Monday
September 26, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

Physical Science
You drop a water balloon off of a tree branch, and you time the drop time at Δt = 0.8 sec, from the instant you drop it to the instant it impacts the sidewalk. What is the height of the tree branch?
Monday, September 5, 2016 by Courtney

Science PLEASE HELP
what functions do individual cells perform that are similar to the functions of our bodies?
Monday, September 5, 2016 by Joud

science
what functions do individual cells perform that are similar to the functions of our bodies?
Monday, September 5, 2016 by Joud

Science
Calculate the energy release in 1 gram of Uranium 235
Monday, September 5, 2016 by ADA

Science
An arrow is shot vertically upwards with an initial velocity of 14 m/s . Calculate the height reached
Monday, September 5, 2016 by Nadia

Science
500g of water at 100°c is mixed with 300g of water at 20°c.specific heat capacity of water is 4.2Jg°c.find the final temperature of mixture. (Physics)
Monday, September 5, 2016 by Rahul

Science Earth
Guard cells are closed during the night. This means that no gases can come in or out of the stomata. Why would the plant not need to take in gas during the night? How can I answer in this question?
Sunday, September 4, 2016 by CC

English
How would you handle the following situations? In your answers, refer to specific skills that you might use, and include words that you might say. Remember that a chairperson is a polite and tactful communicator. a. Your social studies group is supposed to be discussing the ...
Sunday, September 4, 2016 by Tala

Computer science
What is the count for the instruction CountMe as a function of n for the fragment below? Line 1: j = 1 Line 2: while (j<= n/2) { Line 3: i = 1 Line 4: while (i<=j) { Line 5: CountMe Line 6: i++ Line 7: } Line 8: j++ Line 9: }
Sunday, September 4, 2016 by Vaibhav

Computer science
What is the count for the instruction CountMe as a function of n for the fragment below? (Assume that 2k-1 ≤ n < 2k). Line 1: j = 1 Line 2: while (j<= n) { Line 3: CountMe Line 4: j = 2*j;
Sunday, September 4, 2016 by Vaibhav

Computer science
What is the count for the instruction CountMe as a function of n for the fragment below? (Assume that n can be either even (2k) or odd (2k+1)) Line 1: j = 0 Line 2: while (j < n) { Line 3: CountMe Line 4: j = j+2; }
Sunday, September 4, 2016 by Vaibhav

Computer science
What is the smallest value of n such that an algorithm whose running time is (2^15)n runs faster than an algorithm whose running time is 2^n on the same machine?
Sunday, September 4, 2016 by Vaibhav

computer science
write a fortran program to read in the scores of 120 students using an array
Sunday, September 4, 2016 by wizzylion

science
For the reaction 2N2O(g) ⇌ O2(g) + 2N2(g), what happens to the equilibrium position if the volume decreases? A. does nothing B. shifts to the left C. doubles D. shifts to the right
Sunday, September 4, 2016 by Ben

Science
A 1.37molal of H2SO4 has a density of 1.22g/mL.Determine the Concentration in Normality
Sunday, September 4, 2016 by Harrel

computer science
write a fortran program to read in the scores of 120 students in a class using an array
Sunday, September 4, 2016 by wizzy

science
Prove that the maximum horizontal range is 4times the max height attaind by projectile when fired at an inclined so as to have max. Horizontal range
Saturday, September 3, 2016 by sankalp

Science
MMR causes autism Help with the connection between MMR vaccine to autism pros and cons
Saturday, September 3, 2016 by Sam

science
Carbon+argon= + =
Friday, September 2, 2016 by mar

science ( physics )
Two cars A and B are seprated by a distance of 0.5 km and moving in the same direction with same speed. A car C moving with 10 km/h in opposite direction meets these cars at an interval of 1 minute. The speed of A and B is
Friday, September 2, 2016 by Shivam karn

Science
A snooker ball X of mass 0.3kg moving at 5m/s hit a stationary ball Y of mass 0.4kg and Y move at a velocity of 2m/s at angle to the initial direction of X. Find the velocity and direction of X after hitting
Friday, September 2, 2016 by MARTIN

