Science

Recent Questions

Science
How do i prepare 5M NH4NO3 from HNO3...because i don't have ammonium nitrate

Science
Luis is an avid baseball player. For his science project, he decides to test which type of bat is best for hitting home runs. Luis prefers to use an aluminum bat when he plays, so he hypothesizes that he will hit more home runs using an aluminum bat than a wooden bat. During ...

Science
Which of the following is a way to practice safe science? A. Rewrite directions. B. Taste chemicals. C. Wash your hands. D. Discard your apron.

science
Luis is an avid baseball player. For his science project, he decides to test which type of bat is best for hitting home runs. Luis prefers to use an aluminum bat when he plays, so he hypothesizes that he will hit more home runs using an aluminum bat than a wooden bat. During ...

Science
1. What is the difference between a scientific theory and a scientific law? A) A scientific theory describes a pattern of observations, while a scientific law is an educated guess based on observation. B) A scientific theory is based on a few experiments, while a scientific ...

science
A bus makes a trip according to the position–time graph shown in the illustration. What is the average acceleration (in km/h2) of the bus for the entire 3.5-h period shown in the graph?

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. ...

Mathematics in science
Can you check my answers please? 1. A student measures the volume of a liquid and finds it to be 40ML. How many significant figures are in the measurement? 1. 2** 3 4 2.Calculate the area, with the appropriate number of significant figures, of a rectangular room that is 14.10 ...

Science
Pineapple has high requirements for the fertilizer elements nitrogen (N), potassium (K), and iron (Fe), and relatively low requirements for the fertilizer elements phosphorus (P) and calcium (Ca). Although Hawaiian pineapples grow in red soils whose iron composition may exceed...

science
Animals with Bilateral symmetry have have a distinct head end have no definite shape can only move in one direction -------- all live in water

science
What is the importance of questioning in the SQ3R system? 1.) Questioning helps you read the material quickly. 2.) Questioning keeps your brian actively trying to find answers while you are reading. 3.) Questioning helps you identify questions that will be on the test. 4.) ...

Science
What are distinguishing features of animals? A. Generally, an animal body exhibits a definite symmetry, form and shape. B.Growth of the body occurs proportionately. C. Reserved food is glycogen. D. All of the above.

math/science
If 0 is t when the year is 1982, what would be the value of t in 1990? How many years is that? From 1982 to 1992 the cost of the manufacturing a PC has decreased by about the same percentage each year. The cost, C (in dollars), in year t can be modeled by C = 3440 * (3/4)^t ...

Science (Physics)
(3.2534x10^4m)+(7.25x10^6m)/(4.26442x10^​-3km)-(7.1299x10^-5km)

math/science
The total surface area of Earth is about 1.97 × 10^8 square miles. The surface area of land on Earth is about 5.73 × 10^7 square miles. Find the ratio of surface area of land to that of the entire planet.

Science
Which are reasons to get a claim peer reviewed? Check all that apply. A peer review verifies conclusions. A peer review proves everyone else wrong. A peer review maintains standards of the field. A peer review identifies sources of errors. A peer review gains direct funding.

Life Science
How are the three parts of a nucleotide attached to one another?

Computer Science Principles
I need to know what's wrong with my code and it's supposed to be in the Next-Line blocking style. import java.util.Scanner; public class AreaOfCircle{public static void main(String[] args) { double PI = 3.14159;double get_this; double v; Scanner keyboard = new Scanner(System....

Physics
how are the fundamental laws and principles of physics related to the complexity that we see in nature? 2) How do the laws of physics apply to other sciences such ad biology, chemistry, and earth science? Give a specific example to show the connection - is it because there ...

science
Bacteria in swelling on the roots of peanut plants convert blank gas from the air into compounds that the plants need to grow.

science
Suppose you are hiking along a trail. Make a comparison between your displacement and your distance traveled. Check all that apply. -Your displacement must be less than your distance traveled. -Your displacement must be greater than your distance traveled. -Your displacement ...

science
Do I need the comma after "months" here? Over the past 6 months, OvaScience has been continuously hammered down by short sellers.

math egd;science;algebra
Identify environment issues cause illhealth

Science
On a 120 km trip a motorist travels 60 km at 60 km/h. How fast must the motorist go for the next 60km in order to average 120km/h for the whole trip? i have attempted this question, yet the answers say it is impossible.

science
what are hydrocarbons?

science
If air at seal level with a temperature of 27C is forced up a mountain slope and the air's dew point at the condensation level is 14C at what elevation will condensation begin?

Physical Science,Maths, L.O,Life Science
What Subject do i need to study at FET Level if i want to become a Social Worker one day

science
1. According to the trend shown by the graph what volume of water would you expect after 35 seconds of dripping A. Approximately 10mL B. Approximately 12 mL C. Approximately 20 mL D. Approximately 25 mL 2. What is the relationship between the volume of water and dripping time ...

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 ...

