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Science

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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

science
Linear momentum of ball mass 50kg is0.5kgms-1find Velocity

Science
Compute the wavelength of an X-ray with a frequency of 6.0 1018 Hz.

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 ?

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

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

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

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?

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.

Earth science
the land will heat up the most because _____ ???

Earth science
How do the heating of land and water compare?

Science
The reaction between sulphuric acid and iron (III) hydroxide [Fe(OH)3] gives

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 ...

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

science
explain to to transfer heat from a electric stove?

Science
6.02 molecules of urea are present in100 ml of its solution . The concentration of urea solution is

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 on a shuttle is about 89 % ...

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.).

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.).

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?

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

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

Science
Write the word equation to show the chemical reaction taking place during acid rain?

science
out of following solution which possesses lowest osmotic pressure,highest boiling point and highest frezzing point 1M KCl,1MNa3PO4 and 1M glucose.

science
is the blob fish going extinct or is it still common? and does it have any Limiting Factors?

science
if the force is increased to 60n for the same box what will be the acceleration?

science
suppose a box is 2kg is push with a force of 40n what is acceleration?

Science chemistry
Which compound has the melting point of -23 degree Celsius and boiling point of 77 degree Celsius ? Thx....

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

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 transverse ...

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

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 ...

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)

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?

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????❓❔

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)

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 ...

science
a particle is projected vertically upward from ground with velocity 10 m/s. Find which time particle reaches highest point?

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.

Science
Calculate average velocity of a minute hand of 5cm long from between 6am to 6:30am

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 if there are ...

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

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

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

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

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?

science
one ballon is in the freezer and other is at room temprature wht is the size of baloon in freezer

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 ...

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?

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.

science
calculate the momentum of a particle ,whose de Broglie's wave length is 0.1nm ?

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?

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?

science HELP PLZZ!!?!?!??!?!!??!
ok i need a little help.. I don't 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 there ...

science
what is apical meristem

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

Science
A body covers 80 meter in 7th second,124 meter in 9th second, how much shall it covers in 15 second?

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 ?

science
identify the type of reaction when hydrogen sulphide gas burns in oxygen to give water and sulphur dioxide

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.

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, and ...

science
what is the unit of thermal capacity?

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

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?

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

science
When you return to your house from school, what is your displacement

st.joseph science
Calculate the molecular formula of a compound whose empirical formula is CH2O AND vapour density is 30

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

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

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