Science help immediately
You are exercising on a hot day. Your body temperature goes up. You begin to sweat. The sweat cools your body. Sweating is an example of: A. Input. B. Process. C. Output. This D. Feedback. or this?
Friday, September 2, 2016 by Stacie

integrated science
A planet is 2.45 x 10^9 km away. How long would it take in hours to travel to the planet at the speed of light? (speed of light is 2.998 x 10^8 m/s)
Thursday, September 1, 2016 by David

science help pls pls
The table below shows the average distances of Jupiter and Earth from the sun. Name of Planet Average distance from the sun (in AU) Jupiter 5.2 Earth 1.0 What is the difference between the orbital periods of Jupiter and Earth? 4.20 years 6.20 years 8.86 years 10.86 years 12.40...
Thursday, September 1, 2016 by Oscar

biology
which of the following is consistent with the theory of vitalism ? A.all matter contains a vital force** b.the chemistry of life and nonlife are similar c. living things contain a vital force absent in nonliving things d. life must be sustsained through a series of chemical ...
Thursday, September 1, 2016 by 9th grader

science
A(n) ____________ is a legal document issued by a government that gives an inventor exclusive rights to make, use, or sell an invention for a limited time.
Thursday, September 1, 2016 by U dont know me

biochemistry
which of the following is consistent with the theory of vitalism ? A.all matter contains a vital force** b.the chemistry of life and nonlife are similar c. living things contain a vital force absent in nonliving things d. life must be sustsained through a series of chemical ...
Thursday, September 1, 2016 by 9th grader

science
25. Perform the following conversions. (Do your work on scratch paper and then type answer.) A. 105 m = cm B. 2000 mL = L C. 3400 g = kg D. 0.985 km = m E. 2345 mm = m F. 34 kg = g
Thursday, September 1, 2016 by katie

science
A/MX-----AX/M and AX is green coloured solution.then A and MX RESPECTIVELY ARE
Thursday, September 1, 2016 by Anshul

Science
Which of the following questions is outside the scope of science? a. how are religion and philosophy different b.what is the diet of an american alligator c. how do humans digest protein d. how does gravity affect an airplane's motion
Thursday, September 1, 2016 by Steven

science
how were you able to determine the branches of science that are connected to tha issues that the filipinos are facing right now?
Thursday, September 1, 2016 by Aeron michael

Science
Q1: Why do scientist use models? A.) Scientist use models to learn about things that are too small, too late, or too complex to observe directly. B.) Scientist use models because doing so is always part of the scientific method. C.) Scientist use models because they always ...
Thursday, September 1, 2016 by Help please

8th Grade Science
Why do scientist use standered units of measurements? A.) Because their tools only measure in units B.) Because their units are either too small or too large to work with C.) So they can communicate findings without confusion D.) So that people who are not scientists can ...
Thursday, September 1, 2016 by ItsMe!

science
what functions do individual cells perform that are similar to the functions of our bodies?
Wednesday, August 31, 2016 by Joud

Science
what are some barriers to solve the zika virus problem? What are some possible solutions for zika virus problem? According to the off the podium article about zika virus. tnx a lot .
Wednesday, August 31, 2016 by Dj

Science
Give an example of population.
Wednesday, August 31, 2016 by John Dosley

science
Equations to show how the ff form complexes A. Fe^2+ and H2O B. Cr^3+ and NH3 C. Fe^3+ and CN^-
Wednesday, August 31, 2016 by Fofie

math
mr sato will give each pair of students 3 magnets. So far Mr sato has given 9 pairs of students their 3 magnets..How many more magnets does Mr Sato need so that each pair of students has exactly 3 magnets.There are 24 students in a science class.
Wednesday, August 31, 2016 by Anonymous

Science
Can someone explain to me, what exactly scientific principles are?
Wednesday, August 31, 2016 by Sammy

Science
A student measures the mass of a paper clip. The student’s data table is shown below. The accepted value for the paper clip’s mass is 1.14 g. Trial 1 - 2.45 g Trial 2 - 2.40 g Trial 3 - 2.42 g Which of the following describes the student’s measurements? a. The ...
Wednesday, August 31, 2016 by Scarlet

