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science
Draw a diagram that represents vector AB + BC =vector 3RD

answer check science
1. Which type of metal did Rutherford shoot alpha particles into? A)Copper B)Zinc C)Gold D)Platinum 2.When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be drawn from this observation? A)The beam was made of ...

Science
Consider which is not an example of how an object gains elastic potential energy by stretching is a trampoline part In what form are all potential energy the same What is making an ice block to melt Describe three forms of energy Imagine that you push on a large rock.At what ...

science
1. Which type of metal did Rutherford shoot alpha particles into? A)Copper B)Zinc C)Gold D)Platinum 2.When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be drawn from this observation? A)The beam was made of ...

Science
What describes the current model of the atom? A)That electrons and protons move randomly around a nucleus. B)Electrons travel as waves in the electron cloud that surrounds the nucleus. C)Electrons orbit the nucleus like planets orbit the sun. D)Protons orbit the nucleus like ...

science questions please answer at least 45minutes
1. The current atomic model would be revised if (1 point) better microscopes were being used to study its structure. better microscopes are invented in the future. new information about an atom’s structure is discovered. a new element is discovered in the future. 2. Melinda...

science
a boy is able to persuade his father to play with him in a seesaw. if the boy wanted to get on the seesaw and to balance his weight against his fathers at what point from fulcrum should he sit?

Science
How many grams of ammonia is produced when nitrogen is 84 grams

Science
Wolves: Moose: 6 10 3.Calculate the average of moose killed by one wolf in each territory. So, would I divide the number of moose by wolves, or wolves by moose?

Science
A uniform half meter scale is balanced at 60 cm mark.when weight of 10 gf and 30 gf are suspended at 20 cm and 90 cm mark respectively calculate the weight of scale

science
When a manganous salt is fused with a mixture of KNO3 and NaOH the oxidation no. Of Mn changes from +2 to what?

Science(physics)
A boy while driving to his school covers at the average speed of 15km/h.On his return trip along the same route, covers at the average speed of 25km/h due to less traffic.What is the average speed for the whole trip

Science Chemistry
LIST: SODIUM CARBONATE. CALCIUM CARBONATE. ZINC SULFATE. ZINC NITRATE. (a) State a pair of chemicals from the list above that can be used to prepare zinc carbonate by precipitation reaction involving mixing 2 aqueous solutions together. (b) Write a chemical equation for the ...

Science Chemistry
LIST: SODIUM CARBONATE. CALCIUM CARBONATE. ZINC SULFATE. ZINC NITRATE. (a) State a pair of chemicals from the list above that can be used to prepare zinc carbonate by precipitation reaction involving mixing 2 aqueous solutions together. (b) Write a chemical equation for the ...

Science Chemistry
LIST: Sodium carbonate. Calcium carbonate. Zinc sulfate. Zinc nitrate. (a) State a pair of chemicals from the list above that can be used to prepare zinc carbonate by a precipitation reaction involving mixing 2 aqueous solutions together. (b) Write a chemical equation reaction...

Science
What is the effect on molarity for NaOH when balance used to weigh KHP is not properly calibrated and always reads 0.15 g too low.

Physical science
Determine the centripetal acceleration of an automobile making a tight turn that has a radius of 256 m, if the is traveling at a velocity of 25.0 m/s as it turns.

Physical science
What was Jack's speed from 5 sec to 10 sec

science
what mass of silver(1)nitrate is needed to prepare 100cm3 of silver(1)nitrate solution,concentration 0.2mol/dm3? the mass of one mole of silver nitrate is 170g please help me with this question

science
did anyone do the lab for product that conserve resources unit 4 lesson 5

science
Which of the pancreatic secretions digests starch into dipetides (a) trypsin (b) lipase (c) amylase (d) chymotypsin

Science
Define love

Science
Who discovered an antibiotic called 'pencillin' and when?

Science
What is Ganga action plan?when it was launched.

Science
Why does the increased level of nutrients in the water affect the survival of aquatic organisms?

Science
Explain how would you can locate the pole star with the help of Ursa Major.

science
writing blanced decomposition formula of Ammonium Carbonate

Science
The act of looking at the two or more thing are alike or different.

Science
An object is projected at an angle of elevation of 45 degree with a velocity of 100m/s. Calculate it's range

Science
What is the function of eustachian tube?

science
Describe how you would investigate effect of pH on enzyme rate. draw labelled diagram?

Science
A craane lifts an 8000N height 75m to the top of a buildings in 30s. How much power does the crane use?

Science
Cutting down trees for -------------- can increase soil erosion. It fill in the blank. four grade science I do not know it.

4 th grade science
Cutting down trees for ---------- can increase soil erosion. can some one help me please with this. fill in the blank.

Science
During an experimento a sunny Day,stu dental pour water on the sidewalk.every 30 minutes,they check the water to record antes changes.after 1 hour,they observe that all the water is gone. What happens to the water?

