Science

Recent Questions

Science please help
It is important that you maintain a healthy weight both for your overall health and so that your respiratory system can A. deliver oxygen more adequately B. pump blood more forcefully from the heart C. keep capillaries constricted D allow for smaller amounts of air to enter ...

Science
What is a molecule

science
this muscle helps to transport blood to and from the heart A. smooth muscle B. cardiac muscle C. skeletal muscle D. involuntary muscle. Is it D

Science
How do thermometers relate to the kinetic energy of particles of matter? Can someone please help quick I need help and I need the answer to be at least a couple of sentences I have no clue what the answer is but this is only the second question I have posted on here so I'm not...

Anthropology
Ms. Sue, can you please assist me on this? How has globalization affected cultural identities and consumerism? In today’s world the problem of cultural identity shouldn’t be miscalculated. In the world today there are more nation are affected by the phenomenon of ...

Science
A fabric artist creates the elaborate banners that will be carried in battle. What role in the conflict is the artist taking on? A. Supporting the troops B. Documenting history. C. Raising awarenesss of an issue. D. Protesting of an event or circumstance. Is the asnwer D? ...

Science
A blind person walks the neighborhood making loud clicking noises with his tongue. He doesn't use a walking stick nor does he have a seeing-eye-dog. However, he avoids every obstacle and is able to navigate his way around the neighborhood safely. What can be inferred from the ...

Science
Which of the following factors determines the loudness of a sound? A. Frequency of the sound wave. B. Amplitude of the sound wave. C. The temperature of the medium. D. The density of the medium. Is the answer B? Im getting confused betwwen B and D. Thank you

Science- 3rd request plzzz
Which of the following is true about the magnetic field diagram below. Its shows 3 Arrows on top pointing to B A B 3 Arrows on bottom pointing to B A A is the south pole and B is the north pole B A is the north pole and B is the south pole C A and B are repelling each other...

Science
Which of the following is true about the magnetic field diagram below. Its shows 3 Arrows on top pointing to B A B 3 Arrows on bottom pointing to B A A is the south pole and B is the north pole B A is the north pole and B is the south pole C A and B are repelling each other...

Science Help Plz
which of the following statements about earths atmosphere is true? a. earths atmosphere contains 78 percent water vapor which is essential to life b. earhts atmoshpere contains 21 percent oxygen c. earths atmosphere contains carbon dioxide which all life forms require d. ...

Science
Which most resembles a scientific model? A) computer keyboard B) computer hardware C) computer game D) computer mouse

Science
Which of the following is true about the magnetic field diagram below. Its shows 3 Arrows on top pointing to B A B 3 Arrows on bottom pointing to B A A is the south pole and B is the north pole B A is the north pole and B is the south pole C A and B are repelling each other...

physical science
when a 65 kg skydiver jumps from a plane, and her kinetic energy is 7.05*10 to the 5th power J how fast is she falling

Science
An echo occurs when a sound wave bounces off a smooth surface and travels back in the same direction it came. This is an example of A. Reflection. B. Refraction. C. Scatter. D. Absorption. Is the answer A? Thanks

Science
Which of the following affects the speed of sound? A. The amplitude of the wave. B. The frequency of the wave. C. The phase of the medium. D. The wavelength. Is the answer A? Thank you

science(sound#4)
What instrument has a low pitch?

science(waves)
What do waves transfer?

science(sound #3)
Space has no air, what is another name for no air?

science
1. The sporophyte generation produces spores that grow into a(n) (1 point) gametophyte. gymnosperm. angiosperm. pupa. 2. Placental mammals develop (1 point) in an egg laid in water. in a pouch on the mother’s body. inside the mother’s body. inside an amniotic egg. 3. ...

science (sound #2)
What temperature makes sound travel slower?

science (sound)
what temperature makes sound travel faster?

science (aka sound)
What are the 3 things that a medium can be in sound?

Physical Science
Calcium Carbonate combines with Hydrochloric acid to produce Calcium chloride and water and carbon dioxide. I have the skeletal equation of _Ca(CO3)+_HCl>_CaCl2+_H2O+_CO2 is that equation right? if so, how to I balance it?

science
What are the 3 things that a medium can be?

