Branches of Science
Recent Homework Questions About Science
Post a New Question | Current Questions
science
A golfer tees off and hits a golf ball at a speed of 31 m/s and at an angle of 35 degrees. How far did the ball travel before hitting the ground? Round the answer to the nearest tenth of a meter.
Tuesday, October 9, 2012 at 3:17pm
Science
What is the final pressure of the gas relative to its initial pressure when there is an increase in Kelvin temperature of a cylinder of compressed gas by a factor of 2.7?
Tuesday, October 9, 2012 at 1:39pm
Physical Science
How much heat in joules is needed to raise the temperature of 5.5 L of water from 0 degrees Celsius to 78 degrees Celsius?
Tuesday, October 9, 2012 at 1:27pm
Science
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 15.2 g of biphenyl in 29.5 g of benzene?
Tuesday, October 9, 2012 at 12:52pm
Physical Science
A strong magnet attracts a paper cup to itself with a certain force. Does the paper cup exert a force on the strong magnet?
Tuesday, October 9, 2012 at 11:13am
Science
Predict what would happen to the weather in the north-eastern united states if the polar jet stream dipped to the south. How would the weather change if the jet stream moved to the north?
Tuesday, October 9, 2012 at 8:16am
Bachelor in Science
If I takeB achelor in Science How many years it will take and what field it relates to?
Monday, October 8, 2012 at 6:57pm
science
I dissolved two different white solids into water. One solid dissolved and gave off heat and the other became cold. Reading various texts online, I was not sure if these were physical or chemical changes. Some texts say if these solids are salts then these are physical changes...
Monday, October 8, 2012 at 5:33pm
science
A truck whose bed is 2.5m long, 1.5m wide,and 1m high delivering sand fro a sand-sculpture competition. How many trips must the truck make to deliver 7 cubic meters of sand?
Monday, October 8, 2012 at 4:14pm
science
why do plants cell have rigid cell walls while animals cells dont have
Monday, October 8, 2012 at 8:24am
Science
In black and white photography, a photon energy of about 4.00 x 10 to the negative 19th power I is needed to bring about the changes in the silver compounds used in the film. Explain why a red light used in a darkroom does not affect the film during developing.
Monday, October 8, 2012 at 2:14am
Science
How many minutes are required for a radio signal to travel from Earth to a space station on Mars if Mare is 7.83 x 10 to the 7th power km?
Monday, October 8, 2012 at 2:03am
Science
How much time is required for reflected sunlight to travel from the Moon to Earth if the distance between Earth and the Moon is 3.85 x 10 to the 5th exponent?
Monday, October 8, 2012 at 1:58am
Social science
Social conflict, empowerment theory and feminist theory. How are the theories similar? How are the theories different? What are the implications for interventions and community development?
Sunday, October 7, 2012 at 8:30pm
science-physics
A swimmer, capable of swimming at a speed of 1.97 m/s in still water (i.e., the swimmer can swim with a speed of 1.97 m/s relative to the water), starts to swim directly across a 2.77-km-wide river. However, the current is 1.13 m/s, and it carries the swimmer downstream. (a) ...
Sunday, October 7, 2012 at 5:40pm
science- please check my work.
Aspirin (C9H8O4) is produced from salicylic acid (C7H6O3), and acetic anhydride (C4H6O3): C7H6O3 + C4H6O3 ¨ C9H8O4 + HC2H3O2 How much salicylic acid is required to produce 2.0 102 kg of aspirin, assuming that all of the salicylic acid is converted to aspirin? for ...
Sunday, October 7, 2012 at 3:50pm
Science
Please list breeds of pigs found in the caribbean thank you.
Sunday, October 7, 2012 at 12:48pm
science
Q10 A hunter aims his gun and fires a bullet directly at a monkey. At the instant the bullet is fired, the monkey drops. The minimum speed for the bullet to hit monkey is
Sunday, October 7, 2012 at 12:49am
Social science
Social conflict, empowerment theory and feminist theory. How are the theories similar? How are the theories different? What are the implications for interventions and community development? Thank you, Ms. Sue
Saturday, October 6, 2012 at 11:27pm
science
a star has a size of 0.1 solar radius. How many times larger is the sun than this star
Saturday, October 6, 2012 at 9:50pm
science
what are some physical properties of stars
Saturday, October 6, 2012 at 9:40pm
Social science
What are the implications for interventions and community development?