Vezilwazi secondary school
I'm in grade10 and I'm doing Life Science,Maths.L,Business and Tourism........I want to be a Nurse it is Possible for meh to be that???? Help! My Number 0714410106

Science
A hollow iron cube has measures 5cm on each side and has a mass of 20g will the iron cube sink or float?

Science please help
I am doing a crossword puzzle that has statements that you write their answers in the right column. I have two that I can't get. Heart of a scientific investigation what I have so far: --e-t-- standard of comparison for checking the results of an experiment what i have so far...

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
1. Which skill involves creating representations of complex objects or processes A. Classifying B. Predicting C. Making models D. Evaluating 2. The mass of an object is described in what A. Meters B. Cubic meters C. Liters D. Grams

science
titrat m/20 oxzlic acid(20 ml) of by KMnO4

physical science
Calculate your average walking speed by measuring off a ten meter distance and walking at your normal pace while timing yourself with the second hand on the room clock or a watch. If you have a stopwatch, so much the better.

Chemical Science
What is a solid (One of the States of Matter) that is a alkaline/base (8-14 on the pH scale. Name as many as you can that doesn't include baking soda.

History,Maths Literacy,Geography &Life Science
Which carrer do path with this subject?

science
13. A ball is thrown vertically upwards and it returns to the thrower after 6 sec ( g=9.8 m/s2) Find. (i) The velocity with which it was thrown up. (ii) The maximum height it reaches (iii) Its position after 4 sec.

science!
i have 6 questions, each with an answer. i would appreciate if you review the questions check my answers. tank you very much tutors. variables and graphing assessment practice Ethylene is a plant hormone that causes the fruit to mature. The data below concerns the amount of ...

science
an aeroplane travels 280m down the runway before taking off.if it start from rest , moves constant acceleration and becomes airbone in 8 second what is its speedin m/s,when it takes off

science
In the cabin of a jetliner that cruises at 600km/h, a pillow from an overhead rack falls into your lap below since the jetliner is moving so fast, why doesn't the pillow slam into the rear of the compartment when it drops? What is the horizontal speed of the pillow relative to...

math
In a science experiment, the temperature fell 63 degrees Fahrenheit in 9 minutes. If the temperature fell at the same rate every minute, how many degrees did it change each minute? 63 divide by 9 = 7

science
write a plan on how to seprate iron filings and sodium chloride crystals

science
What will happen if you choose surface speed too low?

science
a particle moves 1/3rd of the distance in aspeed of 6km/hr and rest with a speed of 18km/hr.find the average speed?

Science
How many cell must a fungi have?

Science
what is the primary distinction of being an animal? A) ability to ingest B) Having a backbone C) Ability to turn sunlight into energy D)Ability to reproduce

Science
What are distinguishing features of animals?

Science
How many parts listed make up a plant or animal cell nucleus?

Science
Whenever Adrian plays his favorite video game he always A higher score if he plays well listen to music he wants to know if listening to music while playing video games affects other kids as well he decides to test all the boys in his class what should Adrian do to avoid ...

Science
Victoria discovered a new way to keep her hands warm on a cold day what scientific attitude is this an example of A. Creativity B. Skepticism C. Honesty B. Good ethics

Science
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
Which of the following means using specific observation to make generalizations A. Bias B. Subjective C. Deductive reasoning D. Inductive reasoning

Vaal reefs technical high school
Science redox reaction lesson

Science
Which of the following means using specific observations to make generalizations

science
how many years will have to pass before only 3% of radioactive isotope is left if there is a half ye

Science
How many parts listed make up a plant or animal cell nucleus?

Mmanotshe moduane high school
History,Maths Literacy,Geography &Life Science

science!
this question is not a question but 20 questions. i appreciate if you review all my answers, but i wont provide an answer for the last question (most probably since i didn't finish answering it or typing it out since i only have an hour to do that). now, let's get started. ...

Science
Use specific data from your experiment to defend or refute the following statements: Plants continue to grow throughout their lives by producing new plant material. Photosynthesis is required for this process to occur.

Science, chem
Develop a method to prepare 100 ml of 0.500mol/l aqueous CuSO4x5H2O solution. Include the water molecules that are hydrated to the crystals as given in the molecular formula, in your calculation of the molar mass. show all your calculations. Prepare the solution.

science
2.2. A hot air balloonist, rising vertically with a constant velocity of magnitude 5.00m/s releases a sandbag at an instant when the balloon is 40.0m above the ground as shown. After it is released, the sandbag is in free fall. 1. calculate the position and velocity of the ...

science
A grinding wheel with a 28cm diameter spins at rate of 2020 revolutions per minute. What is the linear speed of thge rim of the wheel?

