Post a New Question

Science

Branches of Science

Recent Science Questions

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

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

  1. Pages:
  2. <<Prev
  3. 14
  4. 15
  5. 16
  6. 17
  7. 18
  8. 19
  9. 20
  10. 21
  11. 22
  12. 23
  13. 24
  14. 25
  15. 26
  16. 27
  17. 28
  18. Next>>

Post a New Question