Saturday, October 6, 2012 at 9:35pm
physical science
An object which is 0.52m tall is located 1.13m in front of a plane mirror. How tall is the image as seen in the mirror?
Saturday, October 6, 2012 at 5:01pm
science
Explain why the temperature of water might increase when a solution forms.
Saturday, October 6, 2012 at 11:54am
science
What happens when you burn magnesium metal using the big idea of energy?
Saturday, October 6, 2012 at 8:53am
science
Hi, create one of the following weather instrument:we would like anemometer.please tell me which one is the best
Friday, October 5, 2012 at 10:57pm
science
determine the period of motion when a ball dropped from a height of 4.40m makes a perfectly elastic collsion with the ground without any mechanical energy lost
Friday, October 5, 2012 at 10:53pm
science
please tell me if you agree with the following: Which Brand of popcorn hs the least amount of unpooped kernels after 3 minutes. Brand 1 has 1 Brand 2 has 15 Brand 3 has 16 Brand 4 has 5 Brand 5 has 25 the answer is Brand 1 BUT is the: independent variable the different brands ...
Friday, October 5, 2012 at 7:29pm
science
what is the control in the following experiment - which brand of popcorn has the least amount of un-popped kernels after 3 minutes?
Friday, October 5, 2012 at 7:18pm
Science-Biology
why do plants grow better under certain lighting conditions than others?
Friday, October 5, 2012 at 5:36pm
Science
How does the inner core differ from the outer core?
Friday, October 5, 2012 at 5:33pm
science
a puppy runs a distance of 20m to its mother ina time 5s.what is the puppy's speed?
Friday, October 5, 2012 at 3:20pm
science
A prisoner that is funny would be what periodic table element?
Friday, October 5, 2012 at 2:38am
Advanced physical science
An astronaut drops a golf ball to the surface of the moon from a height of 1.5m. The golf ball has a velocity of 2.24 m/s right before it lands on the moon (assume this height to be zero). What is acceleration due to gravity on the moon?
Thursday, October 4, 2012 at 11:20pm
Advanced physical science
At the top of the Washington monument, a bird drops an acorn into the reflecting pool 169m below. If the acorn has a massof 1.0 kg, with what velocity would it hit the water?
Thursday, October 4, 2012 at 11:17pm
Advanced physical science
A fiery ball of wood is loaded into a medieval catapult to be thrown into a castle. Unfortunately, the attacking heathens are not very smart and since geometry and physics were not studied in their time, they launched the ball straight up into the air. The catapult launcher ...
Thursday, October 4, 2012 at 11:13pm
Science
An elevator lifts a person weighing 625 newtons a distance of 7 meters. If the elevator uses 875 watts of power to lift the person, how long does it take?
Thursday, October 4, 2012 at 10:28pm
science
for many years pellagra was believed to be an infectious disease promoted by unsanitary conditions. it was common in sanatoriums and orphanages but only among the patients and not the staff. a study of the diets showed that suffers of pellagra rarely ate high quality proteins...
Thursday, October 4, 2012 at 10:27pm
physical science
A Weather balloon carries instruments that measure temperature, pressure, and humidity as it rises through the atmosphere. Suppose such a balloon has a volume of 1.2 m3 at sea level where the pressure is 1 atm and the temperature is 20oC. When the balloon is at an altitude of ...
Thursday, October 4, 2012 at 8:44pm
Science
1. Do you think there is very much practical chemistry in today's world? Can you give any examples? 2. When you use different materials, what are they most likely to be made from: Elements, compounds, or mixtures? Which of the three is most rare. please help... I dont get ...
Thursday, October 4, 2012 at 8:06pm
science
On Earth, the ratio of the force (newtons) to the mass (kilograms) of an object is always the same
Thursday, October 4, 2012 at 6:52pm
Science
How was the process of natural selection helped to produce organisms which possess specific adaptations to help them survive in their environment?
