 31, 2016 by Anonymous

Science
What is the difference between xylem and phloem?
Sunday, October 30, 2016 by Radiah

science
HOW MANY ATOMS OF OXYGEN ARE PRESENT IN 8.8G OF CARBON(IV)OXIDE
Sunday, October 30, 2016 by Vicky

Science
25cm3 of 0.1mol/dm3 Na2CO3 solution was titrated against 23.45cm3 of H2SO4 acid using phenolphthalein indicator. Calculate the concentration of the acid.
Sunday, October 30, 2016 by Zainab

Computer Science, Hardware
1.) If each stage is 1 clock cycle, calculate the number of clock cycles to execute a code stream of 10 instructions in a non-pipelined (i.e. sequential) fashion? 2.) Repeat part 1, assuming the instructions are executed in a pipelined fashion. Would this be the right formula...
Saturday, October 29, 2016 by Dio

Science
Cost is an example of _____ in designing a product. A. a constraint B. a solution C. a trade-off D. an idea is the answer A?
Saturday, October 29, 2016 by Anonymous

Science
Identifying the cause of any problems in a design is called _____. A. Patenting B. Brainstorming C. Prototyping D. Troubleshooting is the answer D?
Saturday, October 29, 2016 by Anonymous

Science
Identifying the cause of any problems in a design is called _____. A. Patenting B. Brainstorming C. Prototyping D. Troubleshooting is the answer D?
Saturday, October 29, 2016 by Anonymous

Science
Identifying the cause of any problems in a design is called____.
Saturday, October 29, 2016 by Anonymous

Science chemistry
Also. If you are given the conductivity of an unknown chemical, what the blue and red litmus paper change into when you check the chemical. And the pH level and solution type. How do you know the solution name and formula? I never learned how to find the solutions name of ...
Saturday, October 29, 2016 by Zubaida

Science chemistry
Also. If you are given the conductivity of an unknown chemical, what the blue and red litmus paper change into when you check the chemical. And the pH level and solution type. How do you know the solution name and formula? I never learned how to find the solutions name of ...
Saturday, October 29, 2016 by Zubaida

Science chemistry
Does hydrogen borate conduct electricity? We were told to search this up but I can't find it online and my class never did a lab on it.
Saturday, October 29, 2016 by Zubaida

Math
Prove that angle a is equal to angle E if angle D is equal to angle c Science I can't put the picture of the triangle I will try and explain it Two triangles that connect on one angle >< like this but a triangle and the angle in the middle ^ ( the angle that has the...
Saturday, October 29, 2016 by Ali

Science
Calculate the pH of a solution containing 2g of caustic soda per litre of water
Friday, October 28, 2016 by Deepali

True or False Please Help
(10 Environmental Science True or False Questions. Please correct me if I'm wrong.) 1. Domestic of animals and plants through history has enabled humankind to improve their lifestyle. (True) or False 2. Domestication is the process of selecting wild organisms for their ...
Friday, October 28, 2016 by GummyBears16

Science
Acrostic poem for L A N D F O R M S
Thursday, October 27, 2016 by txhnth

science
flow chart to find producr,average,sum,largest of three numbers?
Thursday, October 27, 2016 by vinay

science
The lowest possible energy position for an electron is known as the ground state. true or false
Thursday, October 27, 2016 by Anonymous

AP environmental science
To raise funds to meet its annual budget, a state government is debating whether to sell a large section of public forest to a logging company. Evaluate this plan in terms of two ecosystem services that the state might gain and two services the state might lose if the forest ...
Thursday, October 27, 2016 by help meeee :0

science
1.The trait for green eyes is dominant (Y) to brown eyes which are recessive (y). Determine the eye color a child will have with a Yy genotype: ☐Blue Eyes ☐ Green Eyes ☐ Hazel Eyes ☐ Brown Eyes 2. A bird that is heterozygous for the yellow feather trait...
Thursday, October 27, 2016 by ANSWERS PLEAAAAAASSSSSSSSEEEEEEEE

