Thursday
July 28, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

Science
Calculate the no. Off molecules atom in 360gm of water...??
Thursday, June 30, 2016 by Anonymous

science
A parachutist jumps from height 100m. He wants to reach at ground with zero velocity. For this purpose he switches on a parachute propeller after falling freely for certain height. Given that the parachute propeller is switched on total acceleration of the man varies with ...
Thursday, June 30, 2016 by ABC

science
A parachutist jumps from height 100m. He wants to reach at ground with zero velocity. For this purpose he switches on a parachute propeller after falling freely for certain height. Given that the parachute propeller is switched on total acceleration of the man varies with ...
Thursday, June 30, 2016 by Himanshu

science
AgNO3+NaCL=AgCL+NaNO3 is not a redox reaction but Cu+2AgNO3=2Ag+Cu(NO3)2 is a redox reaction.explain
Thursday, June 30, 2016 by mohit

science
which path does light take upon entering your eye? a). cornea-pupil-iris-retina-lens-optic nerve-brain b). pupil-cornea-iris-lens-retina-optic nerve-brain c). cornea-pupil-lens-retina-optic nerve-brain
Thursday, June 30, 2016 by aya corneto

science
Here are some examples of molecules: Cl2, CO2, SO2, and CF4. Each of these is related in that they're all bonded covalently. Which of these is a covalently-bonded molecule also? A. He atoms B. K2S C. BaBr2 D. P2O4
Wednesday, June 29, 2016 by will

science
How Do the Earth's Four Subsystems Work Together?
Wednesday, June 29, 2016 by LESTER

science
how our heart work?
Tuesday, June 28, 2016 by abdul rafe

Science
Description of each transition or step of the cycle Here are a list of the steps to include: a. EXTRACTION b. COMBUSTION c. RESPIRATION d. PHOTOSYNTHESIS e. DIFFUSION f. DECOMPOSITION g. SEDIMENTATION Persuasive explanation of why the carbon cycle is so important to our planet.
Tuesday, June 28, 2016 by Pickle

science
number of grams of MgCl2 needed to prepare a 250ml of a 12% aqueous solution with 1.1g/ml density
Tuesday, June 28, 2016 by keith

science
1.5173 g of organic iron compound containing FE , C ,H and O is burnt in oxygen gas produced 2.838 g OF carbon dioxide and 0.8122 g of water. In separate experiment to determine the mass % of iron, 0.3355 g of the compound yielded 0.0758 g iron (II) oxide. Determine the ...
Tuesday, June 28, 2016 by Nor

Social science
Write a diary entry relieving your days glory as Napoleon in exile at st.helena
Tuesday, June 28, 2016 by Manu

science
How our heart work?
Tuesday, June 28, 2016 by Abdul.Rafe

science
How our heart work?
Tuesday, June 28, 2016 by Anonymous

science
the tension ratio between the tight and slack side is 4,2:1. the force in the slack side of the belt is 500N. the diameter of the driving pulley is 350mm. the rotational frequency of the driving pulley is 550r/min
Tuesday, June 28, 2016 by Liezel

science
A bullet is moving with speed of 500m/s. Hit the target and penetrate 100mm into the target. Find the retardation of the bullet.
Tuesday, June 28, 2016 by nicki

yogi science
HOW are all living things alike ?
Monday, June 27, 2016 by Anonymous

Science
What is the amount of oxygen needed to create output 20gm?
Monday, June 27, 2016 by LABIBUL HASAN

science
Find the acceleration of a lift moving upwards with 2m/s acceleration, 20kg on the it & 1000N force
Sunday, June 26, 2016 by prathibha

Science
Calculate the volume of solute percent in 90ml solution with 5%
Sunday, June 26, 2016 by Althea Jane Duran

