Thursday
December 8, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

Science
Which climate is warm, wet, and located on the edges of the tropics? Temperate marine. Highlands. Temperate continental. (MY ANSWER) Polar.
Thursday, February 4, 2016 by LOVE

science
a brick falls off scaffold at height of 80 m above the ground it velocity AfTeR FalLInG for 2 s Is 19;6 what iS IT MAgnitudE WheN IT HITS The GRound?
Thursday, February 4, 2016 by Saneh

science
The dissociation constant of ethanoic acid (ch3cooh) at 298k is 1.8*10^-5 in a buffer solution the concentration of ch3coo and ch3cooh are 0.05m and 0.1m respectively what is the ph of the buffer solution
Thursday, February 4, 2016 by abiola

science
How strongly gravity pulls on a object is called?
Thursday, February 4, 2016 by sea

science
The graph below shows your speed at different times while riding a bicycle. For how many minutes did your speed remain constant?
Thursday, February 4, 2016 by ?

science
What is the relationship between the major body systems
Thursday, February 4, 2016 by emily

Science
When a balloon filled with any gas and the end is tied. It is left in the air. What changes occur in the volume of the balloon? Give reason.
Thursday, February 4, 2016 by Priyanka

Science
1. How does a mutation in the DNA affect the way proteins are made? A) a mutation in the DNA results in miss happen tRNA molecules ** B) a mutation in the DNA results in a chance in the mRNA, but it does affect the protein C) a mutation in the DNA affects the structure of mRNA...
Wednesday, February 3, 2016 by Anonymous

Science physics
What is the magnitude of average force a pole vaulters exterts on a landing bag if it's 1.5 meters high and deforms by 0.5 M=60kg Height of the bar=4.5m His centre of mass is 1m
Wednesday, February 3, 2016 by Physics help on problem

Math
The science club sold 24 T-shirts last week and 18 T-shirts this week. What is the percentage of decrease in the number of T-shirts sold? A: 33% B: 25% C: 50% D: 75% How do you do this?
Wednesday, February 3, 2016 by Grant

Physical science
Describe how to determine the ideal machanical advantage of each type of simple machine How are the lever and the wheel and axle related?
Wednesday, February 3, 2016 by Angelina

help pleaze with science
Describe the weather in africa
Wednesday, February 3, 2016 by Anonymous

science
what is a phase where chromatin condenses to form chromosomes
Wednesday, February 3, 2016 by Anonymous

science
130cm3 of a gas at 20oc excert a pressure of 750mmhg calculate it's pressure if it's volume is increased to 150cm3 at 35oc
Wednesday, February 3, 2016 by Emmanuel osita

Science
Calculate the expansion work done when 50g of water is electrolysis under constant pressure
Wednesday, February 3, 2016 by Natalia

science
1. In plants, sexual reproduction occurs when sperm and egg unite to form a... a. gamete b. gametophyte c. sporophyte d. zygote Is it d? 2. A plant continues to grow throughout its life through the use of s a process called... a. alternation of generations b. photosynthesis c...
Wednesday, February 3, 2016 by jjiiddss

Forensic science
1.Some people believe that certain drugs such as marijuana should be legalized. Do you agree or disagree? What impact might legalization have on forensic science as a field? for the first one I think that marijuana should not be legalized because people can mistreat the drug. ...
Wednesday, February 3, 2016 by anonymas

science/maths
​a car moves with a speed of 30km/h for 10 minutes and then 50km/h for 20 minutes.what will be the total distance covered by the car for 30 minutes?
Wednesday, February 3, 2016 by aastha

science
Ravi prepared a solution of sodium chloride by mixing 5.85g of salt in 1l of water.Find molar mass of sodium chloride?
Wednesday, February 3, 2016 by rohini

science
why did not expose theaerasolto a high temparature
Wednesday, February 3, 2016 by trish

Science
Julie dissolved 20 g of sugar in a cup of water. The mass of the solution was 500 g. What volume of water did Julie start with?
Wednesday, February 3, 2016 by Anonymous

Science
1) Both carbon dioxide and water are pure substances. How are they similar to each other? A. both substances have a set ratio of atoms that cannot be separated by physical means. B. both substances have a set ratio of atoms that can be separated by physical means. C. both ...
Tuesday, February 2, 2016 by EEE

