Saturday
August 27, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

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

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

science
A chemist combines copper (Cu) and silver nitrate (AgNO3) in a beaker. She then "magically" pull silver out of the beaker. explain these results using your knowledge of chemical reactions.
Monday, June 13, 2016 by tina

science
1. What form of pollution, if any, does each energy source cause? 2. How does the economy influence energy source choices? 3. How does location influence energy source choices?
Monday, June 13, 2016 by AnimeLovelyLover

science
A gas in a sealed container has a pressure of 50 kPa at 27°C. What will the pressure of the gas be if the temperature rises to 87°C?
Monday, June 13, 2016 by Anonymous

Science
Iodine-131 is used I'd diagnosing certain medical problems because of the short half-life, which is 8.02 days. Assume the hospital lab uses for 4.52g of iodine-131 in a month. What mass of this radioisotope remains in patients after 32 days?
Monday, June 13, 2016 by Gigi

engineering science
An aeroplane can fly at 250 km/h in still air.How long will it take it to reach a plane 500 km to south-east if a wind is blowing at 80 km/h from west?
Monday, June 13, 2016 by Thabile Ndlovu

Science
If 100 bacteria get into our body and reproduce every 20 minutes how many will there be in 2 hours? Search answer.
Monday, June 13, 2016 by Sonu

SCIENCE
A BRICK WITH MASS OF 6 KG IS DROPPED VERTICALLY FROM A CERTAIN HEIGHT. IT TAKES 4.5 SECONDED FOR THE BRICK TO REACH THE GROUND DETERMINE THE FF. THE HEIGHT FROM WHICH THE BRICK IS DROPPED THE SPEED OF WHICH THE BRICK THE GROUND IT AND THE MOMENTUM OF THE BRICK THE MOMENT JUST ...
Monday, June 13, 2016 by BRONWYNNE

science
what is IUPAC name of ch3-ch2-ch2-ch2=ch2 ???
Monday, June 13, 2016 by somesh pali

Engineering science
A ball is thrown upwards and reaches the ground once again after 7sec how can I calc the total distance covered by the ball.
Sunday, June 12, 2016 by Thandeka

Health Science
(3) Write in full (i) H.I.V -Aids (ii) F.G.M
Sunday, June 12, 2016 by somay

Health Science
Please help me. (2) Discus the following diseases under the following - heading) i. Causative agent ii. Method of transmision iii. Signs and symptoms iv. Control and prevent. 1-Gonorrhae 2- HIV and AIDS 3- syphiles.
Sunday, June 12, 2016 by somay

Health Science
1a) What are controceptive b) Name six types of controceptive c) Name 10 diseases associated with the reproduction system. Please help me
Sunday, June 12, 2016 by somay

Science
One of the least difficult wastes to deal with is nuclear waste. True False*** All the pluming fixtures and toilets should be low flow, which reduces the amount of water needed while still maintaining the pressure. True*** False American consumers have the lowest amount of ...
Sunday, June 12, 2016 by Kaai97

Science
The Environmental Defense Fund, The Friends of the Earth, and The Natural Defense Council, are all divisions of The Environmental Protection Agency. True*** False After the first Earth Day, the Sierra Club expanded to 20 states in 1970. In 1971, the anti-environmental group ...
Sunday, June 12, 2016 by Kaai97

math and science
A space shuttle with a mass of 4,06 X 10kg,orbits earth at a height of 720km above the surface of the earth.calculate the gravitational force experienced by the shuttle
Sunday, June 12, 2016 by Tsuu-mani

Science Chemistry
A sample of beer is 4.6% by Mass C2H5OH. The density of beer is 0.93 g/mL. What is the molar concentration of C2H5OH in this sample of beer?
Sunday, June 12, 2016 by Kay

Science
Two bodies,one held 0.98m vertically above other,are released simultaneously and fall freely under gravity.After 2 seconds,their relative separation is?
Sunday, June 12, 2016 by Amanpreet

science
A car covers 30 km at a uniform speed of 60km/h & next 30km at a uniform speed of 10km/h find the total time taken
Sunday, June 12, 2016 by ft jcch

science
how I can convert Fe(NO3)3.9H2O to aqueous solution containing 45%
Sunday, June 12, 2016 by hatem

Science
When we evaporate a salt solution salt crystals are left in the beaker or utensil but does the same thing happen in case of sugar solution?
Saturday, June 11, 2016 by Diana

Science
Oregon and Washington generate far more hydro-electric power than most states. How does all this hydro-electric power help keep our electric bills low (half the cost of electricity in many states)?
Saturday, June 11, 2016 by Kaai97

Science
What are two downsides to the dams that make all our hydro-electric power possible?
Saturday, June 11, 2016 by Kaai97

Science
Does Aldosterone increases or decrease urine production? Also does it result in higher sodium levels in the urine? Thank you
Saturday, June 11, 2016 by Mary Help please

Science
If 10g of magnesium reacted with 5g of oxygen how much magnesium oxide would you produce? How do you know?
Saturday, June 11, 2016 by Molly

leadership development
1.Even though Mike is a great basketball player, he tries with just half effort on drills during practice. This is an example of A wasting talent B getting distracted C allowing others to set goals 2.Jim would like to get a summer internship, but his dad thinks he should work ...
Saturday, June 11, 2016 by jacob

science
why tall tree broke more than short tree at strom.
Saturday, June 11, 2016 by Anonymous

science
a man is running. What is its kinetic energy?
Saturday, June 11, 2016 by Anonymous

science and technology
Which law of chemical combination is illustrated by the fact that 168gFe reacts with 72gH2O to from 232gFeO4 and 8gH2?
Saturday, June 11, 2016 by smriti

science
A 1000kg rocket is set vertically on its launching pad. The propellent is expelled at the rate of 2kg/s. Find the minimum velocity of the exhaust gases so that rocket just begin to rise. Also find rocket's velocity 10second after ignition, assuming the minimum exhaust ...
Friday, June 10, 2016 by swastik

