# Science

## Recent Questions

science
A bus starts from rest and attains 40km/hr velocity after 10sec . Calculate the acceleration of bus in m/sec2

Bachelor of computer science
A program is required to calculate the weekly pay for an employee. The pay clerk inputs an employee ID, hours worked and an hourly rate. The program will output the employee ID, and Gross Pay. Gross Pay is the sum of regular pay plus any overtime pay earned. Overtime pay is ...

Physical Science
An experiment was done. Pulling blocks of mass that were certain amounts of newtons. There were 2 tests done. However, they varied by a couple decimals after the second test. The results from the two tests differ slightly. Which would most likely cause the variations in these ...

science
#1. When the air under the envelope is heated, the balloon lifts. Which of the following statements is true. a. Hot air balloons use radiation to rise. b. Hot air balloons use conduction to rise. c. hot air balloons use convection to rise. d. hot air balloons use air ...

Physical Science
Determine how long it will take given the scenario below (in time and in distance) to react to the car in front of you. Assume that the car in front of you takes 3 seconds to change speeds. Reaction time 1.6 seconds Speed: 75 mph Initial velocity: 33.53 Final velocity: 29.06 ...

science URGENT!!
what is the relationship does wave height have with frequency? What is the relationship does wave height have with amplitude?

Science
Assume you are speeding down the freeway at 75 mph. The car weighs 1500 kg and the effective force of the brakes is 14400 N. The car in front of you suddenly slows down, it takes 3 seconds for the car to do so. Your initial velocity was 33.53 and your final velocity is 0. If ...

Science. HELP!!
If you decrease the frequency of a wave, how does the velocity change?

SCIENCE
A stone thrown from the top of a building is given an initial velocity of 40.0 m/s straight upward. The building is 70.0m high, and the stone just misses the edge of the roof on its way down, determine (A) The time at which the stone reaches its maximum height, (B) The maximum...

Science, Physics
Assume you are speeding down the freeway at 75 mph. The car weighs 1500 kg and the effective force of the brakes is 14400 N. The car in front of you suddenly slows down, it takes 3 seconds for the car to do so. Your initial velocity was 33.53 and your final velocity is 0. If ...

Science
When are tides in the earth's oceans the highest

science
Frogs hear with their _______ lining of their mouth tongue tympanum nostrils*** I'm not so sure about this question. I went back and looked in my book but i can't find anything, I searched it to and still couldn't find anything. Could someone please help me better understand ...

science(computer)
what line should i adopt after matric if i'm not good at maths???? (pakistan)

English
1. Write down four friends' names in the name column in the table. 2. You can communicate with others in groups with the five questions on the blackboard. 3. What is her mother asking of her? 4. I'd like you to introduce one of your friends in the table to the classmates. 5. ...

English
1. I can't do the science project myself. It's too difficult? What does it refer to? #2 or #3? 2. doing the science project myself 3. the science project --------------------------------- 4. I'm going to Tom's house to work on the science project. 5. I'm going to Tom's house ...

science
A golf ball was hit and projected at an angle of 65° with the horizontal. If the initial velocity of the ball was 60m/s.Calculate the time the golf ball was in the air and the horizontal distance the ball travelled

Science
What is the average speed in average velocity of a tip of minute hand in 1 hour where the length of the minute hand is 10 cm

Science
Place the following words into the in order gametes, sporophyte, gametophyte, and zygote. Explain how the terms are related.

Science- Air resistance
A question on air resistance using the parachute experiment. Make a parachute using plastic bag as the material for the canopy of the parachute. Drop parachute from a height to test how well it works. Hope someone can help me with the following questions: 1) Does a larger ...

Science! NEED HELP URGENT
What effect does amplitude have on velocity?

Science
Over time, a plant pollinated by a hummingbird has developed very long, tube-like flowers. Why might the flower have adapted in this way? A)The longer, tube-shaped flowers probably developed to keep the hummingbird from reaching and drinking the flower's nectar. B)The longer, ...

science
Which of the following would cause the greatest decrease in gravitational force between the earth and the moon? an increase in the earth's mass an increase in the moon's mass an increase in the distance between the earth and the moon a decrease in the distance between the ...

science
Which of the following is not a stage in the development of a thunderstorm? developing stage dissipating stage mature stage updraft stage

Science
A sample of gas has a volume of 356 mL at 740 torr and 25 C. What pressure will the gas exert at 50 C and 250 mL?