Science
If an astronaut with a tool belt accidentally pushed off from the shuttle, how could the tools in the belt be used to return the astronaut to the shuttle?
Tuesday, February 2, 2016 by Andrew

science help PLS
Which of the following is a sign of poor quality water? Zero turbidity A pH of 7.0 High phosphate content High dissolved oxygen is it d
Tuesday, February 2, 2016 by Oscar

science help PLS
Which of the following is a sign of poor quality water? Zero turbidity A pH of 7.0 High phosphate content High dissolved oxygen is it d
Tuesday, February 2, 2016 by Oscar

Science
Two forces of 5n and 12n respectively act on the same piun.Show how you would determine the magnitude of the resultant by using the tail to head and tail to tail method and Pythagoras theorem(13n)
Tuesday, February 2, 2016 by Lerato

Science
1. A ___ has a definite shape and a definite volume. (1 point) solid•• liquid gas molecule 2. Why is a gas able to flow? (1 point) Its particles have melted and can move around. Its particles have high viscosity and can move around. Its particles have enough energy ...
Tuesday, February 2, 2016 by Vanessa

science
A boy is standing at the top of the a building, 40 m high. He leans over the side and throws a pebble vertically upwards from the edge of the building at 12m.s^-1. The pebble reaches the ground at the foot of the building. Calculate time for the pebble to reach the ground
Tuesday, February 2, 2016 by Itumeleng

Science
1. what is the momentum of a 20.0 kg scooter traveling at 5.00 m/s? 4.00 kg m/s 20.0 kg m/s 25.0 kg m/s 100 kg m/s 2. Which of the following describes the relationships between friction and inertia? when there is more friction, there is less inertia when there is less friction...
Tuesday, February 2, 2016 by Help Please

NATURAL SCIENCE
CAN YOU PLEASE HELP ME TO DRAW A PYRAMIT TABLE
Tuesday, February 2, 2016 by THATO

Science
A force of 20N act an object angle of 30 to the inclined plane . The object move 8.0m up the unclined plane what is the workdone by the force plz draw.
Tuesday, February 2, 2016 by Ibn isah pd.

Science
the active ingredient in the alergy medication claritin contain carbon,hydrogen,chloride,nitrogen,and oxygen its molecules formula is C22H23ClN2O2.the standard adult gosage utizies 1.572*10^19 molecules of the spicies determine the mass gosage of the active ingridient in the ...
Tuesday, February 2, 2016 by Kriatian ferrer

Science
A flatt horizontal road is been designed for 60km/hr speed limit if the maximun acceleration of the car travelling on the road is to be 15m/s at the above speed limit.what is the minimun radius of the curvature of the curve on the road
Tuesday, February 2, 2016 by Paul

Science (physics)
Before Felix enters the capsule, what can we say about his gravitational potential energy and kinetic energy?
Monday, February 1, 2016 by elle

Science
How does a butt work?
Monday, February 1, 2016 by Fredrick

science
The equilibrium constant for the gas phase reaction N2O4 ⇀↽ 2 NO2 at a certain temperature is K = 0.0466. If the initial concentrations are [N2O4] = 1.0 M, [NO2] = 0.0 M, what are the final concentrations of [N2O4] and [NO2], respectively? 1. 1.0 M ; 0.22 M 2. 0.8 ...
Monday, February 1, 2016 by cora

Science
How do you think a scientist might figure out a person’s identity from bones? My answer I think that depending on the shape and size of the bones are different for every person like you DNA. This is how they know who you are. it is also possible that your bones carry DNA ...
Monday, February 1, 2016 by Anonymous

Physical science
What is the current produced by a 9volt battery flowing through a resistance of 2*10 ohms
Monday, February 1, 2016 by Denise

Science
If a crate with 350N is pulled so that the crate slides at a constant velocity what is the friction force?
Monday, February 1, 2016 by Jane

Science
what is Porn?
Monday, February 1, 2016 by Girl with questions.