Saint harkewal vidyapeet sr.secondry school
Science: The collapse of atoms into a single quantem state

science
Based on the oxidation numbers which compound is the oxidizing agent in the following reaction? 8Al + 3KClO4 ¨ 4Al2O3 + 3KCl

enlgish
not a question, just want you to check my revision of a draft with an action lead in. this is just the revision of the beginning, i may post more revisions of my draft for the middle and end, and will probably ask questions in the answer section. Revision For Beginning Opening...

science!
first go to my original question which has the data table with my name, anon, and the school subject as science! tanks. okay so i have a question and most likely will be posting more questions regarding of constructing a graph. my question is, x axis is where you put the ...

science!
i want you to check my answers for the questions and i might need help on constructing the graph that i need to do for problem 7. variables and graphing assessment practice some students wanted to investigate the effect of light on the growth of spanish needle seeds (bidens ...

Science
How are the types of ER related to the cell type?

Science
How does the cisternal space divide the cell?

Science
Which of the following statements is not true of using electron dot diagrams? A. The element's group number provides a clue about the number of valence electrons. B. An element with eight valence electrons is chemically unstable. C. Dots should be placed one at a time on each ...

IMT
Science: calc.the mass in gram of ammonium chloride with formulae mass 53.49g/mol that will be mixed in 1litre of distilled water to give 0.05

polytechnic of Namibia
Basic science, A hammer of mass is dropped from thew top of a roof of the two storey building to the ground. Another hammer of equal mass fell from a coffee table to the ground. Given than the height of the two storey building and the coffee table are 10m and 5m respectively...

physcial science
a student drops an object out of the window of the top floor of a high rise dormitory, how fast is the object traveling when it strikes the ground at the end of 3.4s

life science
investigation to determine whether expired air contains carbondioxide

science
a rocket is launched vertically at a height of 4km above the earths surface calculate the maximum height above the ground level

physics for Science
2) You take the following measurements for the distance a toy car travels in 10 seconds during each 5 trials: 157cm, 175cm, 162cm, 168cm, 187cm. What are the relative uncertainties of the distance and time measurements? Which measurement is the most uncertain? · (157 + 175 + ...

Science
If one third of 100 g of 27% aqueous sugar solution is taken in a beaker and 10 g of sugar is added to it, the concentration of the resulting solution will be

Science
A ball of mass 250 g, having initial speed v, moves along a straight path under the action of a constant net force of 8 N. If the ball has speed v after 2.5 s of its journey, then the value of v is?

science
Which of the following statements describes the aim of the person who threw the darts shown in the picture? (1 point) A*) The person’s aim was both precise and accurate. B*)The person’s aim was precise, but it was not accurate. C*)The person’s aim was accurate, but it ...

science (physics)
An applied force of 50 Newtons is used to move a 6 kilogram mass.The opposing friction force to overcome is 2 Newtons.

Science
the brakes applied to a car produces uniform retardation. the car covers 16m before stopping how long where the brakes applied

science
A block of mass 20gm moves along a smooth surface at a speed of 5m/s and collides with a spring constant 20N/m.what will be the maximum compression of a spring?

Physical science
A 70-kg man and a 50-kg woman are in a 60-kg boat when its motor fails. The man dives into the water with a horizontal speed of 3m/s in order to swim ashore. If he changes his mind, can he swim back to the boat if his swimming speed is 1m/s? If not, can the woman change the ...

Science
Scientific methodology is what distinguishes science from other disciplines. Explain

science
History as a process and history as a study are interdependent. Explain

Science-AP Chem
Determine the volume (in mL) of 1.0 teaspoon. 1 tablespoon= 3 teaspoons; 1 tablespoon= ½ fluid ounce. Can you help me solve this?

Science
Hello, I just started my chem class today and I am totally stuck on this question: Hurriance Katrina had the 2nd lowest ever recorded barometric pressure at 0.920 mb. Convert this pressure to units of… a. atmospheres. b. Inches of Hg. I know i need to convert but I'm not ...

Science
Hurricane Katrina, which hit the Gulf Coast of Louisiana and Mississippi on August 29, 2005, had the second lowest ever recorded barometric pressure at 920mb. Convert this pressure to units of atmospheres, and inches of Hg. 1 bar = 0.98692 atm 0.92 bar = 0.92*0.98692 atm = 0....

science
A boy runs a 100meter distance race in 20seconds as measured by an observer on earth.how long does it take according to an observer in space ship moving with speed of 0.98c for the boy to complete the run? What is the length of the track according to the moving observer?

science
the spectator ions of all substance that are soluble of the reaction

Mathematics in Science
Calculate the area, with the appropriate number of significant figures, of a rectangular room that is 14.10 m wide by 15.o m long. 212.m^2 211.5 m^2*** 29.1 m 29.10 m

Physical science
Consider the following reaction that occurs at STP:what mass of N2 gas is needed to react with 12g H2 gas?

science
. Three charges are positioned as indicated in the figure. Calculate net force exerted on the +15 µC charge by the +11 µC and +13 µC charges

science
when kcn reacts with nh4cl to give

life science
Determine whether expired air contains carbon dioxide

Science
Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life.

Science
Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life.

Physical science
Why is it necessary to use four different colours to represent each of the incident rays? Please help because lm not sure about my answer

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