Tuesday
July 26, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

Science college question
An object is placed 3cm in front of a convex mirror whose focal length is 12cm where is the image formed and what is it's nature
Monday, July 25, 2016 by Balaram Mohanta

Science
How fast would a 20gram marble have to go to travel 9.5 inches. (Flat surface)
Monday, July 25, 2016 by Dalton

Physical Science
Green light has a frequency of about 5.3Hz×1014Hz. Using the relationship c=fλ, find its wavelength in air.
Saturday, July 23, 2016 by Hannah

science
The initial and final temperatures of a liquid are (67.7+0.2)°C and (76.3+0.3)°C . Calculate the rise in temperature.
Friday, July 22, 2016 by Mishika

Science
What is the kinetic energy of 0.5 kg soccer ball that is travelling at a velocity of 3m/s?
Friday, July 22, 2016 by Anonymous

science
What is the density of a piece of wood that has a mass of 25.0 grams and a volume of 29.4 cm3
Friday, July 22, 2016 by hilda

Science
Arun has prepared 0.01 percent of solution of sodium chloride in water .Clculate mass of solute and mass of solvent.
Friday, July 22, 2016 by Sonu

science
why the unit of work and energy are equal?
Thursday, July 21, 2016 by puja

Science
I can be traced back to 3000bc, often go unnoticed, can be overhead, under feet or somewhere in between, evolution has changed me, am lighter than I used to be, and can protect your investment.
Thursday, July 21, 2016 by Scott

science
When a body hanging form a spring balance is immersed in water it floats just below the surface of water and shows 100 g loss in its water ? (1) what is the weight of the body in water? (2) what is the weight of the body in air? (3) what is the upthrust on the body? (4) what ...
Wednesday, July 20, 2016 by parag

SCIENCE
WHAT CAN BE THE ARRANGEMENTS OF PARTICLES IN MERCURY
Wednesday, July 20, 2016 by SHAFAQ

science
According to chance what fraction of their children will have dimples?
Wednesday, July 20, 2016 by Haziq Mehboob

physical science
which sibstance has the least number of drops that can fit on the coin?
Wednesday, July 20, 2016 by ikhandlela

science
a bullet of mass 20g traveling horizontally at 100m/s embedded itself in the center of block of wood mass 1kg which is suspended by a light vertical string of length
Tuesday, July 19, 2016 by Anonymous

science
graphic organizer about the three type of boundary
Tuesday, July 19, 2016 by danica

MATHS
THE AVERAGE MARK OF 4 GIRLS IN A SCIENCE TEST IS 6,THE MARKS OF 3 OF ZM ARE 5,7,4.FIND THE MARK OF THE 4TH GIRL.
Tuesday, July 19, 2016 by EZRA

MATHS
THE AVERAGE MARK OF 4 GIRLS IN A SCIENCE TEST IS 6,THE MARKS OF 3 OF ZM ARE 5,7,4.FIND THE MARK OF THE 4TH GIRL.
Tuesday, July 19, 2016 by Anonymous

Science
The potential energy of a projectile at its maximum height is equal to its kinetic energy there . If the velocity of projection is 20m/s its time of flight is ?
Tuesday, July 19, 2016 by Ruby

science
3 charges are arranged along the x-axis. q1 = -4.50 nC is located at x = 0.200m q2 = +2.50 nC is located at x = -0.300m q3 = is a positive character located at the origin. What is the value of q3 for the net eletric force on it to be 4*10^-6 N? I found the charge on q3 to be...
Tuesday, July 19, 2016 by andrei

Fpb science
Find gew of d following Kmno. K2cr2o7. Kno3
Monday, July 18, 2016 by Ndubuisi

science
When the balloon has deflated, is there any difference between the air pressure inside and outside of the balloon? Explain. Please explain i dont understand it ASAP
Monday, July 18, 2016 by nanni