Math
English Foreign Languages Health Home Economics Math Music Physical Education Science Social Studies GRADE LEVELS Preschool Kindergarten Elementary School 1st Grade 2nd Grade 3rd Grade 4th Grade 5th Grade 6th Grade 7th Grade 8th Grade High School 9th Grade 10th Grade 11th ...
Saturday, June 25, 2016 by Aaron

science
A block of wood is weighed on a beam balance.its mass is 54g.The density of the block is1.8g/cm`3.Find volume
Saturday, June 25, 2016 by emmanuel

science
A measuring cylinder contains 50cm`3 of water.A stone has a mass of 1.75g.The stone is lowered into the cylinder, the level of the water rises to 52.5cm`3.Calculate the density of the stone
Saturday, June 25, 2016 by emmanuel

science
How much below the surface of the earth does the acceleration due to gravity become 1percent of its value at the earth surface? The earth is assume to be a sphere of radius 6.4×10^6m.
Saturday, June 25, 2016 by Ioba Bolwary Marak

Science
What kind of a solution will you create if you add 17g of table salt to 50g of wAter at o'c?
Saturday, June 25, 2016 by John mark Lomboy

Science-chemistry
an alloy of metal A and B in the eatio of 2:5 and weighs 36g the percentage of metal A is 22.22% if atomic mass of A is 40 then atomic mass of metal B is
Friday, June 24, 2016 by Sukrit

science
Linear momentum of ball mass 50kg is
Friday, June 24, 2016 by gauri arya

science
Linear momentum of ball mass 50kg is0.5kgms-1find Velocity
Friday, June 24, 2016 by gauri arya

Science
Compute the wavelength of an X-ray with a frequency of 6.0 1018 Hz.
Friday, June 24, 2016 by Karissa

Science
Find the megnitude of 2 forces.such that if they act at triangular,there is resultant √10N . If act at 60° the resultant is √13N ?
Friday, June 24, 2016 by Jerin joz

engineering science
a lifting machine is used to lift a load up to a height of 800mm when an effort moves through a distance of 4 m
Thursday, June 23, 2016 by zikhona

engineering science
A horizontal force of 230B is required to pull a trolley 39 m, at a constant speed across a horizontal surface in 40 sec.1 the work done 2. The speed of the trolley. 3. Power required
Thursday, June 23, 2016 by busy nhlapo

Science
How long does it take the moon to go from full-moon phase to new moon phase? one week two week ~ (MY ANSWER) three week four week
Wednesday, June 22, 2016 by Jimmy

Science
Use water to represent coastal areas and dirt to represent inland areas. How does the changing temperature differ for the different areas? What does this say about the temperature range for each location? What does that say about the climate? What does this question means?
Wednesday, June 22, 2016 by Nikki

science
write word equations and balanced chemical equations for each of the following reactions: a)calcium bicarbonate reacts with hydrochloric acid. b)magnesium hydroxide reacts with hydrochloric acid. c)Aluminum hydroxide reacts with hydrochloric acid.
Wednesday, June 22, 2016 by Adivhaho

Earth science
the land will heat up the most because _____ ???
Wednesday, June 22, 2016 by Nikki

Earth science
How do the heating of land and water compare?
Wednesday, June 22, 2016 by Nikki

Science
The reaction between sulphuric acid and iron (III) hydroxide [Fe(OH)3] gives
Wednesday, June 22, 2016 by Vanshika

English
The question for my essay was to agree or disagree with: Some critics argue that you can only fully understand a piece of literature if you understand the historical events that were on going when it was being written. Others argue that each piece of literature is independent ...
Wednesday, June 22, 2016 by Justine

science
what could be a good title for : if u r making a booklet were u have to make a spaceship.and writing about how to prevent heat loss in your spaceship
Wednesday, June 22, 2016 by alia

science
explain to to transfer heat from a electric stove?
Wednesday, June 22, 2016 by Aisha

Science
6.02 molecules of urea are present in100 ml of its solution . The concentration of urea solution is
Wednesday, June 22, 2016 by Mandeep

Physical Science
Many people mistakenly believe that the astronauts who orbit Earth are "above gravity." Earth's mass is 6×1024kg, and its radius is 6.38×106m (6380 km). Use the inverse-square law to find a height above Earth's surface at that the force of gravity...
Tuesday, June 21, 2016 by Hannah