Science
An automobile starting from rest at t0 = 0 at x0 = 0 undergoes constant acceleration in a straight line. It is observed to pass two marks separated by 64 m, the first at t = 8s and the second at t = 12s. What is the value of the acceleration?

science
If you had a real thermometer that was accurate, how could you modify your experimental thermometer to read actual temperatures?

PUBLİC LAW, Political science, ir
You are a Spanish conquistador who just took control of a large territory in Americas in medieval time. Which political concept requires you that you should obey the orders of the Spanish King and not to administrate the land on your own??(this question is for my public law ...

Science
Which of the following is NOT a characteristic of an animal? Have eukaryotic cells digest their food make their own food******* have many cells with different functions

Science
How do you find the half life of strontium 90? I know that the answer is 28.8 years but how do you arrive at that answer?

science
Determine the amount of NaoH dissolved in 250ml of the solution by titrating it against N/10 H2so4 solution

science
three equal charges 2.0×10^-6 each ae held

Science
Say we have a jar of water, Is the angle of incidence, the angle that the the light enters the water, the angle above the water or the angle below the water?

Science
Since no one answered, and I really need help: So I am doing this science experiment about light. I chose to do one where you put a pencil in a glass of water and the light makes it look like it's bending. There is a chart of measurements that you need to fill out and I have ...

Science
Since no one answered, and I really need help: So I am doing this science experiment about light. I chose to do one where you put a pencil in a glass of water and the light makes it look like it's bending. There is a chart of measurements that you need to fill out and I have ...

science
In which temperature of water did the food coloring diffuse faster?Using your knowledge of the motion of molecules, explain the result

Science
So I am doing this science experiment about light. I chose to do one where you put a pencil in a glass of water and the light makes it look like it's bending. There is a chart of measurements that you need to fill out and I have no idea how to get them. I know you are gonna ...

Science
What is the mechanical advantage of a machine that used 600N to overcome a load of 1200

Forensic Science
If there are 45 drops of alcohol/mL, and the density of alcohol is 0.789 g/mL, what is the blood alcohol concentration of your unknown sample?

3. Nitrogen-fixing bacteria live in protective nodules (bumps) on the roots of some plants. These bacteria are able to convert gaseous nitrogen from the air into a form of nitrogen that the plants can use. Which type of relationship is this? ~mutualism*** ~predation ~...

Science
The basic activities of life occur in the _______ nucleus DNA mitochondria cell****

History
What impact did learning about classical science have on chirstinaity

science
A researcher put 10.0 moles of N2O into a 2-L container at some temperature where it decomposes according to the following: N2O = 2N2+ O2. At equilibrium 2.20 moles of N2O remain. Calculate the Kc for the reaction. How am I supposed to fill in the ICE chart if Kc isn't given ...

Physical Science
If you know the rate of movement along a fault, the amount of offset over a period of time can be calculated. The basic relationship is Rate = distance/time Movement along the San Andreas Fault is about 3.5 cm/yr. If a fence were built across the fault in 2005, how far apart ...

Physical Science
If the mid-Atlantic Ocean is spreading at 2.4 cm per year, how many years has it taken for it to reach its present width of about 5000 km?

science
Height of object is 1 cm placed at a distance of 15 cm from a concave mirror of focal length 10 cm. Find nature, size and position

Science
You digestive system has three main functions: digestion, absorption, and elimination. In which organ does absorption begin? A. Mouth*** B. Stomach C. Small Intestine D. Gall bladder

Science
A Ball Thrown Vertically Upwards From Ground Level Hit The Ground After 4s Calculate The Maxium Height During This Height

Computer Science
Data packets travel from router on layers 3 and 4. As this happens their headers change. Explain why this is the case with reference to ip and mac adresses.

Science
The Richter Scale is based on measurements of the ____ of a seismic wave. A. Speed B. Frequency C. Intensity*** D. Amplitude

SCIENCE CHECK!
1. One of the products of photosynthesis is carbon dioxide.*** fire. oxygen gas. mass. Am I right?