Thursday, October 4, 2012 at 6:36pm
general science
a 210 Newton force is applied to a piston, the force produced is 320 kPa of pressure, what's the area of the piston?
Thursday, October 4, 2012 at 1:49pm
Science
A fire breaks out and increases the Kelvin temperature of a cylinder of compressed gas by a factor of 1.4. What is the final pressure of the gas relative to its initial pressure?
Thursday, October 4, 2012 at 12:50pm
Earth Science
Renewable resources can be replaced as fast as they are consumed? It is true or false?
Thursday, October 4, 2012 at 12:49pm
science
A quantity of steam (200 g) at 126°C is condensed, and the resulting water is frozen into ice at 0°C. How much heat was removed?
Thursday, October 4, 2012 at 12:39pm
science
how has the process of natural selection helped to produce organisms which posses specific adaptions to help them survive in their environment?
Thursday, October 4, 2012 at 12:29pm
science
i have a work sheet to do it gives me the atomic number and the mass number of elements i have to fill in the missing electrons protons neutrons
Thursday, October 4, 2012 at 11:34am
physical science
How do we add forces that act at an angle?
Thursday, October 4, 2012 at 11:20am
world civilization
what was the relationship between politics and science in the early modern world?
Thursday, October 4, 2012 at 8:24am
Computer Science
Where can I find college grants and scholarships for men 2 deviations below standard in height?
Thursday, October 4, 2012 at 3:51am
science
Your airplane just ran out of gas. Your plane is falling at a velocity of 80m/sec down. At that velocity, how long will it take your airplane to reach the ground?
Thursday, October 4, 2012 at 3:40am
Science
What is the molarity of a solution prepared by dissolving 60 gm of Glucose in 500 gm of water
Thursday, October 4, 2012 at 2:23am
Science
(1)Suppose a lava flow was found between two sedimentary rock layers. How could you use the lava flow to learn about the ages of the sedimentary rock layers?
Wednesday, October 3, 2012 at 11:28pm
science
Sediment can be directly turned into which of these types of rock? Select all that apply. A. igneous B. sedimentary C. metamorphic i think its all of them correct?
Wednesday, October 3, 2012 at 10:15pm
science
how does a change in wavelength affect the speed of a photon.
Wednesday, October 3, 2012 at 9:44pm
science
how many days would it take to fly to Jupiter (from Earth) in a space shuttle at 45,000 miles per hour? The minimum distance between the Earth and Jupiter is 365 million miles.
Wednesday, October 3, 2012 at 9:44pm
science
how many days would it take to drive from the earth to the moon at a speed of 75 miles per hour? the average distance from the earth to the moon is 380,000km. 1 km=0.62 miles
Wednesday, October 3, 2012 at 9:42pm
science
What is the relationship between a mineral and a rock? A.They are the exact same thing. B.A mineral is a building block of rocks. C.Minerals are only silicates while rocks are nonsilicates. D.A rock is always man-made while a mineral is naturally occurring. I think the answer...
Wednesday, October 3, 2012 at 8:39pm
Science
What is the basic unit for volume?
Wednesday, October 3, 2012 at 7:07pm
Science
A hockey puck is given an initial speed of 30 m/s on a frozen pond. The puck remains on the ice and slides 130 m before coming to rest. The acceleration of gravity is 9.8 m/s^2 . What is the coefficient of friction between the puck and the ice?
Wednesday, October 3, 2012 at 6:17pm
SCIENCE
CREATE ONE OF THE FOLLOWING WEATHER INSTRUMENTS:THERMOMETER,BAROMETER,ANEMOMETER,WEATHER VANE,OR RAIN GAUGE.
Wednesday, October 3, 2012 at 5:17pm
science/math/physics
A shopper pushes a cart 41 m south down one aisle and then turns 90.0° west and moves 28 m. He then makes another 90.0° turn and moves 14 m. (a) What is the largest possible displacement of the shopper? ____m ___° counterclockwise from west
Wednesday, October 3, 2012 at 4:14pm
Science/Biology
1. Describe a SPECIFIC EXAMPLE of how increased temperature can change cellular processes. 2. What FACTORS (can be properties of animals or the environment) determine how wide a range of temperatures a species can tolerate? Be as comprehensive as you can.