Science
Is the inventory of time machine related to black hole
Wednesday, August 31, 2016 by Ronson

Science
A student measures a room to be 20.0m*17.16m. Which of the numbers below represents the room's area with the correct number of significant figures? A) 340 meters squared B) 343 meters squared*** C) 343.2 meters squared D) 343.20 meters squared Am I correct? Not sure if it...
Wednesday, August 31, 2016 by Scarlet

science
Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life
Wednesday, August 31, 2016 by ttng

science
I believe that our solar system formed by the same process as star formation. A huge cloud of dust and gas collapsed and condensed. Gravity pulled matter into the center core, nuclear fusion began, and our Sun was created. Remaining matter and gas clumped together to form the ...
Wednesday, August 31, 2016 by javier

Science
a body of mass 500g moving at 5m/s comes to rest after covering a distance of 5m.find the retarding force acting on it.
Wednesday, August 31, 2016 by Sanjaytharan

SCIENCE
A student measures a rectangular room to be 20.0 m * 17.16 m. Which of the following numbers represents the room's area with the correct number of significant figures? 340 m^2 343 m^2 343.2 m^2 343.20 m^2
Wednesday, August 31, 2016 by Giovanni

Math
Several students were surveyed about their favorite class. 26 students chose art 19 English 21 math 16 music 32 science. What fraction of the of the students chose music as their favorite subject.
Wednesday, August 31, 2016 by Anonymous

Math
Several students were surveyed about their favorite class. 26 students chose art 19 English 21 math 16 music 32 science. What fraction of the of the students chose music as their favorite subject.
Wednesday, August 31, 2016 by Anonymous

SCIENCE NOW
an experiment was conducted to test which of two antibiotics was more effective at killing a certain type if bacterium cultures a and b were treated with antibiotic 1; cultures c and d were treated with antibiotic 2; culture e was not treated with antibiotic. based on the ...
Tuesday, August 30, 2016 by coolguy123

SCIENCE
state at least one possible source of bias in an expirament and describe how you can reduce it.
Tuesday, August 30, 2016 by coolguy123

SCIENCE NOW
state at least one possible source of bias in an expirament and describe how you can reduce it. plz help
Tuesday, August 30, 2016 by coolguy123

science
things people must have to survive
Tuesday, August 30, 2016 by Hugo

science
A concave lens or focal lens 10cm produce an erect image 40cm from the lens .Determine the object distance and magnification.
Tuesday, August 30, 2016 by samuel

Science
Which of the following identifies a measurement, its SI units, and the tool most commonly used to measure it? a. length, meter, ruler *** b. temperature, degrees Fahrenheit, thermometer c. weight, gram, scale d. volume, millimeter, meniscus Why do scientists use standard units...
Tuesday, August 30, 2016 by Chloe, please look at my answers!

Science
Which of the following identifies a measurement, its SI units, and the tool most commonly used to measure it? a. length, meter, ruler *** b. temperature, degrees Fahrenheit, thermometer c. weight, gram, scale d. volume, millimeter, meniscus Why do scientists use standard units...
Tuesday, August 30, 2016 by Help me, from Chloe

Science
A gas has an initial volume of 2.5 L at a temperature of 275 K and a pressure of 2.1 atm. The pressure of the gas increases to 2.7 atm, and the temperature of the gas increases to 298 K. The final volume of the gas, rounded to the nearest tenth, is
Tuesday, August 30, 2016 by Egle

Science, chemistry
During the experiment, 100ml will be required to prepare 0.5M solution of NaNO3. Calculate the mass of NaNO3 in grams that will be required.
Tuesday, August 30, 2016 by Hilen

Science
A student measures the mass of a paper clip. The student’s data table is shown below. The accepted value for the paper clip’s mass is 1.14 g. Trial 1, 2.45 g Trial 2, 2.40 g Trial 3, 2.42 g Which of the following describes the student’s measurements? a. The ...
Monday, August 29, 2016 by WonderWomen

science
When enough experimental data support a hypothesis, the hypothesis then becomes a fact theory inference conclusion I am torn between theory and conclusion
Monday, August 29, 2016 by kelley

science
. How does changing volume change the density of an object?
Monday, August 29, 2016 by Aubrey T.