Physical Science
At a crime scene, the forensic investigator notes that the 7.0-g lead bullet that was stopped in a doorframe apparently melted completely on impact. Assuming the bullet was fired at room temperature (20°C), what does the investigator calculate as the minimum muzzle velocity ...

science
What do the bone marrow and the epidermis have in commen

science
what energy source can generate most of my home's electricity day and night????

science,
how does a nuclear power plant produce energy

Science
a factor wants to build a big tank to store chemicals the tank will be near a river which of the following is a possible result of building the chemical tank a. the chemicals from the facility would not have any effect on the environment b) the chemicals will pollute the river...

Science
Water that contains impurities conducts electricity because _______ carry the charge

Science
How many grams of potassium iodide crystals is needed to make 1M.

Science
Which of the following is an example of density? A. Ice floating on top of a river B. Convection currents that cause wind C. Oil spill cleanup D. All of the above Pls help Idk this..

science (chemistry)
consider the following reaction AgNO3+KBr=AgBr+KNO3 calculate the amount of presipitate in gram obtained when 0.25 mole of AgNO3 is trheated with excess of aqueous KBr solution

Science
1. How did planetesmals form planets? A. They broke apart into smaller chunks. B. They collided and stuck together.<<(I think it's this answer) C. They cooled and pulled ice together. D. They began to rotate. 2. What distance was used to define the astronomical unit (AU...

Science
1.What challenges does [your topic] pose to biodiversity? 2.What do you think should be done and why? Can someone help me plz!! i have to write a discussion.

Chemistry (science)
Which compound is likely to have a lower melting/boiling point?Hydrochloric acid or Potassium sulfate? Justify. Now I know that hydrochloric acid has the lower melting and boiling point because it is covalent and potassium sulfate has an ion-ion force acting on it. But the ...

Science
What is the morality of a solution made by dissolving 9.80 g of H2SO4 in a 200.0 g of H2O?

science
What is the momentum of a 10 kg mass at rest.

Chemistry (science)
how does the compound type (ionic, polar, non-polar) correlate to its properties (melting/boiling points)? I have a feeling it's something related to the forces acting on them but I'm confused around how.

Chemistry (science)
how does the compound type (ionic, polar, non-polar) correlate to its properties (melting/boiling points)? I have a feeling it's something related to the forces acting on them but I'm confused around how.

Science
Can someone please explain? This tool is called a McLeod rake, a tool commonly used in fighting forest fires or wild fires. It is used to clear vegetation in order to make firebreaks, and also to cut off stray branches. The metallic head part of the rake is often made out of ...

Science
Describe the elasticity of a golf club hitting a golf ball

Science
Explain the difference between Type 1 (T1DM) and Type 2 (T2DM) diabetes. What are the common risk factors associated with T2DM? (Use the abbreviations for Type 1 & 2 diabetes mellitus in your response; don’t forget to define them the first time you use them in your response...

Science
Identify the following types of tissue as connective, muscle, nerve, or ephithelial: A. Tendon - Muscle B. Sciatic Nerve- Nerve C. Fat - ? D. Blood Vessel - Nerve E. Skin - Ephithelial F. Ligament - ? G. Bone - ? H. Muscle - Muscle ( I got them all except for Fat, Ligament, ...

science
If you were making a tool used to handle live electrical wires, which class of materials would you most likely use? ASemimetals BMetalloids CNonmetals D Metals

Science
Identify the following types of tissue as connective, muscle, nerve, or ephithelial: A. Tendon - Muscle B. Sciatic Nerve- Nerve C. Fat - ? D. Blood Vessel - Nerve E. Skin - Ephithelial F. Ligament - ? G. Bone - ? H. Muscle - Muscle ( I got them all except for Fat, Ligament, ...

Health Science
"What is diabetes mellitus? What are the complications of the disease if left untreated?" I need an A+ worth answer. 150 Words. I would really appreciate if I could get some help. Thanks.

math/science
If y is directly proportional to √x ,will on increasing y by 200%, x will become 4 times

Science) Breast Cancer
Can you give me some facts about breast cancer?