Science
4th Grade Most processes change land slowly, but people can change the land----------------- What the answer

Science
During an experiment on a sunny day,students pour water on the sidewalk.Every 30 minutes ,they check the water to record any changes.After 1 hour, they observe that all the water is gone.What happens to the water?

science
write the represtation of a nitrogen atom with mass number 14 and atomic number 7

science
one mole of an ideal gas is allowed to expand isothermally at 29.3 degree celsius from a volume of 4.0 litres and pressure of 5.0 atm to a volume of 10.0l and pressure of 2.0atm

science
establisHey relationship between si unit and commercial unit of energy

science
When an object moves on a circular path what is a work done?specify the reason

Science
For a 5 kg rocket and a thrust time of 5 s, what thrust makes the rocket reach a height of 871 m?

science
the body system responsible for the exchange of gases between the body and the enviroment is the

Science
Depletion of what has been halted by a ban on the manufacturing of what

science
The Hoover dam is a hydroelectric power plant that converts the energy of falling water into electricity. Which of the following determines the amount of potential energy of the water stored in the reservoir of the dam? Choose all that apply. A.the electric potential energy of...

science
what is the greatest number of times a hummingbird will flap its wings in 15 seconds.

science
Find the area of triangle whose vertices are A(2,0)B(4,5)C(6,3)in vector method

science
Why the solution of aluminium sulphate in water is not clear

science
Why the solution of aluminium sulphate in water is not clear

physical science
How much heat is absorbed by a 70g iron skillet when its temperature rises from 24oC to 110oC? joules

physical science
A pendulum has 501 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom of its swing? joules

physical science
What is the speed of a bobsled whose distance-time graph indicates that it traveled 107m in 26s?

computer, science, java, software
Write a Java program to declare and store numbers from 1 to 10 in a single dimensional array and display the output in the following format. 1 2 3 4 5 6 7 8 9 10

computer,science, java
Inorder to motivate the employees, the company has decided to announce the different types of bonus depends up on the employee’s Grade. If the employee belong to Grade A bonus=20% basic Grade B bonus=15% basic Grade C bonus=10% basic Grade D bonus=7% basic Grade E bonus=5% ...

science
Write a java program using classes and object to read the em[loyee code (Integer), Imployee name (string), Basic salary )double), Category (Character)then calculate the bonus(double)and the total salary(double)eligible for each employ. The output should have the employee code...

science
Explain the purpose of a control in a scientific experiment

science
If a scientist wished to to determine the effect of a certain herbicide on wee growth he would include a control in the investigation. Suggest a suitable control in this case.

science
Describe how you would investigate effect of ph on enzymes rate. Draw a labelled diagram to show how you carried out the experiment

science
An astronauts boots weigh 100N on earth where the acceleration of free fall is 10m/s2. How much will they weigh on Mars where the acceleration of free fall is 4m/s2?

science
write balanced equation showing the reaction occurs when lead is added to a solution containing a mixture of aqueous silver nitrate and copper(ii)sulfate

science
An astronauts boots weigh 100N on earth where the acceleration of free fall is 10m/s2. How much will they weigh on Mars where the acceleration of free fall is 4m/s2?

science
Explain how end product inhibition can control enzyme activity in living cells

science
What is the unit for measuring enzyme activity? What is turnover number

science
A ray of light is incident at 40 degrees to a plane mirror. What is the angle between the incident and the reflected rays?

science
if there was a source of pollution in Smithtown bay, what role could a physical oceanographer play in understanding the impacts to other parts of long island sound?

maths and science
A block of wood of volume 25 cm floats in water with 20 cm of its volume immersed calculate it's density and weight

science
w YoState, most of the surface bedrock was formed as a result of which process? a. deposition of sediments into a vast of sea. b, folding of non sedimentary rock. c. metamorphism of sedimentary rock. d. intrusion of magma into sedimentary rock.

science
a mushroom absorbs food through its

science
At what temperature do hydrdogen molecule have the same rms speed as nitrogen molecule at 455 degree celsius

Science
What will be the final temp of the ice of 20g when it is heated to 1600 Cal

science
A ball of mass 100 gm is thrown vertically at a speed of 10 m/s . find its kinetic energy

Science
if two spheres,having a weight of 10kg each at a distance of 50 cm find the gravitational force between them

Science
Mass of ice is 0.015 kg and that of water is 0.05 kg. Both are at 0°C. Find the final mass of ice and water.

Science
D)The blood of the vessels near the small intestine is often acidic after a meal. suggest a reason for this.