Science
A body of mass 8kg moving with a velocity of 10m/s collides with another body of mass 6kg moving in the opposite direction with a velocity of 50m/s.determine their common velocity in the direction of A after collision
Monday, February 1, 2016 by Yunus

MATERIAL SCIENCE
1. Calculate the theoretical density of Barium metal barium 2. Calculate the theoretical densities and packing factor of barium zirconate (BaZrO3), and barium cerate (BaCeO3), both of which form the perovskite structure
Monday, February 1, 2016 by MANFRED

Science
If a spring has a shiffness of 9,50nm-1 what work will be done in exered the spring by 60mm.
Monday, February 1, 2016 by Favour o idris

Science
What is the centripetal acceleration a satellite is orbiting the Earth at an altitude of 300.22 km?
Monday, February 1, 2016 by Jack

physical science
A golfer on a level fairway hits a ball at an angle of 38° to the horizontal that travels 85 yd before striking the ground. He then hits another ball from the same spot with the same speed, but at a different angle. This ball also travels 85 yd. At what angle was the ...
Monday, February 1, 2016 by Brian

science
What is the form of the graph, and what is the approximate distance traveled by the aircraft in 7.5 seconds
Monday, February 1, 2016 by tre

science
If exponential growth occurs in the population of a species of predator, the population of its prey will most likely decrease quickly. increase slowly. stay the same. experience exponential growth.
Monday, February 1, 2016 by sarah

science n4
a bullet is fired vertically upwards wth a initial velocity of 300m/s as it leaves the barrel.the rifle barrel is level with the ground and the rifleman stands in a trench.calculate the velocity of the bullet when it is 200m from ground level during the downward movement.
Monday, February 1, 2016 by nare

Science
Plz correct me if I'm wrong!! 1) Which of the following is a chemical change? (1 point) Boiling of water Melting a cube of ice Dissolving 10 grams of salt in water Splitting water into hydrogen and oxygen*** 2) What is the mass of water that results from combining 2.0g of ...
Monday, February 1, 2016 by Vanessa

science
Atomic no.of an element is 12. what is it valency?
Monday, February 1, 2016 by sakshi

science
A loaf of bread weighs 1,362 g. The weight in kilograms is Select one: a. 1,362 kg. b. 0.01362 kg. c. 0.1362 kg. d. 1.362 kg. Next
Monday, February 1, 2016 by katelyn

science
if more sugar is placed into a glass of iced tea than can dissolve in the te,the additional sugar will sink to the bottom of the iced tea. Which of the following statements best accounts for the observation that an oversupply of sugar crystals will collect on the bottom of the...
Sunday, January 31, 2016 by Flora

science STEM FAIR
Do all liquids evaporate at the same rate ? Liquids 1. Water 2. Nail polish " Remover " 3.Ginger ale
Sunday, January 31, 2016 by Jada .. ( friends call me Jaay / Jay )

science
Can you predict the force needed to stretch the rubber band to 40.0cm?why or why not
Sunday, January 31, 2016 by alicia

earth science
The global ocean covers about 70% of the Earth’s surface. If all the ocean water was uniformly distributed over the whole surface, what would be its depth? Assume that the Earth is a perfect sphere, and the average ocean depth is 4 km.
Sunday, January 31, 2016 by Marisa

SCIENCE HELP PLS
Which of the following is a source of graywater? Sewage water Shower water Water waste from an auto repair garage Water waste from a chemical company is it b
Sunday, January 31, 2016 by Oscar

Science
Describe one observation astronomers use to show that the universe is expanding
Sunday, January 31, 2016 by Sarah

Science
-Explain how and when the universe formed according to the big bang theory? -Explain how and when our solar system formed? -Describe one observation astronomers use to show that the universe is Expanding?
Sunday, January 31, 2016 by Sarah

science
1. The liquid part of the blood is called _____. (1 point) hemoglobin plasma platelets white blood cells 2. Your circulatory system can best be compared to _____. (1 point) gates a net pipes a balloon 3. Which of the following shows the correct order of blood flow? (1 point) ...
Sunday, January 31, 2016 by Anonymous

science
Which of the following describes Joseph Lister’s role in discovery and prevention of disease? (1 point) recognized the relationship between disease and cleanliness discovered that microorganisms cause disease in humans invented pasteurization developed a series of methods...
Sunday, January 31, 2016 by Anonymous

science
how many electrons are in the sodium sulphate?
Sunday, January 31, 2016 by jailos