Science
1.Two stones are dropped from the top of a tower at an interval of 3 seconds.the relative velocity of the first Stone with respect to the stone at any instant during their fall is?? 2.if density, acceleration and force are taken as basic quantities, then time period has ...
Monday, July 18, 2016 by Nasrin

science
all acids are not corrosive.justify this statement
Monday, July 18, 2016 by rahul

science
The rate constant of a certain reaction is given by log K= 212/T Calculate the activation energy at 400K.
Sunday, July 17, 2016 by Aditi Arya

History,maths literacy,life science,geography
Which career path can i follow?
Saturday, July 16, 2016 by Kgalalelo

science
A cricket ball of mass 0.4 kg moving with a velocity of 72 km/h is brought to rest by a player. Find the magnitude of the average force exerted by the player? we have, F= m x a to find acceleration we want either dist(s) or time(t) it is not given how to find they have given ...
Friday, July 15, 2016 by nidhi

science
a satellite is moving in 36000km if it takes 24 hour what will be the speed?
Friday, July 15, 2016 by Anonymous

science
what is the equation for velocity?
Friday, July 15, 2016 by Anonymous

science
which physical quantity is given under the area of velocity time graph?
Friday, July 15, 2016 by Anonymous

Science-light
Shawn wanted to find out which of the four materials A, B, C and D allows the most light to pass through. He was given the following items: - A torch - A ruler - A light sensor connected to a datalogger - Four different materials A, B, C and D Shawn carried out his experiment ...
Thursday, July 14, 2016 by chimingbell

Science
Calculate the amount of water produced by the combustion of 44g of propane and 16g of methane.
Thursday, July 14, 2016 by Praneetha N Upadhyaya

Science
If you weigh 300 N on earth, then what is your mass and weight in mars?
Thursday, July 14, 2016 by Charlaine

science
6.025*10^20 molecules of acetic acid are present in 500 ml of its solution .What is the concentration of the solution?
Thursday, July 14, 2016 by Kanchan

science
if the velocity of a progressive wave with a periodic frequency of 10khz is 330m/s.calculate it's wavelength.
Thursday, July 14, 2016 by versatile

Science
2kg water vapour 100degrees is condensed to water at 40degrees. The quantity of heat required?
Wednesday, July 13, 2016 by Hji

science
advantages and disadvantages of difusion
Wednesday, July 13, 2016 by deepak

science
5% w/v aqueous sodium chloride from this i have to prepare 1.6% w/v aqueous sodium hydroxide solution
Wednesday, July 13, 2016 by prabhakar

science
A body of mass 20 kg has a momentum of 120 kgm/s.find its vvelocity?
Tuesday, July 12, 2016 by krishnam

science
how to remove blue color from ammonium sulfate solution which occurs dues copper content in the spent acid we generate
Tuesday, July 12, 2016 by Anonymous

Math
Ivan finished 4/5 of his math homework problems and all 3 questions for his science homework before dinner . If he finished a total of 43 problems before dinner , what is the total number of math homework problems he was assigned?
Monday, July 11, 2016 by Janeya

science
what are some examples of suspension?
Monday, July 11, 2016 by Anonymous

science
what are some examples of a suspension? i need help!!!
Monday, July 11, 2016 by jane

science
A particle is dropped from height 100m and
Sunday, July 10, 2016 by Atul

science
Athlete of mass 70.0kg runs a 1000m race in 10 seconds calculate the kenetic energy possessed by the body
Sunday, July 10, 2016 by donkor

science
What mass of limestone will produce 11.2g of lime
Sunday, July 10, 2016 by tehillah

science
if the velocity of a progressive wave with a periodic frequency of 10KHz is 330m/s. calculate it's wavelength.
Sunday, July 10, 2016 by iornav Gideon

science
Why is ozone can be describe as our friend
Sunday, July 10, 2016 by kim

Science
Explain functions of water?[6]
Saturday, July 9, 2016 by Dryden

science
I have 20%solution ofH2So4,100litres. I want 40%solution of 200lit. How many liter mix solution ofH2So4 of 98%
Saturday, July 9, 2016 by prashant tripathi