life science
state the aim of this investigation
Monday, August 29, 2016 by zandi

science
a body of mass 2kg is suspended by a rope and is pulled to aside by a means of horizontal force ,so that the rope makes an angle 45 degrees with the vertical the horizo ntal force is
Monday, August 29, 2016 by guru sainath

Science
Do the shoes help the basketball players , run across the court ?
Monday, August 29, 2016 by Jasmine

science
do fruits and vegetables contain bases
Monday, August 29, 2016 by Anonymous

Science
A stone is dropped from 78.5 m ,after 1 sec,another stone is dropped,both reach the ground at the same time, calculate the speed of second ball.
Monday, August 29, 2016 by Sowmya

science
Ryan wants to identify an element. Which piece of information would best help Ryan identify the element?
Sunday, August 28, 2016 by Claire

Science
Imagine you designed an experiment that investigated the effect of feeding yeast cells different concentrations (0, 5, 10, 15, 25%) of sugar solutions. The yeast used the sugar to do cellular respiration and make CO2 as a waste product. The volume of CO2 released was captured ...
Sunday, August 28, 2016 by CC

Math science
If the numbers never end is zero the end number?
Sunday, August 28, 2016 by Jan

Science
Find linear momentum when a stone of mass 50kg is thrown from a height 10m
Sunday, August 28, 2016 by Shambhavi

Science
Force 4n,3n and 12n act at a in point mutually perpendicular directions .The magnitude of resultant force is
Saturday, August 27, 2016 by Rakesh

science
1. Which of the following is a good study habit? (1 point) 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
Friday, August 26, 2016 by help me fam

science
Molecular formula of silica is?
Friday, August 26, 2016 by bili

Science
Giant kelp has gas-filled sacs to help it float so it can do what
Friday, August 26, 2016 by Cameron

science
Molecular formula of silica is?
Friday, August 26, 2016 by bili

Science
The efficiency of a machine is 80%.calculate,the amount of energy needed by the machine to do work of 150joules.
Thursday, August 25, 2016 by Emmanuel

science
What information does an equilibrium constant give about a reaction? A. It tells how long it takes the reaction to reach equilibrium. B. It tells how much energy is required for the reaction to happen. C. It tells what the rate constant of the reaction is at equilibrium. D. It...
Thursday, August 25, 2016 by evelyn

science
Which rate constant would result in the fastest reaction? A. 1.3 × 103 L/mol · s B. 2.8 L/mol · s C. 9.5 × 10-2 L/mol · s D. 4.2 × 10-3 L/mol · s is the answer for this one c?
Thursday, August 25, 2016 by evelyn

science
A graph of experimental data is a straight line when ln[H2] is plotted versus time. Which rate law fits the data? A. Rate = k(ln[H'small2']) B. Rate = k/[H'small2'] C. Rate = k[H'small'2] D. Rate = k[H'small'2]^2
Thursday, August 25, 2016 by evelyn

science
If a reaction rate increases with temperature, how will the rate constant of the reaction change with temperature? A. The rate constant only changes upon addition of a catalyst to the reaction. B. The rate constant will decrease with temperature. C. The rate constant will not ...
Thursday, August 25, 2016 by evelyn

Science
Suppose u walk across the room of length 9 m with the velocity of 1.5m perhr. Calculate the velocity in m/s and the time taken to move across the room
Thursday, August 25, 2016 by Vidhi

Science
How many millilitres of water must be added to 30 mL of 10 M of HNO3, so that the solution concentration is reduced to 0.2 M?
Wednesday, August 24, 2016 by Tumpale

Science
A racecar driver steps on the gas, and his car travels 16 meters in 2 seconds, starting from rest. What is the average velocity in m/s and km/h?
Wednesday, August 24, 2016 by Anonymous

