Science

Recent Questions

Science
A scientist studying the effects of gamma rays on marigolds gathered the data shown below. Hypothesis: Marigolds exposed to higher levels of radiation will not grow as well as marigolds that are exposed to less radiation Plant A: Gamma Rays (Rad/day) is 5. Water (mL/week) 50. ...

science
how many grams of nacl are required to completely neutralize of 1 M of h2so4

physics question
For a science fair competition, a group of high school students built a kicker -machine that can launch a golf ball from the origin with a velocity of 11.2m/s and initial angle of 31.5° with respect to the horizontal. a) Where will the golf ball fall back to the ground? b) ...

science
how to find no of g atoms and weight of an element ?

English II
1. Explain the difference between a mystery and a legend. 2. Create a list of at least five (5) of these proven and unproven beliefs about your chosen event. 3. Explain why each of the items in the list are proven or unproven. 1. A mystery is something that remains unexplained...

Science
Under the 1980 Low-Level Radioactive Waste Policy Act, each state must take responsibility for its non-defense related, low-level nuclear waste. If nuclear waste was NOT regulated and disposed of properly, which of these could be a possible effect? A) The risk of cancer in ...

Science
A car is braked so that it slows down with a uniform retardation from 15m/s to 7m/s while it travels a distance of 88m. If a car continues to slow down at the same rate, after what further distance will it be brought to rest?

Maths
In a class of 52 students 16 study science.1/3 of boys and 1/4 of girls. How many boys are in the class.

Science
what is the difference between mass and weight? The mass of an object is the amount of matter it contains, while its weight is a measurement of the force that gravity exerts on it. The mass of an object is always less than the weight of an object. The mass of an object is ...

maths
In a class 20 pupils like science, 13 pupils like history,8 pupils like both subjects and 9 pupilz do no not like either subject..use a Venn diagram to find how many pupils were in the class.....?? Help me

Science(help please)
1.What is the difference between an observation and an inference? 2.what is a easy way to remember the difference between qualitative and quantitative data? 3.What is the difference a law and a theory? 4.Why is it important to remove bias from scientific research?

science
Force F=5N acts to the right. Draw a fully labelled scale drawing of the 5 N force using a scale of 10:1N.

Science
which of the following describes scientific inquiry? (1 point) a statement that describes what scientists expect to happen in an experiment facts, figures, and other evidence gathered through observation the diverse ways in which scientists study the natural world a well-...

Science
1.What is the difference between an observation and an inference? 2.what is a easy way to remember the difference between qualitative and quantitative data? 3.What is the difference a law and a theory? 4.Why is it important to remove bias from scientific research?

Science
An aeroplane flying in the air dips with a speed of 360 km per hr in a vertical circle of radius is 200m the weight of the pilot sitting in it 75kg calculate the force with which the pilot presses his seat and plane is at lowest point and plane is at highest point

science,John Dalton
what did john dalton do at 12 that he carried out through his life? what was his ides on schemicals react? which theory did he come up with?

Science
Bob created an experiment to test what plants need to survive. He believes plants only need water to live. In order to test his hypothesis, Bob planted two of the same types of plant. Only one received water and sunlight. While the other plant only received water. He measured ...

science
ten tonics with local produce that can help to reduce stress

Science
What science field is Vantablack considered to be part of?

science
list with match stick figures/pictures of some exercises to release stress.

Science
How the adhesion and cohesion properties of water are linked to photosynthesis😐

PHYSICS/SCIENCE
How much heat must be removed from 5.0g of water at 10°C to become ice at 0°C ? (my name is Kevin and I changed it to KPL cuz there is another kevin here)

science
What is absolute zero temperature?

PHYSICS/SCIENCE
How much heat must be removed from 5.0g of water at 10°C to become ice at 0°C ?

Physics/Science
How much heat must be removed from 15.0g of water at 10°C to become ice at 0°C?

science
10ml of 1M H_2 〖SO〗_4 will completely neutralize 10ml of xM NaOH solution. what is the value of x

science
Calculate the pH of the solution 5ml of M/5,HCl+10ml of M/10 NaO

science
if 〖HNO〗_3 changes into N_2 O,then calculate the change in oxidation number.

science(chemistry)
A laboratory instructure gives a sample of Amino-powder to each if four students,1,2,3 and 4,and they weigh the samples.The true value is 8.72g.Their results for three trails are (1),8.72g,8.74g,8.70g (2),8.56g,8.77g,8.83g (3),8.50g,8.48g,8.51g (4),8.41g,8.72g,8.55g (A)...

Science
Why might a scientist estimate a measurement?

Science
Which of the following is not part of the cell theory? Cells are the building blocks of life. All living things are made up of cells. All cells are created from other cells through cell division. (MY ANSWER) The nucleus is the control center of the cell.

science
To answer these questions you will need to refer to the volume of water dripping over time graph that you created in your science notebook from interactive art plotting a line graph activity. 1. According to the trend shown by the graph what volume of water would you expect ...

Science
After creating a prototype, which of the following would not be an appropriate next step in the design process of new technology? Research the need. Test product safety. Troubleshoot problems. Obtain a patent.(MY ANSWER)

Science -Please answer
Brand X Brand Y No cleanser Area(mm2) Area (mm2) Area (mm2) 0,0,0 0,0.25,1.0, 0,0.50, ,0.20 2.75 1.25,3.0 Which of the following is a constant, or control variable, in this experiment? The brand of cleanser that didn't work. (MY ANSWER) The results observed over four days. The...