Wednesday, October 3, 2012 at 3:38pm
science
what is external fertilisation
Wednesday, October 3, 2012 at 11:44am
science
in damped oscillation, the amplitude of oscillation is reduced to one fourth of its initial value. 10 cm at the end of 50 oscillations. what will be its amplitude when the oscillator completes 150 oscillations?
Wednesday, October 3, 2012 at 4:02am
Science
What is the difference between overpopulation and Consumption overpopulation? What components would you find in an overall plan for sustuinability?
Wednesday, October 3, 2012 at 12:40am
Science
Environmental Science involves the fields of Science, economics, and politics. Take a current environmental issue, such as the Hurricane Katrina in New Orleans and examine it from the scientific, economics, and political perspective. Which perspective do you think wins out and...
Wednesday, October 3, 2012 at 12:23am
Science
Q16: A clear plastic cube with exactly the same index of refraction as water, is placed in a container of water. Would you be able to see the plastic cube in the water if you looked at it from an angle? Please explain why or why not.
Tuesday, October 2, 2012 at 11:47pm
Physical Science
8 letter word for a substance that can be broken down into two or more simpler substances?
Tuesday, October 2, 2012 at 11:45pm
Science
Q12: A light ray is travelling from a medium with a larger index of refraction to a medium with a smaller index of refraction. Describe what happens as the angle of incidence gets larger and larger. Include the concept of the critical angle in your discussion.
Tuesday, October 2, 2012 at 11:34pm
science
A ship sails 100mi northeast, then 50mi due south. How far is it from the starting point?
Tuesday, October 2, 2012 at 9:07pm
science
make a graphic organizer to show ways how ways to cause physical changes to a piece of paper
Tuesday, October 2, 2012 at 8:43pm
Science
An American Red Cross plane needs to drop emergency supplies to victims of a hurricane in a remote part of the worlds. The plane is traveling horizontally at 100.0m/a at a height of 50.0 above the ground.What horizontal distance does the package travel before striking the ground
Tuesday, October 2, 2012 at 7:33pm
Science 8R - Help!
Describe "Water Displacement". Give an example from everyday life.
Tuesday, October 2, 2012 at 7:00pm
Physical science
I need help on how to set up a formula for 27c and 750 mm hg,a sample of hydrogen occupies 5.00 l how much space will it occupy at stp
Tuesday, October 2, 2012 at 5:29pm
Biology/Science
1. Describe a SPECIFIC EXAMPLE of how increased temperature can change cellular processes. 2. What FACTORS (can be properties of animals or the environment) determine how wide a range of temperatures a species can tolerate? Be as comprehensive as you can.
Tuesday, October 2, 2012 at 4:52pm
science
The earth has a magnetic north and south. How does this help up with evidence to support the theory of Continental Drift?
Tuesday, October 2, 2012 at 3:01pm
science
The brigtness of of the star is determine by distance.Am i correct
Tuesday, October 2, 2012 at 2:47pm
science
How does water temperature give a clue as to what ocean layer the water belongs?
Tuesday, October 2, 2012 at 1:27pm
Science
Can you check my answers for me? The answers I picked have a check mark next to them. Thank you. 1. Darwin’s theory of evolution by means of natural selection proposes that changes happen from generation to generation from ____________ of an organism to the environment. (...
Tuesday, October 2, 2012 at 10:40am
science
A top fuel dragster can accelerate from 0-330mph in the time it takes to go 1000ft. assume that the acceleration is constant. what is the acceleration
Tuesday, October 2, 2012 at 9:17am
science
if two carbon atoms are joined by a triple bond how many other atoms can each carbon atom bond with
Monday, October 1, 2012 at 9:57pm
science
what are the four biogeochemical?
Monday, October 1, 2012 at 8:59pm
7th grade science Ms. Sue
Violent storms generally form along _____. (1 point) occluded fronts cold fronts warm fronts stationary fronts 2. Areas of low pressure usually have _____. (1 point) cloudy weather good weather descending air none of the above These are my answers. Are they correct? 1. cold ...