Physical Science
A penny on its side moving at speed v slides off the horizontal surface of a table a vertical distance y from the floor. If the speed is 3.1 m/s and the coffee table is 0.30 m tall, find the distance the coin lands from the base of the table. (Use g=9.8m/s2.).
Tuesday, June 21, 2016 by Hannah

Physical Science
Using the formula for gravity, find the force of gravity on a 0.80-kg mass at Earth's surface. (The mass of Earth is 6×10^24kg, and its radius is 6.4×10^6m.).
Tuesday, June 21, 2016 by Hannah

science
Between a 700kg elephant moving at a velocity of 18km/h East and a 74kg cheeetah moving at 31m/s East. Which is more difficult to stop? Why?
Tuesday, June 21, 2016 by Chl÷e

science
All of the following factors are related to the plate tectonic model of the western coast of South America except the 1) length of the coastline 2) pattern of the earthquake activity 3) location of volcanoes 4) density of crustal plates 5) location of mountain ranges
Tuesday, June 21, 2016 by nathalia

science
The occurrence of earthquakes along plate boundaries indicates that the 1) plates are stationary 2) earth will eventually break apart 3) earth is shrinking 4) coast of California will break off and slide into the ocean 5) plates are moving
Tuesday, June 21, 2016 by Anonymous

Science
Write the word equation to show the chemical reaction taking place during acid rain?
Tuesday, June 21, 2016 by Raghav

science
out of following solution which possesses lowest osmotic pressure,highest boiling point and highest frezzing point 1M KCl,1MNa3PO4 and 1M glucose.
Tuesday, June 21, 2016 by sunidhi

science
is the blob fish going extinct or is it still common? and does it have any Limiting Factors?
Monday, June 20, 2016 by Frisk

science
if the force is increased to 60n for the same box what will be the acceleration?
Monday, June 20, 2016 by skusta

science
suppose a box is 2kg is push with a force of 40n what is acceleration?
Monday, June 20, 2016 by skusta

Science chemistry
Which compound has the melting point of -23 degree Celsius and boiling point of 77 degree Celsius ? Thx....
Monday, June 20, 2016 by Tan

Physical Science
The A note has a frequency of 880 Hz. What is the wavelength if the speed of sound is 343 m/s? 0.39 m 2.57 m 537 m 301,000 m Which speed(s) is/are below the sound barrier in air? A. 257 m/s B. 1,030 m/s C. 10 m/s
Sunday, June 19, 2016 by Anonymous

Physical Science Please Check Answers?
I have difficulties understanding physical science and I'd really appreciate it if someone would check over the answers of my practice quiz. I have a test coming up and I really don't want to fail it. I marked my answers with a ******. Thank you in advance! 1. A ...
Sunday, June 19, 2016 by Anya

Science
An Insect is magnified 12 times by a concave mirror. If the image is real, inverted and 6 cm away from the mirror, how far away is the insect? I need help in steps, when I tried the question I got a wrong answer
Sunday, June 19, 2016 by Holfbrincl

Physical Science 8th Grade
1. What is the resulting direction of a surface wave? Is it perpendicular, parallel, opposite, or circular? 2. What happens when a mechanical wave travels through a medium? What is transferred - mass, particles, energy, or waves? 3. Which of these waves cannot travel in a ...
Sunday, June 19, 2016 by Abby427

science
According to the Lewis Acid/Base theory, what is the neutralization equation of Acid Nacl and Base AlCl3? NaCl+AlCl3----> (NaCl+AlCl3-----> Na+AlCl4 is incorrect)
Sunday, June 19, 2016 by Tina

science
a bullet of mass 20g is horizontally fired with a velocity of mass 150m/sec from a pistol of mass 20g.what is the recoil velocity of the pistol?
Sunday, June 19, 2016 by ani