Math
47. For science class, Kyle needs to make a dilute solution of 12 ounces that is 30% vinegar. But he only has 20% vinegar 60^ vinegar. How many ounces of 20% vinegar should he use? A. 3 ounces B. 6 ounces C. 9 ounces D. 10 ounces

Science
Which of the following affects the speed of sound? A. The amplitude of the wave. B. The frequency of the wave. C. The phase of the medium. D. The wavelength. Is the answer D? Thank you

Science
Which of the following factors determines the loudness of a sound? A. Frequency of the sound wave. B. Amplitude of the sound wave. C. The temperature of the medium. D. The density of the medium. Is the answer d? Thank you

science
What are the transporters of protein in plants?

Science
In which of the following situations is a sound wave most likely to travel through air? A. An alarm clock rings in a vaccum. B. A giant star explodes. C. A grasshopper eats a leaf. D. An astronaut uses tools in space. Is the answer A? Thank you.

science
1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 ...

science
A box with a weight of 100N rests on l horizontal floor .

science
A ball sitting on the top of a table has potential energy but no kinetic energy. How do potential and kinetic energy change as the ball falls off the table to the floor? A. Its potential energy increases, and its kinetic energy decreases. B. Its potential energy decreases, and...

physical science
A 0.5 kg block initially at rest on a frictionless, horizontal surface is acted upon by a force of 5.0 N for a distance of 4.0 m. How much kinetic energy does the block gain? What is its final velocity?

science
Calculate the ph of a buffer solution containing 0.2M NH4OH and 0.25M NH4Cl kb=1.8×10

science
Paul threw a paper plane towards the west. The wind however caused the plane to move in a southwestern direction Which statement best describes the direction of the wind? (A) The wind is blowing f r o m the east. (B )The wind is blowing f r o m the west. (C) The w ind is ...

physical science
A car drivers at 5 km/hr, consumes one liter of petrol per 50km. The RPM is 50. How many mintues will the car drive on one litre of petrol. Kindly supply formula and answer.

Math
A survey of 59 customers was taken at a bookstore regarding the types of books purchased. The survey found 36 customers purchased mysteries, 28 purchased science fiction, 21 purchased romance novels, 15 purchased mysteries and science fiction, 12 purchased mysteries and ...

Science
I need an acrostic poem for Balanced Forces and Unbalanced Forces!

Physical Science
A rock is dropped off a 20m tall cliff. How long does it take to get to the bottom of the cliff? What is the instantaneous velocity right before it hits the bottom of the cliff?

Science
Q1. Why is the shape of the nerves important in the nervous system? Q2. Which structure is more complex, a tissue or an organ? How do you know?

Science
Which statement is true of an organ system? A. It supports all part of the organism. B. it is not necessary for the survival of the organism. C. One organ system can take over for another organ system. D. It has no connection with other organ system in the same organism.

science
Which explains how the greenhouse effect and greenhouse gases can affect global temperatures? A. The more greenhouse gases that are in the atmosphere, the more heat will be trapped, thereby increasing global temperatures. B. The more greenhouse gases that are in the atmosphere...

Science
Getting Oxygen 1) Name the components of the respiratory system in the order incoming air would encounter them during breathing. :Trachea,pharynx,larynx,alveoli,bronchi.​ :Bronchi,larynx,alveoli,trachea,pharynx.​ :Larynx,trachea,bronchi,pharynx,alveoli.​ :...

Science
A particular ecosystem in Georgia can support a maximum population of 100 bluebirds which of the following would allow hundred 20 bluebirds to live together in this ecosystem? (a. Human activity disrupting the nesting out of a predator hawk) (B. Flooding that decreases the ...

science
A solution is prepared by mixing 90 ml of 5 M HCl and 30 ml of 8 M HNO3. Water is then added until the final volume is 1 L. Calculate the [H+], [OH-], and the pH for this solution.

science
the change in velocity takes place in 10 sec interval. What is the magnitude, the algebraic sign and the direction of the average acceleration in each interval? At the beginning of the interval a body is moving to the right along the x-axis at 5 ft/sec, and at the end of the ...