Monday, October 1, 2012 at 7:32pm
biology
science has limitation because?
Monday, October 1, 2012 at 7:10pm
Science
Calculate the molarity of a solution formed using 55.4 g of AgNO3 in enough water to form 250 ml of solution.
Monday, October 1, 2012 at 7:07pm
science
if two carbon atoms are joined by a triple bond how many other atoms can each carbon atom bond with
Monday, October 1, 2012 at 6:15pm
Science
May you please list some pigs found in the caribbean. Thank you
Monday, October 1, 2012 at 6:11pm
education
6. Which of the following statements about the field of child development is correct? A. It’s devoted to understanding human constancy and change over the lifespan. B. It’s part of a larger, interdisciplinary field known as developmental science. C. It focuses ...
Monday, October 1, 2012 at 5:25pm
Physical science
Why through photosynthesis we mustn't put sodium or potassium hydroxide?? (an experiment for testing the carbon dioxide if it is important for the starch formation)
Monday, October 1, 2012 at 4:27pm
Science
what happens when we apply force below the centre of mass of a cube ? Will it tip?
Monday, October 1, 2012 at 1:55pm
Science
The densities of the Jovian planets are A. not more than about 0.5 times the density of water. B. not more than about 1.5 times the density of water. C. from 3.9 to 5.5 times the density of water. D. more than 5.5 times the density of water. Reset Selection
Monday, October 1, 2012 at 12:39pm
Earth Science
How energy flows through the Earth's system?
Monday, October 1, 2012 at 11:56am
physical science
determine how many millimeters of soft drink in a 2-L bottle and how many are in a sixpack of soda cans.Also express each answer in liters.
Monday, October 1, 2012 at 12:40am
HEALTH
1. Which of the following statements about defensive medicine is true? A. Insurance companies encourage it. B. It's the result of fewer malpractice claims. C. It can mean excessive medical tests. D. It's motivated by the needs of the patient 2. The jury assigns ...
Sunday, September 30, 2012 at 11:23pm
science
how does tea flavor spread from a tea bag throughout a cup of hot water? PLEASE HELP!!!
Sunday, September 30, 2012 at 4:35pm
science (ASAP) PLZ!!
What are some examples of elements, atoms,compounds, mixtures, and molecule. Thank you for helping me on this question
Sunday, September 30, 2012 at 3:33pm
Science
What happens when 1 Liter of Carbon Tetrachloride is poured into a container of Water?
Sunday, September 30, 2012 at 3:13pm
science
What are some exaples of elements, atoms,compunds, mixtures, and molecule. Thank you for helping me on this question.
Sunday, September 30, 2012 at 2:09pm
Earth Science
How energy flows through the Earth's system.
Sunday, September 30, 2012 at 1:11pm
earth science
How do astronomers use satellites?
Sunday, September 30, 2012 at 12:29pm
science
where can carbon and nitrogen be found? i need 5 different areas of both (1 plant and 1 animal)
Sunday, September 30, 2012 at 11:22am
eath science
is moon a source of earth's energy?
Sunday, September 30, 2012 at 11:10am
Science
Natural Uranium contains 15 percent Sm147. Sm147 is radioactive and decays by alpha decay. What will be the number of disintegrations per gram per second of the natural element? The half-life of Sm147 is 1.3x1010 years.
Sunday, September 30, 2012 at 3:51am
Science
Radium has a half-life of 1620 years and decays into radon, which has a half-life of 3.82 days. A 10-gm source of radium is sealed, and the radon produced is pumped off every 24 hours. How many mill curies of radon are pumped off each time?
Sunday, September 30, 2012 at 3:49am
Science
A hydraulic lift office chair has its seat attached to a piston with an area of 11.2 cm2 . The chair is raised by exerting force on another piston, with an area of 4.12 cm2 . If a person sitting on the chair exerts a downward force of 219 N, what force needs to be exerted on ...
Saturday, September 29, 2012 at 5:53pm
science
What force is needed to move a 200.00 neuton chair 1.7 meter?