Math 5
A test in science is scored in the ff. way. Each correct response score 5 points while each wrong response scores 2 points. Ryan got 15 correct answers out of 20 item test. What was his score????❓❔
Saturday, June 18, 2016 by Koala

Science
According to the Lewis Acid/Base theory, what is the neutralization equation of Acid Nacl and Base AlCl3? NaCl+AlCl3----> (NaCl+AlCl3-----> Na+AlCl4 is incorrect)
Saturday, June 18, 2016 by Tina

computer science
QUESTION 1 When using the OR logical operator to connect 2 conditions to create a complex Boolean expression, neither the first condition nor the second condition has to be true for the complex Boolean expression to be true. True False QUESTION 2 String comparisons are ...
Saturday, June 18, 2016 by Tom

science
a particle is projected vertically upward from ground with velocity 10 m/s. Find which time particle reaches highest point?
Saturday, June 18, 2016 by Anonymous

science
Two charges placed at a distance r apart exert force F on each other at what distance will these charges experience same force in medium of dielectric constant K.
Saturday, June 18, 2016 by Priya

Science
Calculate average velocity of a minute hand of 5cm long from between 6am to 6:30am
Saturday, June 18, 2016 by Dinesh

Computer Science
I haven't done this before and I need some help starting this: A programmer is writing a total ticket price calculator for a theme park. The park offers the price of £13 per adults and £8 per child. There is a bulk purchase discount of 10% off the total price ...
Saturday, June 18, 2016 by Hollie

Science physics
The least count of a screw gauge is 0.001cm the diameter of a wire measured by it is 0.225cm. Find out the percentage error in this measurement
Saturday, June 18, 2016 by Kanika

Science
750 ml of nitrogen are collected over water at 25•c and 740mm pressure of the aqueous tension at this temperatures is 23.8 mm hg. calculate the mass of dry gas
Saturday, June 18, 2016 by Kanika

Science
A body is thrown vertically upwards with a velocity of 98m/s. If g=a=9.8 m/s when will it reach its highest point
Saturday, June 18, 2016 by Deepika

Math science everything
I need help! I have been trying to poop for an hour and nothing is coming out. It really hurts and smells really bad! Please Help!!
Friday, June 17, 2016 by HELP PLEASE

physical science
An 85.0 kg man playing hockey catches a puck moving at 25.0 m/s. The man is initially at rest. The man and the puck move together after the collision. The puck's mass is 0.16 kg. What is the final velocity? A. 4.00 m/s B. 1.00 m/s C. 13.6 m/s D. 0.05 m/s
Friday, June 17, 2016 by Anonymous

physical science
An 85.0 kg man playing hockey catches a puck moving at 25.0 m/s. The man is initially at rest. The man and the puck move together after the collision. The puck's mass is 0.16 kg. What is the final velocity?
Friday, June 17, 2016 by nnd43

science
one ballon is in the freezer and other is at room temprature wht is the size of baloon in freezer
Friday, June 17, 2016 by Anonymous

Management Science
For your phone calls, you can either A) buy a prepaid monthly plan, or B) pay as you go. A cost $50 per month and calls are free up to 8hrs. Any extra min for that month will cost you $.25. B has a cost of $.15 per minute. What are the two total cost if you plan to talk for 5 ...
Friday, June 17, 2016 by Karen

SCIENCE
(a) Calculate the pH of a 0.15M acetate buffer (a solution containing 0.1 mol/L acetic acid and 0.1 mol/L sodium acetate), given that the pKa of acetic acid is 4.7. (b) What would be the pH value after adding 0.05 mmol of sodium to 1l of 0.2 mol/L acetate buffer?
Friday, June 17, 2016 by INNOCENT

Science : Physics
Will an object accelerate if the forces are balanced? Why or why not? I know that the answer is that it will not accelerate but I'm having a difficult time explaining why.
Friday, June 17, 2016 by Morgan

science
calculate the momentum of a particle ,whose de Broglie's wave length is 0.1nm ?
Friday, June 17, 2016 by nitin