concept development
A basic rule in evaluating learning activities is to be sure A. the child has no prior knowledge. B. a variety of science process skills are used. C. the strategies are limited. D. the textbook provides step-by-step photos. my answer is b.

science/ velocity
a body moves along a straight line,its distance from the origin at any instant being given by the equation x= 8t -3t squared, where x is in centimeter and t is in seconds. find the average velocity of the body in the interval from t=0 to t=1 sec,and in the interval from t=0 to...

science
what is an example of fundamental quantity between viscosity,tension,force,weight or non of the above

science
a car travels first one third with speed of 10km/hr,next one third distance with 20km/hr.What is the average of car for whole journey

Science
An elastic cord of elastic constant k and length L is hung from point A having a massless block at the other end. A smooth ring of mass M falls from point A. What is the maximum elongation of cord?

Science
Ball A Momentum Before collision is 3 kg m/s. Ball B Momentum Before Collision is 2 kg m/s. Total Momentum of Both Balls After Collision is 6 kg m/s Ball A and Ball B are rolled so that they will collide. Does the data in the table above demonstrate the law of conservation of ...

science
In an experiment to determine the speed of sound, two observers, A and B, were stationed 5.0 km apart. Each was equipped with a gun and a stopwatch. Observer A heard the report of B's gun 15.5 s after seeing it's flash. Later, A fired his gun and B heard the report 14.5 s ...

Science
In electromagnetic waves, frequency is inversely proportional to A. Amplitude. B. Wave speed. C. Wavelength. D. ReflectioN. Is the answer C? Thank you

Science
When a wave enters a new medium, slows down, and bends, the wave undergoes A. Reflection. B. Absorption C. Refraction D. Reduction Is the answer C? Thank you

Statistics
Anger and Snap Judgments Read the article entitled “Anger Can Cause Snap Judgments” and answer the following questions. ANGER CAN CAUSE SNAP JUDGMENTS Anger can make a normally unbiased person act with prejudice, according to a forthcoming study in the journal ...

Science
What is the differnce between the way matter responds to a transverse wave and a longitudinal wave? A. Matter moves in the same direction in a longitudinal wave, and at right angles to the direction of a transverse wave. B. Matter moves at right angles to the direction of ...

science
What effects or potential effects do technologically based communication modalities between patients and health carer providers and between health care providers only have on health care cost

Accelerated Science
Match each situation with the correct method of heat transfer: a. radiation b. conduction c. convection __A_ 1) The inside of a car gets very hot when that car is parked on a parking lot in the middle of August. __A_ 2) During the winter when the furnace is running in a two-...

science
if you light a candle and put it an open jar then close the top on it, wont the candles light go out?

science
A girl drops a stone into a mineshaft 122.5m deep. how soon after she throws does she here the striking of the stone at the bottom of the shaft?

science
A girl drops a stone into a mine shaft 122.5m deep. How soon after she drops it does she here the sound of it striking the bottom of the shaft?

Science fair project
Hey, can anyone tell me what is the controlled and manipulative variable of a Non- Newtonian fluid/flow please?????????? Extra thanks to the ones who answer:):):):)

Science fair project
Please help me, i think i have nothing left to do except cry!!! My science fair class presentation is tomorrow but i am not even done, i just started!!!! My parents are upset with me, and i think i will get a F in my report card for science this term, my worst! PLEASE TELL ME ...

Science - 7th grade
Can you check the following: 1. Draw a Punnett Square to show a dog breeder inbreeding to maintain a purebred line of golden retrievers. Ans: would the parental cross look like Gg x GG or GG x GG? 2. Draw a Punnett Square to show a farmer crossing a plant that produces a large...

science
How did/does Galileo's work impact or contribute to our lives today?

physical science
How high is a building when an anvil takes 4 seconds to hit the ground? How long will it take a piano to hit the ground when dropped off a building 103 meters high?

Computer Science
"write a program that asks the user to enter the price of an item and rate of discount. If discount is 9%, display the final cost of item" What message do I display if its not 9%? Algorithms btw

science
a ball is dropped fron a building which is 50 metres high.calculate the ball's velocity just before it hits the ground.ignore air resistance

Earth Science
18.   Which of the following is a factor that determines the composition of magma?  A. Texture B. Elasticity C. Color D. Viscosity  D or B?