Computer Science
Write a program that Will prompt a user to enter his/her name and number.use a while loop that will display the user name times the entered number
Thursday, October 27, 2016 by Tom

Earth Science
20. Contrast point source pollution and nonpoint source pollution. Can someone help me please?!?!?! Asap please?!?!?!?!
Thursday, October 27, 2016 by Just a confused person...

science
Urea forms a ideal solution in water. Determine the vapour pressure in an aqua solution containing 10 percent bymass at 40degree Celsius
Wednesday, October 26, 2016 by priya

Science
A sky driver jumps out of a plane and as he fall he has acceleration of 9.8 m/s squared. How many seconds will it take to reach a speed of 28.5 m/s?
Wednesday, October 26, 2016 by Patricia

Science-physics
A bottle weighs 35g when empty,95g when filled with water and 119g when filled with an organic liquid. What is the capacity of the bottle: A-60cm cube B-84cm cube C-130cm cube D-154cm cube
Wednesday, October 26, 2016 by Matthew

Physical Science
A bullet is fired with an initial speed of 200 m/s. If a target is 500ft away, at what angle should the rifle be raised in order to hit the target?
Wednesday, October 26, 2016 by John

Science
What distance was used to define the astronomical unit (AU) A. the average distance across the sun, its diameter B. the average distance from the sun to mercury, the closest planet C. the average distance from the sun to earth, our home planet D. the average distance from the ...
Wednesday, October 26, 2016 by Brook

History of Technology
In developed countries, technological advances are most closely related to: A. cultural philosophy. B. warfare. C. applied science. D. theoretical science. Ans : D
Wednesday, October 26, 2016 by angela

science
An atom that has the same amount of atoms of each element on both sides of the reaction obeys what law? law of conservation of energy law of conservation of mass law of conservation of temperature law of conservation of atoms I know the Answer law of conservation of mass I ...
Wednesday, October 26, 2016 by Miracle Mckeller

science
the volume of 50gram of a substance is 20centimetercube if the density of water is 1gram/centicentimetercube will the object float or sink
Wednesday, October 26, 2016 by rahul sharma

Science HELP!!
Compare and contrast the roles of genetic factors and local conditions in determining physical traits Contrast dominant, recessive, codominant, and incomplete dominant traits and give examples of each Summarize the process of sexual reproduction and explain how variations of ...
Wednesday, October 26, 2016 by Callie

Science
If a female dog has her tail cut off in an accident. A few months later, she has eight puppies. How many puppies were probably born with tails?
Wednesday, October 26, 2016 by Callie

math and science for Young children
Lev vygotsky a contemporary of jean Piaget differed from Piaget in that
Wednesday, October 26, 2016 by gege

Science
What is the grouping of similar things
Tuesday, October 25, 2016 by Myonna

Science
Electrical energy can be converted to heat energy
Tuesday, October 25, 2016 by Judith

Science
Electrical energy can be converted to heat energy
Tuesday, October 25, 2016 by Judith

Science, Biology
How does DNA encode the characteristics of an organism?
Tuesday, October 25, 2016 by A.

Science Biology
Can you give me a example of Natural Selection?
Tuesday, October 25, 2016 by A.

Science
An automobile accelerates 1.24 m/s^2 over 6.00 s to reach freeway speed at the end of an entrance ramp. If the cars final speed is 86.0 km/h, what was its initial speed when it began accelerating? Express your answer in km/h I can do it but I just don't know how I'm ...
Tuesday, October 25, 2016 by John

science
Potassium-40 has a half life of 1.2 billion years and decays into the stable daughter isotope Argon-40. If you find a rock that contains 20 Potassium-40 atoms and 60 Argon-40 atoms, how old is the rock?
Tuesday, October 25, 2016 by lex

Science: The Similarities
Can U Help Me State at Least 3 Similarities Of Fold Mountains and Fault Mountains? THX!!!!!!!
Tuesday, October 25, 2016 by Agal