Science : Physics
A 15kg object takes 26.3 meters to stop because of friction. Assume no skidding. If the frictional force is 60 N, what is the initial velocity of the object?
Friday, June 17, 2016 by Morgan

Physical Science
A food company uses a calorimeter to measure the amount of heat produced whena breakfast food is burned. The temperature of 100 ml of water changes from 10 degrees celcius to 45 degrees Celcius. How many calories are released?
Thursday, June 16, 2016 by Keo

science HELP PLZZ!!?!?!??!?!!??!
ok i need a little help.. I dont want to sound like a pathetic person but I need help with this question 19.What is global warming?what can people do to reduce global warming? I'm having a hard time... all I need some one to do is explain what it is and i will go from ...
Thursday, June 16, 2016 by othilia

science
what is apical meristem
Thursday, June 16, 2016 by sim

Science
An object is moving with uniform acceleration and it's velocity after 5 second is 25m/s after 8 second it is 34m/s find distance travelled by object in 12 second
Thursday, June 16, 2016 by Harsh

Science
A body covers 80 meter in 7th second,124 meter in 9th second, how much shall it covers in 15 second?
Thursday, June 16, 2016 by Harsh

science
two forces are in the ratio 1:2 named p and q.if their resultant is at an angle tan inverse root 3 /2 to vector p then the angle between p and q is ?
Thursday, June 16, 2016 by sharath

science
identify the type of reaction when hydrogen sulphide gas burns in oxygen to give water and sulphur dioxide
Thursday, June 16, 2016 by shivani

physics of science
a ball thrown vertically upwards with a speed of 20 m/s strikes a target after peneterating a distance of 0.01 in target.calculate the reterdation produced by target.
Thursday, June 16, 2016 by ruhaan

science
A skier with a mass of 60.0 kg starts from rest and skis down an icy (frictionless) slope that has a length of 53.0 m at an angle of 25.4° with respect to the horizontal. At the bottom of the slope, the path levels out and becomes horizontal, the snow becomes less icy, ...
Wednesday, June 15, 2016 by Anonymous

science
what is the unit of thermal capacity?
Wednesday, June 15, 2016 by Puja

science
what is the concentration of the mixture of two mixture if two quarts of 30% acid solution is mixed with 3 pints of 20%acid solution
Wednesday, June 15, 2016 by tasu

science
The mass of the girl in earth is 24kg. What is her mass and weight in moon if the moon's gravity is 1/6 of the earth' gravity?
Wednesday, June 15, 2016 by angela

science
Suggest an experiment to compare the conductivity of electricity by iron, copper, aluminium and zinc. Perform the experiment and prepare a short report on the resu
Wednesday, June 15, 2016 by rohit

science
When you return to your house from school, what is your displacement
Wednesday, June 15, 2016 by Anonymous

st.joseph science
Calculate the molecular formula of a compound whose empirical formula is CH2O AND vapour density is 30
Wednesday, June 15, 2016 by deepika

science
3×10^18 photons of a certain light radiation are found to produce 1.5 j of energy. calculate the wavelength of light radiation
Tuesday, June 14, 2016 by Anonymous

physical science
you are riding in a car traveling at 60mi/hr in a 50 mi/hr zone. you spot a policeman 10 feet ahead. you slow down with an acceleration of -2ft/sec2 for 3 seconds. Do you get a ticket
Tuesday, June 14, 2016 by ed

science
percentage of water of crystallization in Fe(NO3)2
Tuesday, June 14, 2016 by Peter

SCIENCE
WHAT IS THE WORK OF MITOCHONDRIA
Tuesday, June 14, 2016 by Anonymous

science
what is the ratio of SI units to CGS units of momentum? how do you measure the effect of an impulsive. force on the body
Tuesday, June 14, 2016 by tanishq

science
a bullet of 10g strikes a sand bag at a. speed. of 100…6m/s and gets embedded after traveling 5 cm. calculate 1) the resistive force exerted by sand on the bullet 2) the time taken by the bullet to come to rest
Tuesday, June 14, 2016 by tanishq

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