Science

Recent Questions

7th Grade Science Help Please
For his science project, Austin wants to determine if the pH of standing rainwater and places it indoors in a spot that does not receive a lot of sunlight to limit evaporation. Using a pH testing kit, he measures the pH of the water once a day for 20 days. What is the ...

Science
Find the gravitational acceleration if a spaceship at a distance equal to double of earth's radius from the centre of the earth (g on earth is 9.8 m/s)

Science
If the trend in the graph continues through the summer, what would you expect the average high temperature in Louisville, Kentucky , to be in August? Please respond as soon as you can, Thanks!

science
Which of the following is not a possible cause of mass extinction? A. Geographic isolation B. Failure to evolve C. Meteorite impact D. Temperature reduction i say A

science
When a 2.00 g sample of Al2(SO4)3·xH2O is heated to remove all water, a mass of 1.03 g remains. Determine the value of x.

science
20 gm of ice and 20 gm of hot water are mixed. When the ice is melted the temperature of the mixture was found to be 0'C, the temperature of hot taken should be (L=80cal/gm)-

science
What is not present in animal cell if nucleus is absent

Science
A science teacher was curious to see whether offering money for good grades would increase student performance on a test. The teacher offered half of the students in the class $5.00 if they got an A on their next test. The other half of the class was not offered any money. ...

Science
A student mistakenly used an ethanol solution containing an unknown ionic compound in part C of the experiment. How would this affect the Van't Hoff factor determined experimentally? Justify your answer with an explanation.

Science
If an experiment disproves a scientist’s hypothesis, what should the scientist do next? Develop a testable question. Revise the hypothesis and try the experiment again.*** Develop a theory based on the data gathered in the experiment. Change the dependent variable.

Science
In general, what would a scientist do after forming a testable question? Design an experiment. Develop a hypothesis**. Draw a conclusion. Analyze data.

Science
John took 45 minutes to bicycle to his grandmother's house, a total of four kilometers. What was his velocity in km/hr?

Science
A car travels at a constant speed of 30.0 m/s for 0.80h. Find te total distance traveled in km.

physical science(elecrostatics)
A(-9x10^-9 C) 20mm B(5x10^-9 C) (a)calculate the force between the charges (b)if A comes in contact with B Calculate the new charge on A and B

science
a tennis ball of mass m strikes the massive wall with velocity v and traces the same path.calculate the change in momentum

science
How many grams of sodium hydroxide will be produced when 23 gram of sodium reacts with wates at ordinary temperature ?

Science
How do I write the correct dissolution reaction for BaCl2

Science
How many grams should be to taken to make 0.5 molar sodium bicarbonate in 100ml soiution.

chemistry
science

science!
i want you to review the (3)descriptions and the (4)questions and correct my answers of this worksheet called Scientific Method Bikini Bottom Experiments. tank you tutors for reviewing the descriptions and questions and correcting my answers. The Bikini Bottom gang loves ...

science
we brought a block of un sliced of cheese on the same day, and isn't moldy at all

science
A scientist makes the measurements shown in the data table below. She needs to know the total volume of her other samples. which of the following shows the total volume reported with the correct number of digits and units. Samole A 12.14 ML Sample B 3.400 ML Sample c 0.7 ML A...

science
if a car travels at 93 km\h, what rate is it traveling in km\min? we haven't used km yet and i am pretty confused

science
What is an example of physical science? I know it is movement but can you give an example in a sentance and explain please?

science
1.)Which of the following identifies a measurement its si unit, and the tool most commonly used to measure it ? A.)length,meter,ruler B.)temperature, degrees Fahrenheit, thermometer C.)Weight, gram , scale D.)volume, millimeter, meniscus

science
I had objects that I had to find the source energy then what it was converted to. Please check my answers: battery Powered Drill chemical--> mechanical and thermal Lava Lamp Electrical--> thermal and nuclear

Science Energy
My assignment was to give drawn examples of the 7 forms of energy. I am having trouble with Chemical and Nuclear. My science teacher used a plant as an example for chemical energy but I don't know what she meant. Also I can't think of an example for nuclear. Would a nuclear ...

science
A box weighing 180 newtons is hanging by rope as shown in the figure. Find the tension T¿.

science
Two workers pull horizontally on a heavy box, but one pulls twice as hard as the other. The larger pull is directed at 25.0 ∘ west of north, and the resultant of these two pulls is 530.0 N directly northward. Part A Use vector components to find the magnitude of each of ...

Science
In general what would a scientist do after forming a testable questions? -Design an experiment**** -Develop a hypothesis -Draw a conclusion -Analyze data

Science
A farmer wants to determine if a new fertilizer gives her a better crop yield than her old fertilizer. She spreads the old fertilizer in field A, which has a brand new irrigation system. She spreads the new fertilizer in field B, which has an irrigation system that will be ...

Science
Hoy can i name the entire physical universe?

School of Natural and Physical Science
Why is tert. butyl chloride being washed with aqueous sodium hydrogen carbonate

physical science
Which of the following statements is NOT true? A. You are exposed to nuclear radiation every day. B. Most of the nuclear radiation you are exposed to occurs naturally in the environment. C. Naturally occurring nuclear radiation is called background radiation. D. All natural ...

Physical Science
A 144 kg park bench made of iron sits in the sun and its temperature increases from 25 degrees celsius to 35 degrees celsius. How many kilojoules of energy does the bench absorb?

science
What are 3 ways plants can reproduce? I think it is asexual and sexual but I can't figure out what the third way would be.

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?

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