Science
Is a diploma a valuable asset?
Friday, July 8, 2016 by Linda Starks

science
37. The temperature at sea level on the windward side of a mountain is 28 °C and the dewpoint is 18 °C. What is the LCL?
Friday, July 8, 2016 by Anonymous

Science
The molarity of a concentrated acid is 1.15M .what volume of HCl is required to make 1l of 0.1M HC
Friday, July 8, 2016 by Akansha

Science
An aeroplane takes off from runway making an angle of 30 horizontally at a speed 500ms find the height attained by the aeroplane after 15s?
Friday, July 8, 2016 by Yash

science
is it true that the theory of evolution collapsed on itself and thats why scientists dont believe in it?
Thursday, July 7, 2016 by isaiah

Science
sodium can be extracted by heating naturally occuring salt until it is molten. an electrochemical process is then used to extract the sodium. cl2 is produces at the anode and Na is collected at the cathode. write the half-reactions that occur at the anode and the cathode. ...
Thursday, July 7, 2016 by Lauren

science
claculate 50g of CH4
Thursday, July 7, 2016 by kushal

Science
A person moves 30m north, then 20m east and finally 30 root 2m south west. Find the displacement of the person.
Thursday, July 7, 2016 by Jayanta

science
A simple pendulum with bob of mass m and conducting wire of length L swings(is hanging ) under gravity thro' an angle 2theetha. The earth's magnetic feild component in the direction perpendicular to swing is B. the max potential diff induced across pendulum is?
Thursday, July 7, 2016 by somya

science
What is percentage yield?
Thursday, July 7, 2016 by solomon

Science
1953) Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH? A. 0 B. 1 C. 2 D. any one
Thursday, July 7, 2016 by Riya

science,physics,chemistry
According to our theory atomic size should increase in groups from top to bottom but in group 13 Aluminium has atomic radius 143 pm and Gallium has atomic radius 135 pm which is less WHY??????
Thursday, July 7, 2016 by Neh

Science
What phase change represented by the equation I2 (s) I2 (g)
Wednesday, July 6, 2016 by Jordan Ramsey

science
3.A rocket launched accelerates at 3.5m/s^2 in 5.90 secs and2.98m/s^2 in the next 5.98 secs and then experiences a free fall. What time will the rocket be in air? Assume that the rocket is launched from the ground.
Wednesday, July 6, 2016 by mano

Maths,geography,history,science,agriculture
It is possible to to do meteorlogist while i am doing this subjects:HISTORY,GEOGRAPHY,LIFE-ORIENTAT​ION,LIFE-SCIENCES,SEPEDI,ENGLISH AND MATHS LITERACY?
Wednesday, July 6, 2016 by Tumelo Faith Baloyi

Science
If pistons A,B andC of the apparatus given in the diagram are supposed to be friction less,what is the of the pistonB?what force is exerted on the pistonC?
Wednesday, July 6, 2016 by Bhawana

science
the number of moles of H2O2 required to completely react with 400ml of 0.5N KMnO4 in acidic medium are
Wednesday, July 6, 2016 by vijendra

science,physics
The focal length of a mirror is given by 1/f=1/u+1/v where u and v represent object and image distances respectively,The maximum relative error in f is ?
Wednesday, July 6, 2016 by Neh

science
type of cells stimulates other immune cells to attack and destroy foreign agent
Wednesday, July 6, 2016 by cate mburu

science
A molecule has 8percent sulphur.this Will have minimum molecular mass
Tuesday, July 5, 2016 by saranya

science
How many ml of alcohol are presentia,50ml bottle of rubbing alcohol?
Tuesday, July 5, 2016 by jason ty

math
please help me solve this problem quickly! John and Melanie are designing a science experiment for the school science fair. Their experiment requires a large amount of copper wire. They need 22 spools of copper wire that each contains 31 meters of wire. How many kilometer of ...
Tuesday, July 5, 2016 by Nicole