SCIENCE
When a student added Zinc granules to dilute HCI, a colorless and odorless gas was evolved, which was tested with a burning match stick, it was observed that: (a) The match stick continued to burn brilliantly. (b) The match stick burnt slowly with a blue flame. (c) The match ...
Wednesday, August 24, 2016 by A GOODSTUDENT

science
a bkock placed on a rough inclined plane of length 4m just begins to slide down when the upper end of the plane is 1m high from the ground.calculate the coefficient of static friction.
Wednesday, August 24, 2016 by Agam

science
what type of magma flows very fast
Wednesday, August 24, 2016 by emem

Science
A race car driver steps on the gas, and his car travels 16 meters in 2 seconds, starting from rest. What is the average velocity in m/s and in km/h?
Wednesday, August 24, 2016 by Kader

science
While exploring a cave, a spelunker starts at the entrance and moves the following distances. She goes 75.0 m north, 250 m east, 109 m at an angle θ = 30.0° north of east, and 156 m south. Find the resultant displacement from the cave entrance. The figure below ...
Tuesday, August 23, 2016 by john

Science
Bart believes that mice exposed to microwaves will become extra strong (maybe he's reading too much Radioactive Man). He decides to perform this experiment by placing 10 mice in a microwave for 10 seconds. He composed these 10 mice to another 10 mice that had not been ...
Tuesday, August 23, 2016 by Mika

science
1. Liquid phosphorus trichloride, PCl3 is made by the direct combination of phosphorus and chlorine. a. What is the maximum mass of PCl3 that can be produced from 125 g of P4 and 323 g Cl2? b. What mass of P4 remains after the reaction?
Tuesday, August 23, 2016 by wesley

Physical science check my answers
5. Steve's older brother got this cool new car. He said it can go from a stopped position to 80 miles per hour in ten seconds. His brother is describing the car's A. acceleration. *** B. average velocity. C. instantaneous speed. D. average speed. 6. Radar devices are ...
Tuesday, August 23, 2016 by Summer Moriarty

Physical science check my answers
2. On my bike, I was able to travel 40 miles in one hour. From this information, we can determine the bike's A. speed. *** B. velocity. C. acceleration. D. direction. 3. The local news team is tracking the storm and has reported that it is traveling north, northwest at 20 ...
Tuesday, August 23, 2016 by Summer Moriarty

science
Does hydrogen undergoes reduction or oxidation on the basis of oxidation number in 2NH3 +H2SO4 which gives (NH4)SO4
Tuesday, August 23, 2016 by reet

science
The half-life of carbon-14 is 5730 years. If we start with 10 grams of carbon-14, after 5730 years, we will have _____ of carbon-14 left.
Tuesday, August 23, 2016 by leon

science
What is the oxidation number of Si in (CH3)2SiCl2
Tuesday, August 23, 2016 by reet

science
2. How many grams of 96.5% pure NaOH pellets do you need to make 1.000 liter of 1.50 N NaOH?
Monday, August 22, 2016 by h

science
how to balance chemical equations with redox reaction Cr(OH)3 + IO3{-} + OH{-} = CrO4{-2} + I{-}
Monday, August 22, 2016 by debayan

science
what is the action of chlorine gas on ethane
Monday, August 22, 2016 by vishwajit

Science - Please Look!
The senses are used to make which of the following? inferences predictions evaluations ((**observations**)) You walk into the kitchen and see a broken egg on the floor. Which of the following is an inference you can make based on this observation? ((**The egg rolled off the ...
Monday, August 22, 2016 by Kat

Science
A transvers wave traveling on a rope is given by y=0.25 sin(0.3 radX-40radt), where y and X is expressed in meter and t is in seconds. Determine a-Amplitude. B-frequency C-Direction of motion. e-Displacement at X=0.6 m and t=2.3 s. Please help me
Monday, August 22, 2016 by Shehab

SCIENCE
A farmer believes that fertilizer runoff from a farm is killing the fish in a nearby pond. The farmer measures the amount of fertilizer in the pond each week and counts the number of dead fish. The measurements indicate that, as the fertilizer concentration increases, the ...
Monday, August 22, 2016 by HAYDEN

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