Science, Physics
A particle moves through angular displacement ø on a circular path of radius r. The linear displacement will be

Engineering Science N4
The diameter of the ram cylinder of a hydraulic press is 200mm. The stroke length of the plunger is 50mm. the effort on the plunger is 5% of the load. Calculate, i) the volume of the liquid needed per stroke if the load has to be lifted 60mm in 30 strokes, if the slip is ...

science
if a body of a mass 4kg is acted upon at constant force of 12n at 2sec,calculate the kenetic energy gain by the body.

Science unit 9
What would you do to measure the volume of a baseball

Social science
Most major cities in core countries are postindustrial. Can you think of an example of a growing city that is still in its industrial phase? How is it different from most Canadian cities?

Physical science
Which of the following is not a use for radioactive isotopes? a.as tracers for diagnosing a disease b.as an additive to paints to increase durability c.as a way to treat forms of cancer d.as a way to study biochemical processes in plants

science
A species that influences the survival of many other species in an ecosystem is called a____? I have no clue please someone help!

Science
The attitude adopted by Calvin Coolidge that government should play a small role in business affairs is know as what? A. Regulatory*** B. Progressive C. Laissez-faire D. Restrictive I took an educated guess.

A solar eclipse can ONLY occur when the moon is in which phase? A) New Moon B) Full Moon C) Quarter Moon D) Crescent Moon A?

When the Sun is completely blocked out by the Moon a ________________ occurs. A) total solar eclipse B) total lunar eclipse C) partial solar eclipse D) partial lunar eclipse A?

Land near the ocean, along the coast, experiences weather that is more moderate than the inland climate. So, along the coast, you can predict that compared to inland weather, it should be __________ during the summer, and __________ during the winter. A) cooler; warmer B) ...

If Earth were located where Mars is in space, the temperature of Earth would A) be significantly higher. B) be significantly lower. C) be about the same. D) fluctuate greatly. B maybe?

Science
Water on Earth is either freshwater or saltwater. What is the percent ratio of freshwater to percent saltwater on Earth? A) 1% freshwater : 99% saltwater B) 3% freshwater : 97% saltwater C) 30% freshwater : 70% saltwater D) 50% freshwater : 50% saltwater I think it is either ...

Science
The sun's apparent motion across the sky from East to West daily is due to the A) rotation of the sun. B) rotation of the earth. C) orbit of the earth around the sun. D) orbit of the sun around the earth. I think the answer would be c.

Science
Hi! I'm in 8th grade science 8-B in Connections academy. I have a question that I'm stuck on. Can anyone help me? Thx! 2. Where do most Earthquakes occur most often? Why I am taking a guess that areas such as California have more earthquakes than most. I don't know why areas ...

Science
Which is more harmful tannin or caffeine?

science
A man walk 3km East and 4km North what is his resultant displacement? Suppose he walks 3km and 4km 60 degree North of East. What is the displacement?

Science
Two trains are traveling towards each other, starting 100 kilometers apart. One train travels at 40 kilometers per hour while the other travels at 60 kilometers per hour. The plane starts flying at 90 kilometers per hour, starting from the location of the faster train. Once ...

Science
A student adds 5 g each of sand, sugar, and salt to 50mL of water. Did he make a solution? Explain.

Science
Identify the benefits that your space mission might provide for modern society. Explore the possibility of connecting your space mission with satellites that are already gathering information as they orbit Earth. i neeeeeeeeed help plzzzzzzzzzzz!!!!!!!!!!!!!!!!!!!!!

science
Where are the major zones of volcanism? Thanks!

science
parasitic worm infestation is hypothesized to be damaging to the host. However scientists have recently discovered that worm infestation of certain autoimmune disorders. in which of the following ways should the hypothesized to be modified , given the new findings A. worm ...

Science
For an organism that has a diploid number of chromosomes of 12, give the number of chromosome/chromatid copies at the end of the following cell-cycle phases: a) G2 phase b) Meiosis I metaphase c) Meiosis II telophase

Chemistry
a group of grade three students, along with their science teacher, were outside the classroom observing plant species. upon observation, the students recognized that some plant leaves were very pale yellow and weak looking while some looked healthy. suggest an appropriate ...

science
DNA is synthesized during which of the following stages of the cell cycle? Choose all that apply A.mitosis B.G2 C.S D.G1 E.interphase F. cytokineses I answered with A,C,E am I missing one? I am pretty sure I am

Post a New Question