Science
Why is that instantaneous rate of reaction does not change when a part of the reacting solution is taken out?
Friday, June 10, 2016 by Vikrant

science
The resistance of 10m long wire is 10 . Its length is increased uniformly by 25% by stretching the wire uniformly. The resistance of wire will change to (approximately) (A) 12.5 (B) 14.5 (C) 15.6 (D) 16.6
Friday, June 10, 2016 by janvi

Physical Science
If your mass is 76kg, find your acceleration.
Friday, June 10, 2016 by Hannah

Science
Your journey to the centre of the earth took 64 hours at 100km/h. What was the total distance you traveled??
Thursday, June 9, 2016 by Kim

basic science
calculate the work done when a person pushes a car from its stationary position to a distance of 50m applying a force of 200n
Thursday, June 9, 2016 by augustine samson

Science
A 450-g block is attached to a spring of spring constant 45 N/m and is in simple harmonic motion on a frictionless surface with an amplitude of 7.5 cm. A second identical block, moving at 12 m/s in line with the spring, strikes the first one when the spring is at its maximum ...
Thursday, June 9, 2016 by Lucy

Science
CU+H2SO4>CUSO4+H2O+SO2
Thursday, June 9, 2016 by Sunil behera

Science
What mass of iron metal can be obtained from the reaction of 45.6kg Iron (III) oxide Fe3O4 with carbon monoxide CO as given in the following equation? Fe3O4 + 4CO = 3Fe + 4CO2
Wednesday, June 8, 2016 by URGENT HELP

SCIENCE
a 2cm high object is placed at a distance of 20cm from concave mirror ,the real image is formed at 40cm from the mirror.calculate the focal length,size of image and magnification?
Wednesday, June 8, 2016 by SUPRIYA

Science
The volume of a gas increases from 18.7 m3 to 25.1 m3 while the pressure changes from 1.82 atm to 1.41 atm. If the initial temperature is 353 K, the final temperature of the gas is K.
Wednesday, June 8, 2016 by Jasmine

science
What are some ways to minimize impacts a water dam creates on the ecosystem?
Wednesday, June 8, 2016 by Delaney

Math
1. Subtract (4x + 2y) – (8x – 3y). –4x – y 12x – y 12x + 5y –4x + 5y 2. Determine the best name for the quadrilateral. Graphic rectangle rhombus trapezoid parallelogram 3. Which figure has rotational symmetry for an angle of rotation of 270°? ...
Wednesday, June 8, 2016 by Help me PLEASE

Science
What mass of iron metal can be obtained from the reaction of 45.6kg Iron (III) oxide Fe3O4 with carbon monoxide CO as given in the following equation? Fe3O4 + 4CO = 3Fe + 4CO2
Tuesday, June 7, 2016 by Road

Science
What is the equation of the street line that passes through the points 1 and -4 and 3 and 2
Tuesday, June 7, 2016 by Anonymous

Science
A student wants to neutralize 1000 ml of .25m lioh with 0.75m hbr. How much hbr are they expected to use? Sho your work.
Tuesday, June 7, 2016 by Mika

Science
what is the concentration of sulfuric acid if 0.25l of it is neutralized by 0.56l of 0.030m koh?
Tuesday, June 7, 2016 by Mika

Science
Which symbol correctly represents an element (D) whose atoms contain 15 protons and 20 neutrons? A. 20/15 D B. 15/20 D C. 35/15 D D. 15/35 D C?
Tuesday, June 7, 2016 by Ms. Sue Please help me

Science
Which of the following statements is not consistent with the results obtained in Rutherford’s gold foil experiment? A. The nucleus of an atom is positively charged. B. The nucleus of an atom contains almost all the mass of the atom. C. Atoms are composed mainly of empty ...
Tuesday, June 7, 2016 by Ms. Sue Please help me

Science
In order to analyze the wastewater containing cu2+ from a manufacturing process, 1.0L of water was evaporated to 10.0mL, then placed in a spectrophotometer tube. The absorbance was found to be 0.30. Using your calibration curve, calculate the number of milligram of Cu2+ in 1....
Tuesday, June 7, 2016 by Tyler

science
a farmer has sown seed too deep. what is he likely going to observe?give reasons.
Monday, June 6, 2016 by tushar

Science
Shale often contains fossils of leaves. Question: If the gastropods listed in line 3 and line 6 were collected from shale containing leaf fossils what would their possible age be? Question: Could you use radiocarbon dating to assign a numerical date/age to this rock unit? ...
Monday, June 6, 2016 by Jessica

Math
Jason measured rainfall for a science project. Last week it rained 3 1/8 inches in all. This week it rained 1 7/8 inches in one day and 2 3/4 inches on another. How many more inches did it rain this week then last week? Please explain how you got your anwser
Monday, June 6, 2016 by Cindy

Science
what the definition of age range in earth science?
Monday, June 6, 2016 by Jessica

Science ~ Astronomy
Which evidence provides support for the nebular theory: a) scientists have observed the formation of a distant solar system b) the nebular theory has been proven mathmatically c) astronomers have observed protoplanetary disks around distant newborn stars d) none of the above I...
Monday, June 6, 2016 by Zee

  1. Pages:
  2. <<Prev
  3. 1
  4. 2
  5. 3
  6. 4
  7. 5
  8. 6
  9. 7
  10. 8
  11. 9
  12. 10
  13. 11
  14. 12
  15. 13
  16. 14
  17. 15
  18. Next>>