Science
A car is travelling in the velocity of 20m/s.After 30 sec it covers a distance of 1200m.calculate the accelaration of the car and final velocity of the car.
Tuesday, July 5, 2016 by Dev

Science
A car is traveling in the velocity of 20m/s after 30s it covers a distance of 1200m calculate the acceleration of the car and final velocity of the car?
Tuesday, July 5, 2016 by Dev

science
A massive particle at rest with mass M breaks up into two unequal 'u' to the right and the other piece travels at 'v'. to the left. What are the rest masses of these two pieces?
Tuesday, July 5, 2016 by Anindya biswas

Science
An object weighed 7N in air and 5N in water.If the object is immersed completely in water and the density of water is 1000kg m-3, calculate the ; (a) weight of water displaced, (b) Volume of the object (c) density of the object
Tuesday, July 5, 2016 by Hazi

science
10, 20 and 30 are the three sets of vectors acting on a body.Then their resultant is ???
Tuesday, July 5, 2016 by Laxman Kunwar

Physical Science
A 100-g chunk of 72 ∘C iron is dropped into a cavity in a very large block of ice at 0∘C. What is the mass of ice that melts. (The specific heat capacity of iron is 0.11 cal/g⋅∘C.).
Monday, July 4, 2016 by Hannah

computer science
Write the pseudocode & flowchart that recieves a letter from a user and displays the corresponding color
Monday, July 4, 2016 by JAJA

Math
In a group of 95 students , the ratio of students who like mathematics and science is 4:5 . if 10 of them like both the subjects and 15 of them like none of the subjects then by drawing a venn diagram,find how many of them like only mathematics and how many of them only ...
Sunday, July 3, 2016 by Abhi

Computer science
While you can pass only one argument into a function, you can return as many values as needed from a function. True False A library function saves time for the programmer because it allows for code reuse. True False Each function should be flowcharted separately. True False A ...
Sunday, July 3, 2016 by Lies

science
A lump of ice falls from an airplane as it comes it to land. If the ice hits the ground with a vertical speed of 85 m/s, what was the height of the plane when ice feel off?
Saturday, July 2, 2016 by Anonymous

science
a car is moving in a straight line with speed 5 m/s . it is stopped in 5s by applying the brakes . find : (i) the retardation (ii) the speed of car after 2s of applying the brakes
Saturday, July 2, 2016 by iya

Science
When 25.0 ml of a solution containing both Fe2+and Fe3 +ions is titrated with 23.0 ml of 0.0200M KMnO4(in dilute sulphuric acid), all the Fe2+ are oxidised to Fe3+ ions. Next, the solution is treated with Zinc metal to convert all the Fe3+ ions to Fe2+ ions. Finally 40ml of ...
Saturday, July 2, 2016 by Ali

maths
in a group of 40 students,30 like mathematics,22 like science and 14 like both,find the number of students who like mathematics only
Saturday, July 2, 2016 by nishan

science
what is i for glucose
Saturday, July 2, 2016 by Anonymous

Science
A bus is moving with a velocity of 10m/sec. A car wishesvto overtake the bus in 60seconds. With what velocity the car should chase the bus which is 1km ahead?
Saturday, July 2, 2016 by Nishant

Science
A gun fires 300 bullets per minute horizontally with a velocity of 500ms-1 . Each bullets mass us 3*10^-3 kg. what is the force needed to hold the gun in position????
Saturday, July 2, 2016 by Dacian

science (physics)
how far will a stone travel over level ground if it is thrown upward at an angle 30 with the horizontal and with a speed of 12m/s?what maximum range could be achieved with the same initial speed?
Thursday, June 30, 2016 by tena

science physics
a force acted upon a body by 3 given force is under equilibrium if f1 =10n and f2 =6n find f3 and angle
Thursday, June 30, 2016 by vaani

science
The least count of a screw gauge is 0.001cm.the diameter of wire measured by it is 0.225cm.find out percentage error in the measurement.
Thursday, June 30, 2016 by Anonymous

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

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