Saturday, September 29, 2012 at 2:56pm
Earth Science
Two different areas of the United States receive the same amount of rainfall during a day. Area A has soil that contains many large pores and rocks made of sandstone. The soil in Area B is mainly heavy clay. Area A is a desert. Area B is a swamp. For each area (Area A and Area...
Saturday, September 29, 2012 at 12:43pm
Science
A gun fires a shell at an angle of elevation of 30 degrees with a velocity of 2*10^3m/s. What is the horizontal and vertical component of the velocity? What is the range of the shell? how high will the ball rise
Saturday, September 29, 2012 at 8:38am
science
A bullet of mass 50g is fired from a gun of mass 6kg with a velocity of 400m/s. calculate the recoil velocity of the gun?
Saturday, September 29, 2012 at 8:36am
7th grade science Ms. Sue please help if you can
1. Violent storms generally form along _____. (1 point) occluded fronts cold fronts warm fronts stationary fronts 2. Areas of low pressure usually have _____. (1 point) cloudy weather good weather descending air none of the above 5. Tornadoes can form when wind at different ...
Friday, September 28, 2012 at 7:48pm
7th grade science weather
1. Relative humidity is a measure of the amount of _______ that air is holding compared to the amount needed for saturation at a specific temperature. water vapor particles heat none of the above 2. Low, layered gray clouds that produce light precipitation are _____ clouds. ...
Friday, September 28, 2012 at 7:08pm
science
it dorsn't give me a stage in the second stage, some animals just grow larger.Other change in___________
Friday, September 28, 2012 at 6:40pm
science
In the second stage, some animals just grow large. Ohters change in -----------
Friday, September 28, 2012 at 6:17pm
math
65 men 75 women are enfolled in calculus. There are 30 business majors, 40 biology majors, 50 computer science majors, and 20 mathematics majors. No person has a double. If a single calculus student is chosen, find the probability that that the student is not a mathematics major
Friday, September 28, 2012 at 4:44pm
Physical science.
A skydiver who jumps out of a plane that has a forward velocity of 40 m/s. That means that the skydiver has a forward velocity of 40m/s. Ignore the air resistance. The questions: What difference is there between the downward velocities of the skydiver who jumped out of the ...
Friday, September 28, 2012 at 12:15pm
Earth Science
Does energy flows through the Earth's system by heat?
Friday, September 28, 2012 at 11:55am
Earth Science
Can someone five me an example of how carbon cycles through the Earth's system?
Friday, September 28, 2012 at 11:46am
Science
On a winter day the temperature drops from –15°C to –25°C overnight. If a pan sitting outside contains 0.40 kg of ice, how much heat is removed from the ice for this temperature change?
Friday, September 28, 2012 at 11:19am
science
machine fires 5 bullets per sec each of velocity 200m/sec. find power of the gun.
Friday, September 28, 2012 at 11:14am
physical science
explain why elements in a group on the periodic table have similar chemical properties?
Friday, September 28, 2012 at 11:00am
Physics science
Dana and Gina are pushing on a box. Dana pushes with 250 N of force and Gina pushes with 100 N of force. A. What is the net force if tey both push the box in the same direction. B. what is the net force if they push in the opposite directions?
Thursday, September 27, 2012 at 11:40pm
woodlake hills/ science
The car jose is examing has a mass of 25 grams. What is the destiny of the car?
Thursday, September 27, 2012 at 10:19pm
woodlake hills/ science
Jose put 40 mL of water into a graduated cylinder. After addinga toy car, the water level in the cylinder rose to 65mL. What isthe volume of the toy?
Thursday, September 27, 2012 at 10:05pm
Science
if an aluminum cube has a mass of 20g and the length of each side was 2 cm, between what two liquids would it float?
Thursday, September 27, 2012 at 7:30pm
science
How do you tell if intrusion is young or old
Thursday, September 27, 2012 at 6:36pm
science
all cells have smaller parts to keep the cell
Thursday, September 27, 2012 at 6:07pm
Science
What is a tool to separate a liquid from a mixture?
Thursday, September 27, 2012 at 5:44pm
science
if the expiremenal density of something is 2.66 but the true is 2.7 what is the percent error?