Science
Date X cleanser Y cleanser none 5/18/11 0 0 0 5/19/11 0 0.25 0.50 5/20/11 0 1.0 1.25 5/21/11 0.20 2.75 3.0 --------------------------------- Which of the following is a constant, or control variable, in this experiment? The brand of cleanser that didn't work. (MY ANSWER) The ...

Science
It can be inferred from the passage that radioactive dating is important for estimating the age of A) all known meters B) all existing planets C) the earth D) the trees

science
Torque due to action-reaction force is zero?

Science
How to prepare 10mM NaH2PO4?

science
Find the pressure exereted by a girl weighing 400N.standing on one heel of area 1cm square

Science 1 question help plz thank you
Which of the following is not true about bias. A. Personal bias involves the influence of your own likes and dislikes B. Ethical bias involves basing a conclusion on too little data C. Cultural bias is influence from culture in which you grew up D. Experimental bias is a ...

Science
1.How is scientific inquiry useful? 2.What does all scientific inquiry have in common? 3. define science and explain what scientists do.

science
calculate the number of molecules of hydrogen and carbon present in 4 gof methane.

science
what is the value f g on moon?

science
calculate the mass of 120 cc of nitrogen at NTP. How many number of molecules are present in it?

Science
Two forces whose magnitude are in the ratio 3 :5 gives resultant of 28. If the angle of their inclination is 60 °find the magnitude of each force

science
A spring fixed at one end can be streched by hanging standard masses from the other end. What masses is needed to achieve a stretching force of 5N?

Science
Which of the following is not a characteristic of life? A. maintains homeostasis B. composed of cells C. composed of atoms D. carries out metabolism C? Is that correct

science
what is the ratio between acceleration and velocity?

science
a 50 kg block is placed on an inclined plane with an angle of 30. then find the components of the weight (1)perpendicular (2)parallel to the inclined plane.

science
How to prepare 250ml (n/10) sodium hydroxide solution (NaoH)

Science
Which of the following is true? Mark all that apply. A. a hypothesis can be proved incorrect through experiment B. conclusions cannot disprove a hypothesis C. conclusions are made based on the analysis of data D. opinion is used to analyze data Is it A and C?

Science
Which of the following are examples of science? Mark all that apply. A. a journalist writes a story about a man who became rich by buying stock on Tuesdays B.a woman chooses an item to purchase based on its packaging C. a farmer consults a weather almanac to decide the best ...

science
list with match stick figures/give pictures of some exercises to release stress.

science
how will you separatea mixture of common salt,sand and iron fillings?

science
how are cohesion and adhesion properties of water linked to photosynthesis?

Science
If 50% if reactant is converted to product in first order in 25 minutes.how much of it would react in 100 minutes?

Science
A person can throw a stone to a maximum distance of 100m.the greatest height to which he can throw the stone is?

science
Why are pteriodphytes called most developed cryptogams

Science
A 500 kg horse pulls a cart of mass 1500 kg along a level horizontal road with an acceleration of 1m/s. If coefficients of the sliding friction between cart and ground is 0.2 then the force exerted by the horse on the cart in forward direction is:

maths
Ticket rate for the science exibition is 10rs for a child and 26 rupees for an adult. 740 rupees was got from 50person. How many children among them?

science
if a 3118tata commercial vehicle apply barke with abs system at the speed of 40km/h,how much distance cover to stop the vehicle speed of 0km/h

Science
What does sc mean on all jewlry items

Science
If a particle is projected at an angle of 30° to the horizontal with kinetic energy E then its kinetic energy at the topmost point would be?

Science
how do flowering plant that do mot have all four parts can make seeds?

Logical science
(1)weathering of rock is a ......?......Change.

Science
Explain the measures toreduce the problems associated with mining and extraction of metal

Logical science
Weathering of rock is a ......?...... Change.

science
Write an equation to show reaction of pop with water

science
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?

science
list atleast ten healthy foods/smoothies/tonics with local produce that can help combat or reduse stress.

science
two vectors act at the same point on an object.a maximum resultant vector is obtained when the angle between these two vector is..

science
A car drives for 100km at an average speed of 80km.how long will it take the car to cover the distance

SCIENCE
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?

SCIENCE
TWO FORCES 8N & 10N AT AN ANGLE OF 30' ACTING ON A PARTICLE WHAT IS RESULTANT FORCE AND IT'S DIRECTION.

Science
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?

Science (Biology)
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 ...

science
a cricket ball of mass 0.2kg moving with a velocity of 0.4second. find the average force.

Science
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?

science
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

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?

Science, English, math
Why do we live

Science
Pressure is 50N/m2,area is 600cm2.Find force

Science
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?

Science
When did the first human exist? And when did they start populating the earth?

physical Science
Sodium azide fully decomposes at 300 degrees celcius at a volume of 3,5 cubic decometer,calculate the mass of sodium azide pellets used

science(physics)
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.

Science
What is physics

science
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

Science
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.

Science
What is the concentration off alcohol solution that was prepared by dissolving 40cm3 ethanol in 160cm3 water

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

Science
How fast would a 20gram marble have to go to travel 9.5 inches. (Flat surface)

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

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.

Science
What is the kinetic energy of 0.5 kg soccer ball that is travelling at a velocity of 3m/s?

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

Science
Arun has prepared 0.01 percent of solution of sodium chloride in water .Clculate mass of solute and mass of solvent.

science
why the unit of work and energy are equal?

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.

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 ...

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