Science
The force of gravity acting on a car driving on the surface of a planet is called Mass Terminal velocity Weight*** Free fall
Tuesday, October 25, 2016 by Felicia Graves

Science/Physics
The speed of light in a certain medium is 61.2% of the speed of light in vacuum. What is the index of refraction of the medium?
Tuesday, October 25, 2016 by Maykayla

Science
I NEED TO FIND AT LEAST 3 FACTS ABOUT FAULT MOUNTAINS!!!!! HELP!!!!!
Tuesday, October 25, 2016 by Agal

History Check Please!
Please check! Thanks! 1. How did the development of universities in medieval Europe strengthen the Church and unify society? a. Universities grew up around cathedrals, and courses of study helped educate clergy.*** b. Universities started cathedrals, which were important ...
Tuesday, October 25, 2016 by Olivia N J

Science
How do the processes for identifying rocks and minerals compare? Describe at least one similarity and one difference between them.
Monday, October 24, 2016 by Just a confused person...

Science (Chemistry) (Yield)
Using your mass of Mg (0.101g), and assuming all of the Mg burns in oxygen and forms the theoretical predicted product, calculate the theoretical yield of magnesium oxide. I wrote out the equation and it turned out to be: 2Mg+O2->2MgO I have my mass of Mg but how do I get ...
Monday, October 24, 2016 by Ray

maht science
One litter of orange juice is poured equally into 8 glasses. How many milliliter does one glass hold?
Monday, October 24, 2016 by jiskha

Science Biology
What does it mean to say that mutations are random?
Monday, October 24, 2016 by A.

Science
Your moms vacumm cleaner really sucks up dirt. The motor draws a current of 6 A at a potential of 120 V. Calculate the power and resistance of her vacuum cleaner
Monday, October 24, 2016 by Yasmine

science
You normally drive the south expressway between Calubang and Magallanes at an average velocity of 105km/hr (65mi/hr), and the trip takes 2 hours and 20 minutes. On a Monday morning, however, heavy traffic slows you down and you drive the same distance at an average velocity of...
Monday, October 24, 2016 by Johnny

Science
How much heat is released when 75.0 g of steam at 100.0 c is cooled to ice at -15.0c? I'm using 6.01 kl/mol for fusion of water, 75.4 j/mol-c for heat capacity of water and 36.4 j/mol- c for molar heat capacity of ice.
Monday, October 24, 2016 by Kurt

science
The first ionization energy of Boron is 799, give an equation illustrating first ionization with Boron
Sunday, October 23, 2016 by Alexandrina

Science
How long would it take Kara to drive 324 miles at an average speed of 57 mi/hr? d=324 km s=57 mi/hr t=? What equation do I use for this question?
Sunday, October 23, 2016 by Unknown

Science
In an experiment ti determine the density of a liquid the following pieces of information were obtained. Mass of empty bottle=50g Mass of bottle and liquid=85g Volume of liquid=100cm^3 Use the information to determine the density of the liquid
Sunday, October 23, 2016 by Patrick

science
How do you prepare 1000ml of 0.1M from solid NaOH from NaOH pellets?
Sunday, October 23, 2016 by Peterh

Science
Total distance 25 km Total time taken 20 minutes What is average speed
Sunday, October 23, 2016 by Aakansha

science
assuming the earth to be a sphere of uniform density,what will be the value of g in a mine 100th below the earth surface.Given r=6400 km and g=10m/s.
Sunday, October 23, 2016 by Aditya

Science
suppose a skydiver (mass = 75 kg) is falling toward the earth. when the skydiver is 100 m above the earth he is moving at 60 m/s. at this point calculate the skydiver's
Saturday, October 22, 2016 by Michelle

Science
an object of mass 2 kg is dropped from a certain height.On rebounding from the ground,it rises vertically till 2/5th of its initial height.what will be the ratio of magnitude of momentum of the object just before and after striking the ground?
Saturday, October 22, 2016 by Anonymous

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