Thursday, September 27, 2012 at 5:09pm
science
A small hockey puck slides without friction over the icy hill and lands 6.20 m from the foot of the cliff with no air resistance.What is its initial speed v0 at the bottom of the hill?
Thursday, September 27, 2012 at 2:38pm
marketing
Binomial probability distributions are used in business, science, engineering, and other fields. Suppose you work for a marketing agency and have to create a television ad for Brand A toothpaste. The toothpaste manufacturer claims that 40% of the toothpaste buyers prefer Brand...
Thursday, September 27, 2012 at 1:48pm
science
Why might a seed that falls on the ground in November wait until next April to germinate?
Thursday, September 27, 2012 at 12:26pm
Science
If a mineral is 10g, how much oxygen is in the mineral.
Thursday, September 27, 2012 at 11:13am
science
A bullet of mass 50g is fired from a gun of mass 6kg with a velocity of 400m/s. calculate the recoil velocity of the gun?
Thursday, September 27, 2012 at 8:43am
science
why do exteremely hot particles emit certaion amount of light ?
Thursday, September 27, 2012 at 4:02am
PE
any common activities between PE and science
Thursday, September 27, 2012 at 3:11am
Science
When light passes into the eye, what is it focused by? Is it the cornea and pupil or the retina and cornea? Please help thankss
Wednesday, September 26, 2012 at 11:24pm
Science
If a beam of blue light was shone through a glass prism, you would expect to see A. The beam pass straight through, unaltered B. The beam bent and split into a spectrum of colors C. The beam bent, but continue as a blue beam Or D. The beam absorbed and turned into heat
Wednesday, September 26, 2012 at 11:22pm
Science
True or false: light travels in straight lines if the medium it travels doesn't change
Wednesday, September 26, 2012 at 11:20pm
Physical science
What happens to a ballon as it rises up into the atmosphere? A) increases in volume B) decreases in volume C) the outside atmosphere really makes no differences to the balloons volume
Wednesday, September 26, 2012 at 9:25pm
Physical science
Why does pressure increase as depths increase?
Wednesday, September 26, 2012 at 8:58pm
7th grade Science help
1. _______ is energy that flows from an object with a higher temperature to an object with a lower temperature. (1 point) Heat Radiation Potential Chemical 2. The transfer of energy that occurs when molecules bump into one another is called _____. (1 point) radiation ...
Wednesday, September 26, 2012 at 7:51pm
science
1. Force exerted on an area is called _____. (1 point) pressure temperature gravity mass 2. The composition of the atmosphere is changing due to _____. (1 point) smog ozone depletion increase in CO2 (carbon dioxide) all of the above 3. The _____ is the layer of the atmosphere ...
Wednesday, September 26, 2012 at 7:15pm
science
fill in the blank:the ____, the force acting on an object, the greater the acceleration of the object. It is 6 letters and the third letter is R
Wednesday, September 26, 2012 at 7:15pm
Physical Science
The static frictional between a 500 kilogram box of bricks and the floor is 500 Newton’s. The kinetic frictional force in only 220 Newton’s. How many Newton’s of force must a worker exert to get the moving?
Wednesday, September 26, 2012 at 7:10pm
Science
(1)A geologist was studying rocks in a mountain range. She found a layer of sedimentary rock that had formed in the ocean. Hypothesize how this could happen. My (Answer) Sedimentary rocks forms when sediments have been pressed or cemented together , or when minerals form from ...
Wednesday, September 26, 2012 at 5:30pm
7th Science
the addition of 50 g of salt to a sample of pure water causes its freezing point to be reduced from 0.0 degrees Celsius to -3.15 degrees Celsius. determine how many degrees the freezing point dropped for every 10 g of salt added. Thank ya, randomchik.
Wednesday, September 26, 2012 at 4:12pm
science
use the following terms to create a concept map: ecology,ecosystem,producer,decomposers, carrying capacity,consumers, and food web
Wednesday, September 26, 2012 at 1:34pm
science
a solution that is composed of 5g of salt for every 95g of water produces by what percent concentration of mass?
Wednesday, September 26, 2012 at 10:00am
Pages: <<Prev | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | Next>>
Post a New Question | Current Questions
For Further Reading