Computer Science
C program to find given string has alphabets, digits and special characters in it

Science
Determine the pH of a 0.62M NH4NO3 solution at 25oC. The Kb for NH3 is 1.76x10-5. Calculate Ka

Biology science
What is the nature of the phloem vessels after they are stained in the microscopic sections

Science
Identify the nature of the walls of the phloem vessels after they are stained in the microscopic sections

Science
Determine the pH of a 0.62M NH4NO3 solution at 25oC. The Kb for NH3 is 1.76x10-5. Calculate Ka

Engineering science
A man throw a ball upward with velocity of 30m/s.1.5 seconds he throw anothe wih the same velocity. Identify at what high will te ball pass one another?

Applied Science Chemistry
A 0.5g mixture of Cu and CuO was treated with hydrogen at elevated temperature. CuO was reduced to Cu. Q1.) write a balanced equation for the reaction Q2.) before the experment, calculate the minimum amount in mole of hydrogen required to ensure the reduction is completed

science
if yourweight is 60N on earth,how far should you go from the center of the earth so that your weight will be 300N

Science (physics)
The driver of a car travelling along a straight road with a speed of 72km/hour observe a signboard which give a speed limit to be 54 km/hour. The sign board is 70m ahead when the driver applies the break calculate the acceleration of the car which will cause the car to pass ...

Physical Science
Sodium (Na) reacts with chlorine gas (Cl2) to form sodium chloride (NaCl) as shown in the equation 2Na+Cl2=2nacl If 4 moles of sodium react, how many moles of chlorine gas will react? I have no idea what to do.......... I need some assistance thanks

science
no. of mole in 4.4 g Co2 is ……… .

Science: Physics
We use an electric immersion heater to heat 2,0 liters water having temperature of 20C to the boiling point. Specific heat capacity of water is 4,19 kJ/(kg c). The power of the heater is 1,50 kW and efficiency of heating is 80 %. How much time does the heating take?

Science: Physics
An electric heater of power 2500 W is connected to a voltage of 230 V. i) Calculate the electric current going through the heater. ii) What is the resistance of the heater? iii) How much energy does it consume in a year, if it is switched on 15 min every day. iv) How much it ...

Science Chemistry
Phosphorous (P) is an indispensable nutrient in food production. According to the estimates, mineral phosphorous resources will end up within 50 years and consequently new sources of P has to be found. A human excretes 2,2 g of phosphorous (P) per day on average. In ...

Science Chemistry
according to the reaction below: 4 NO + 3 O2 + 2 H2O → 4 HNO3 a) 0,001 g of NO dissolves into 1 liter of rainwater and all of it transforms into nitric acid. What is the molar concentration of nitric acid in the rainwater? b) Supposing that no other acids are dissolved in ...

Science Chemistry
The elementary analysis of 22 g hydrocarbon sample results in 18 g C and 4 g H. a) Choose the correct chemical formula of the hydrocarbon: i) CH4 ii) C2H4 iii) C3H8 b) What is the amount of CO2 in grams formed by the total combustion of hydrocarbon? Assume complete combustion...

Science
A driver of a moving car at 20m/s finds a child on the road 50m ahead and stops the car 10m earlier to the child. If the mass of the car with driver is 1000kg, calculate the force exerted by the brakes of the car??

Science
Our electricity bills consist of many different forms of energy use. In order to be able to make estimates on how much different appliances use electricity and how much savings could be done by investing less electricity consuming ones, you need to have understanding on ...

Science
b) Two families Mäkinen* and Nieminen* travel by cars a distance of 185 km. In the middle of the travel both have a break of 20 min. During driving family Nieminen has an average speed of 90 km/h. Family Mäkinen drives the first part at an average speed of 70 km/h. What ...

Science
Energy management has become a crucial field in increasing the efficiency of our everyday use of energy. One of the most energy consuming activities is the boiling of water. In order to understand the energy consumption, you need to have understanding on thermodynamics and ...

Science
Traffic in the cities releases NOx gases into the atmosphere (in the form of NO and NO2). NOx gases contribute to rainwater acidification by dissolving and transforming into a strong acid (HNO3, nitric acid) according to the reaction below: 4 NO + 3 O2 + 2 H2O → 4 HNO3 a) 0,...

Science
10. ALTERNATIVE B The elementary analysis of 22 g hydrocarbon sample results in 18 g C and 4 g H. a) Choose the correct chemical formula of the hydrocarbon: i) CH4 ii) C2H4 iii) C3H8 b) What is the amount of CO2 in grams formed by the total combustion of hydrocarbon? Assume ...

Science
Phosphorous (P) is an indispensable nutrient in food production. According to the estimates, mineral phosphorous resources will end up within 50 years and consequently new sources of P has to be found. A human excretes 2,2 g of phosphorous (P) per day on average. In ...

science
In me is me In me is a twin Which is said to flee When slumber comes in

science
A ray of light travelling in air strikes water by making angle 30 calculate angle of reflection if refractive index of glass is 1.5

Science
May someone please review my last to science parts and let me know what is right and wrong

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