Science
if a strong odour is smelt continuously for some time the sensation of smell of that substance weakness why?
Sunday, January 31, 2016 by Rabin

science
a body floats with only 30% of its volume out of water.calculate the density of this body.
Sunday, January 31, 2016 by kaunda kapalu

Science
which part of the tongue is stimulated by more temperature? Explain.
Sunday, January 31, 2016 by Rabin

SCIENCE
A MACHINE OF EFFICIENCY 60% IS USED TO RAISE A LOAD OF 150kg THROUGH A VERTICAL DISTANCE OF 2.5m.CALCULATE THE WORK DONE [IN JOULES]. I tried E=WORK OUTUT/WORK INPUT times 100% 60=150 times 10 times 2.5/work input times 100 60 times work input=3750 times 100 work input=375000/...
Sunday, January 31, 2016 by JOY

science
a 50 kg of astronaut ejects 100 g of gas from his propulsion at a velocity of 50 m/s. what is his resulting ?
Sunday, January 31, 2016 by kim allyson

Science
Find the resultant of two displacement vectors A and B, the magnitude of A is 45 meters and the magnitude if B is 25 meters?
Sunday, January 31, 2016 by Vince Jerald

Science
An artificial satellite circles around the earth at the height where the gravitational force is one fourth of that at earth's surface. If the earth's radius is R the height of the satellite above the surface of the earth is?
Sunday, January 31, 2016 by Shubham

Science
Explain how coal is useful in the production of iron and aluminium.
Saturday, January 30, 2016 by Anonymous

science
what is the velocity of a 0.7 kg ball that has a momentum of 1.4 kg m/s
Saturday, January 30, 2016 by kc

science
Which is not part of your immune system's response to a disease-causing organism? vaccination recognition disposal immunity vaccination right
Saturday, January 30, 2016 by Anonymous

Science
Ionic bonds: a. result from the sharing of electrons between atoms. b. form only between polar molecules. c. form between atoms that develop opposite charges. d. result from the natural repulsion that develops between protons. answer is C
Saturday, January 30, 2016 by mandy

Science
As a result of rigorous experimentation Question 7 options: more hypotheses may be developed. more questions may be asked. a new biological concept could emerge. entire theories may be modified or discarded. all of these i suppose
Saturday, January 30, 2016 by mandy

Science
Hypotheses can be rejected or supported by experiments, or, in some instances, new observations. i think it's true
Saturday, January 30, 2016 by Seth

Science
Consider the researcher's experiments on the mysterious die-offs of fish in North Carolina rivers. Which of the following best represents her main hypothesis? Question 8 options: Fish maintained in laboratory environments were dying when exposed to river water. Microscopic...
Saturday, January 30, 2016 by Seth

Science
Organisms designated autotrophs obtain their energy from: other producers. dead consumers. decomposers. inorganic sources. i think it's all of these.
Saturday, January 30, 2016 by Jane

Science
How do astronomers use spectroscope??
Saturday, January 30, 2016 by Tina

Life science,geography ,history and mathematical literacy
Is it possible for me to do Nursing with those subjects?
Saturday, January 30, 2016 by Reazy Beans

pure maths, tourism, religion, life science, life orientation, agriculture
do I fit to study nursing? ?
Saturday, January 30, 2016 by shanique

Science
How does altitude affect climate? The higher the altitude, the colder the climate will be. (MY ANSWER) The lower the altitude, the older the climate will be. The higher the altitude, the hotter the climate will be. Altitude is not related to climate.
Friday, January 29, 2016 by LOVE

Science
Plz correct me if I'm wrong!! Which of the following is a chemical property of aluminum? A.) The melting point of aluminum is 660 degrees C B.) The boiling point of aluminum is 2519 C C.) Aluminum does not dissolve in water D.) Aluminum reacts with oxygen••
Friday, January 29, 2016 by Vanessa

Science
A storm with winds over 120/km/h that can last several weeks is a? A.Tornado B Hurricane C Jet Stream D Thunderstorm I think its hurricane am i right?
Friday, January 29, 2016 by Sam

science(physics)
a car of mass 100kg travering at 36km/h is brought to rest over a distance of 40m.calculate(a)accelaration(b)the average abreaking force
Thursday, January 28, 2016 by luckson

