Science

Recent Questions

SCIENCE
WHAT CAN BE THE ARRANGEMENTS OF PARTICLES IN MERCURY

science
According to chance what fraction of their children will have dimples?

physical science
which sibstance has the least number of drops that can fit on the coin?

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

science
graphic organizer about the three type of boundary

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.

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 ?

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...

Fpb science
Find gew of d following Kmno. K2cr2o7. Kno3

science
When the balloon has deflated, is there any difference between the air pressure inside and outside of the balloon? Explain. Please explain i don't understand it ASAP

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 ...

science
all acids are not corrosive.justify this statement

science
The rate constant of a certain reaction is given by log K= 212/T Calculate the activation energy at 400K.

science
Give two reasons why the pressure decreases as blood flows along the capillary bed. =because it avoide the mixed up of the blood

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 ...

science
a satellite is moving in 36000km if it takes 24 hour what will be the speed?

science
what is the equation for velocity?

science
which physical quantity is given under the area of velocity time graph?

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 ...

Science
Calculate the amount of water produced by the combustion of 44g of propane and 16g of methane.

Science
If you weigh 300 N on earth, then what is your mass and weight in mars?

science
6.025*10^20 molecules of acetic acid are present in 500 ml of its solution .What is the concentration of the solution?

science
if the velocity of a progressive wave with a periodic frequency of 10khz is 330m/s.calculate it's wavelength.

Science
2kg water vapour 100degrees is condensed to water at 40degrees. The quantity of heat required?

science
advantages and disadvantages of difusion

science
5% w/v aqueous sodium chloride from this i have to prepare 1.6% w/v aqueous sodium hydroxide solution

science
A body of mass 20 kg has a momentum of 120 kgm/s.find its vvelocity?

science
how to remove blue color from ammonium sulfate solution which occurs dues copper content in the spent acid we generate

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?

science
what are some examples of suspension?

science
what are some examples of a suspension? i need help!!!

science
A particle is dropped from height 100m and

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

science
What mass of limestone will produce 11.2g of lime

science
if the velocity of a progressive wave with a periodic frequency of 10KHz is 330m/s. calculate it's wavelength.

science
Why is ozone can be describe as our friend

Science
Explain functions of water?[6]

science
I have 20%solution ofH2So4,100litres. I want 40%solution of 200lit. How many liter mix solution ofH2So4 of 98%

Science
Is a diploma a valuable asset?

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?

Science
The molarity of a concentrated acid is 1.15M .what volume of HCl is required to make 1l of 0.1M HC

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?

science
is it true that the theory of evolution collapsed on itself and that's why scientists don't believe in it?

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. ...

science
claculate 50g of CH4

Science
A person moves 30m north, then 20m east and finally 30 root 2m south west. Find the displacement of the person.

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?

science
What is percentage yield?

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

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??????

Science
What phase change represented by the equation I2 (s) I2 (g)

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.

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?

science
the number of moles of H2O2 required to completely react with 400ml of 0.5N KMnO4 in acidic medium are

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 ?

science
type of cells stimulates other immune cells to attack and destroy foreign agent

science
A molecule has 8percent sulphur.this Will have minimum molecular mass

science
How many ml of alcohol are presentia,50ml bottle of rubbing alcohol?

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 ...

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.

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?

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

science
10, 20 and 30 are the three sets of vectors acting on a body.Then their resultant is ???

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.).

computer science
Write the pseudocode & flowchart that receives a letter from a user and displays the corresponding color

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 ...

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 ...

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?

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

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 ...

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

science
what is i for glucose

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?

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????

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?

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

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.

Science
Calculate the no. Off molecules atom in 360gm of water...??

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 ...

science
AgNO3+NaCL=AgCL+NaNO3 is not a redox reaction but Cu+2AgNO3=2Ag+Cu(NO3)2 is a redox reaction.explain

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

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

science
How Do the Earth's Four Subsystems Work Together?

science
how our heart work?

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.

science
number of grams of MgCl2 needed to prepare a 250ml of a 12% aqueous solution with 1.1g/ml density

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 ...

Social science
Write a diary entry relieving your days glory as Napoleon in exile at st.helena

science
How our heart work?

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

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.

yogi science
HOW are all living things alike ?

Science
What is the amount of oxygen needed to create output 20gm?

science
Find the acceleration of a lift moving upwards with 2m/s acceleration, 20kg on the it & 1000N force

Science
Calculate the volume of solute percent in 90ml solution with 5%

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

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

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.

Science
What kind of a solution will you create if you add 17g of table salt to 50g of wAter at o'c?

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

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