Branches of Science
Recent Science Questions
(1)weathering of rock is a ......?......Change.
Thursday, August 4, 2016 by Fill in the blank.
Explain the measures toreduce the problems associated with mining and extraction of metal
Wednesday, August 3, 2016 by Peter
Weathering of rock is a ......?...... Change.
Wednesday, August 3, 2016 by Weathering
Write an equation to show reaction of pop with water
Wednesday, August 3, 2016 by raj
What is the molarity of a solution of sodium chloride which contains 0.5moles in 200cubic centimeters? #2.what volume of 1m solution of hcl will contain 10moles?
Tuesday, August 2, 2016 by thomas
list atleast ten healthy foods/smoothies/tonics with local produce that can help combat or reduse stress.
Tuesday, August 2, 2016 by esha
two vectors act at the same point on an object.a maximum resultant vector is obtained when the angle between these two vector is..
Monday, August 1, 2016 by nqo
A car drives for 100km at an average speed of 80km.how long will it take the car to cover the distance
Monday, August 1, 2016 by Nothile
A CRICKET BALL OF MALL 100G MOVING WITH A SPEED OF 30M/S IS BROUGHT TO REST BY A PLAYER IN 0.03 SECONDS FIND CHANGE IN MOMENTUM?
Monday, August 1, 2016 by AATHREYA KRISHNAN
TWO FORCES 8N & 10N AT AN ANGLE OF 30' ACTING ON A PARTICLE WHAT IS RESULTANT FORCE AND IT'S DIRECTION.
Monday, August 1, 2016 by BIHARI
A crow bar of length 2m is used to lift a stone of weight 200kg if the fulcrum is set apart from stone how much effort should be applied to the other end of the crowbar to balance it?
Saturday, July 30, 2016 by Anjana Subedi
In a species of rodent, fur colour may be black or brown and their tail length either long or short. A pair of rodents were crossed, and their progeny then allowed to interbreed. The result in the F2 were as follows: 29 with brown fur with long tails; 9 long tailed with black ...
Saturday, July 30, 2016 by Khalid
a cricket ball of mass 0.2kg moving with a velocity of 0.4second. find the average force.
Saturday, July 30, 2016 by faizan shabista
40 degrees north runs along 146th street on the north side of Indianapolis. What is the rotational velocity of the surface of the earth at 40 degrees north?
Friday, July 29, 2016 by A Bailey
a bullet is fired with velocity 55m/sec at a target.if if the sound of collision heard after 7second.find the distance between target and gun.(speed of sound in air=330m/sec
Friday, July 29, 2016 by nitNite
PACE INter Science Colldege
what is average rate in cm3/s of gasoline to the engine of a car travelling at 100km/hr if it averages 10km/l?
Friday, July 29, 2016 by ayesha
Science, English, math
Why do we live
Thursday, July 28, 2016 by Yo yo jo
Pressure is 50N/m2,area is 600cm2.Find force
Thursday, July 28, 2016 by Srinjoy
A motor boat starting from rest on a lake accelerate in a straight line at a constant rate of 3m/s for 8s. How far does the boat travel during the time?
Thursday, July 28, 2016 by Nimisha
When did the first human exist? And when did they start populating the earth?
Wednesday, July 27, 2016 by Isaiah
Sodium azide fully decomposes at 300 degrees celcius at a volume of 3,5 cubic decometer,calculate the mass of sodium azide pellets used
Wednesday, July 27, 2016 by wiseman Syabonga Xaba
A bullet of mass 100g moving with20m/sec .Strikes a wooden plank and peretrates up to 20cm.Calculate the resistance offered by the wooden plank.
Wednesday, July 27, 2016 by Raj
What is physics
Wednesday, July 27, 2016 by Yashesh
Ice has a critical angle of 49.8 degrees, explain or rectangular prism of clear ice can be used for the total internal reflection of light by 90 degrees
Tuesday, July 26, 2016 by zai
How many grams of hydrogen chloride are percent in 250cm3 of comercial 37% by mass hydro chloric acid solution? The density of the acid is 1.19gram/cm3.
Tuesday, July 26, 2016 by Anonymous
What is the concentration off alcohol solution that was prepared by dissolving 40cm3 ethanol in 160cm3 water
Tuesday, July 26, 2016 by Anonymous
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
How fast would a 20gram marble have to go to travel 9.5 inches. (Flat surface)
Monday, July 25, 2016 by Dalton
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
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
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
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
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
why the unit of work and energy are equal?
Thursday, July 21, 2016 by puja
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
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
WHAT CAN BE THE ARRANGEMENTS OF PARTICLES IN MERCURY
Wednesday, July 20, 2016 by SHAFAQ
According to chance what fraction of their children will have dimples?
Wednesday, July 20, 2016 by Haziq Mehboob
which sibstance has the least number of drops that can fit on the coin?
Wednesday, July 20, 2016 by ikhandlela
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
graphic organizer about the three type of boundary
Tuesday, July 19, 2016 by danica
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
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
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
Find gew of d following Kmno. K2cr2o7. Kno3
Monday, July 18, 2016 by Ndubuisi
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
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
all acids are not corrosive.justify this statement
Monday, July 18, 2016 by rahul
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
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
a satellite is moving in 36000km if it takes 24 hour what will be the speed?
Friday, July 15, 2016 by Anonymous
what is the equation for velocity?
Friday, July 15, 2016 by Anonymous
which physical quantity is given under the area of velocity time graph?
Friday, July 15, 2016 by Anonymous
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
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
If you weigh 300 N on earth, then what is your mass and weight in mars?
Thursday, July 14, 2016 by Charlaine
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
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
2kg water vapour 100degrees is condensed to water at 40degrees. The quantity of heat required?
Wednesday, July 13, 2016 by Hji
advantages and disadvantages of difusion
Wednesday, July 13, 2016 by deepak
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
A body of mass 20 kg has a momentum of 120 kgm/s.find its vvelocity?
Tuesday, July 12, 2016 by krishnam
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
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
what are some examples of suspension?
Monday, July 11, 2016 by Anonymous
what are some examples of a suspension? i need help!!!
Monday, July 11, 2016 by jane
A particle is dropped from height 100m and
Sunday, July 10, 2016 by Atul
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
What mass of limestone will produce 11.2g of lime
Sunday, July 10, 2016 by tehillah
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
Why is ozone can be describe as our friend
Sunday, July 10, 2016 by kim
Explain functions of water?
Saturday, July 9, 2016 by Dryden
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
Is a diploma a valuable asset?
Friday, July 8, 2016 by Linda Starks
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
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
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
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
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
claculate 50g of CH4
Thursday, July 7, 2016 by kushal
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
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
What is percentage yield?
Thursday, July 7, 2016 by solomon
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
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
What phase change represented by the equation I2 (s) I2 (g)
Wednesday, July 6, 2016 by Jordan Ramsey
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
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
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
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
type of cells stimulates other immune cells to attack and destroy foreign agent
Wednesday, July 6, 2016 by cate mburu
A molecule has 8percent sulphur.this Will have minimum molecular mass
Tuesday, July 5, 2016 by saranya
How many ml of alcohol are presentia,50ml bottle of rubbing alcohol?
Tuesday, July 5, 2016 by jason ty
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
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
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
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
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
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
Write the pseudocode & flowchart that recieves a letter from a user and displays the corresponding color
Monday, July 4, 2016 by JAJA