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)Gallbladder I think its C.
Thursday, January 28, 2016 by I need help

Physical Science
At a baseball game a ball of mass m = 0.11 kg moving at a speed v = 22 m/s is caught by a fan. the ball is stopped in 0.014 s , find the average force of the ball on the catcher's hand?
Thursday, January 28, 2016 by Eryn

computer science
The question thus is the military initiated Arpanet, which matured into our Internet through a high social value of its potential, still provide the same social value it initially provided when the web exploded in popularity?
Thursday, January 28, 2016 by kris richey

Computer Science
Create a class called Shapes that has a private int field named radius and the proper get- and set- methods (according to our Java coding standards). Create a constructor that takes an integer as a parameter to initialize the radius. Create a void method called report() that ...
Thursday, January 28, 2016 by Justin

science
what happens to animals when habitats change
Thursday, January 28, 2016 by Anonymous

Science
Plz Correct me!! Table salt has the chemical formula NaCl. Table sugar has the chemical formula C12H22O11. Which of the following is true? (1 point) Both compounds are held together by chemical bonds. Both compounds have the same density. Both compounds react with water. Both ...
Thursday, January 28, 2016 by Vanessa

Science
Plz correct me!! A student combined water, sugar, and salt in a beaker. Which of the following statements is true? (1 point) The individual substances can be separated by physical means. The individual substances cannot be separated by physical means.* A new substance is made ...
Thursday, January 28, 2016 by Vanessa

Science
Table salt has the chemical formula NaCl. Table sugar has the chemical formula C12H22O11. Which of the following is true? (1 point) Both compounds are held together by chemical bonds. Both compounds have the same density. Both compounds react with water. Both compounds contain...
Thursday, January 28, 2016 by Del Rey

Science
Table salt has the chemical formula NaCl. Table sugar has the chemical formula C12H22O11. Which of the following is true? (1 point) Both compounds are held together by chemical bonds. Both compounds have the same density. Both compounds react with water. Both compounds ...
Thursday, January 28, 2016 by Vanessa

Science
Select three words that belong together. To do this pick one word from each of the three sets below: Set 1: Estuary, Lake, Neritic Zone Set 2: High Salt, Intermediate Salt, No Salt Set 3: Trout, coral, oyster Answer choices: A) Neritic zone, intermediate salt, oyster B) Lake, ...
Thursday, January 28, 2016 by Cami

science
a box of 5kg lies on a ramp of inclination 30degrees. Calculate the maximum static friction force needed to keep the box stationary
Thursday, January 28, 2016 by pertunia

Science
Under which conditions are clouds formed from ice crystals? A.strong winds B.high altitude (MY ANSWER) C.low humidity D.high pressure
Thursday, January 28, 2016 by LOVE

Science
Select three words that belong together. To do this pick one word from each of the three sets below: Set 1: Estuary, Lake, Neritic Zone Set 2: High Salt, Intermediate Salt, No Salt Set 3: Trout, coral, oyster Answer choices: A) Neritic zone, intermediate salt, oyster B) Lake, ...
Thursday, January 28, 2016 by Anonymous

Science
Blank is a round pellet of ice larger than 5 millimeters in diameter. Snow. A hailstone. Sleet. (MY ANSWER) An ice crystal.
Thursday, January 28, 2016 by LOVE

Science
Which of the following safety measures should you observe when there is lightning. Stay away from objects made of plastic. Stay away from metals and other objects that conduct electricity. (MY ANSWER) Stay near open windows. Stay on the roof of your house.
Thursday, January 28, 2016 by LOVE

Science
Eli sees a puddle in parking lot after a rainstorm. The next day, the puddle has gotten smaller. Which of the following most likely happened to the water in the puddle? It condensed. It evaporated. (MY ANSWER) It became colder. It transpired.
Thursday, January 28, 2016 by LOVE

Science
Which of the following is a correct description of a tornado? A large swirling low pressure system that forms over that forms over the warm Atlantic ocean. A winter storm with wind speeds of at least 56 km/h and low visibility. A violently rotating column of air in contact ...
Thursday, January 28, 2016 by LOVE

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