Earth Science
16.   What type of instrument measures seismic waves?  A. Mercalli scale B. Seismic scale C. Seismogram D. Seismometer D?

Earth Science
15.   _______ currents assist in the transfer of thermal energy from warmer climates to cooler climates.  A. Platonic B. Plutonium C. Convection D. Tectonic C? Please explain

Science
Science To determine the acceleration of an object moving in a straight line, you must calculate the change in its stored during each unit of A. Velocity. B. Time. C. Motion. ******* D. Deceleration Please help

Earth Science
12.   The original location of an earthquake is also known as the  A. horizon. B. epicenter. C. hotspot. D. magnitude. B?

Earth Science
11.   Which earthquake scale takes into consideration the damage caused by an earthquake?  A. Amplitude scale B. Moment magnitude scale C. Richter scale D. Modified Mercalli scale D?

Science - Urgent.
What is a electrostatic lifting apparatus? Please help..

science
what is an electrostatic precipitator? In simple words please..

Science
What is the primary reason for the trend in atomic radius going from left to right across the periodic table? 1.All atoms in a given period of the table are the same size because the same main energy level is being filled. 2.There is no clear trend, the atoms all have ...

Science
The Body's Transport System 1) Which of the following is not a function of the circulatory system? :Breaks down large molecules*** :Delivers oxygen to body cells :Takes carbon dioxide away from body cells :Fights infection 2) Which of the following explains why the heart is ...

Science
1.The Bohr model of the hydrogen atom is best described as: 1. A large lump of chocolate chip cookie dough with electrons as the chocolate chips; those of higher energy are on the outside surface of the lump 2. Similar to Saturn with electrons of varying energies in a single ...

Earth Science
5.   Most tornadoes carry wind speeds that range from  A. 105 to 177 km per hour. B. 178 to 266 km per hour. C. 267 to 322 km per hour. D. 1 to 105 km per hour. A?

Science
Endocrine glands ________. A. Do not have ducts to carry their product to a surface B. Do not have ducts to retain their product below surface C. Have ducts that carry their secretory product to a surface D. Have ducts to retain their secretory product below surface

Science
What hormone is the adrenal medulla responsible for secreting?

Science
1.Infrared radiation has wavelengths ranging from about 800 nm to 1 mm. What is the frequency of radiation of wavelength 970 nm? Answer in units of s−1 . 2.Microwaves, such as those used for radar and to heat food in a microwave oven, have wavelengths greater than about ...

Earth Science
Could I have some help with the question down below?

Earth Science
18.   How many chemical reactions are possible regarding the formation of carbonic acid and the dissolving of calcite?  A. 23 B. 10 C. 2 D. 3 I am stuck on this I looked in my text book and it shows the words but not the number answers!

science
The flowerpot weighs 5 pounds on Earth and 0.29 pounds on Pluto. Which proportion could you use to calculate a 115-pound person’s weight on Pluto? A. 5 over 0.29 = 115 over w B. 0.29 over 5 = w over 115 C. 5 over 0.29 = w over 115 D. either A or B

science
The same astronaut visited Pluto. His weight on Earth was still 170 pounds, and his weight on Pluto was only 10 pounds. He removed an ice core with a weight of 25 pounds on Pluto. What is the weight of the ice core on Earth? A. 1.5 pounds B. 15 pounds C. 42.5 pounds D. 425 pounds

science
An astronaut who weighed 170 pounds on Earth found that his weight on Jupiter was 400 pounds. He captured an alien that weighed 120 pounds on Jupiter. What is the alien's weight on Earth? A. 34 pounds B. 51 pounds C. 78 pounds D. 283 pounds

Science
What is the first activity of the digestive system?

Science
In humans having dimples is a dominant trait. in order for a child to have dimples...? I don't know D: xD

Science
ranging minerals from the hardest to the softest. Chalk, fingernail. steel screw and paper clip

Science
How does the sporophyte generation of a plant differ from the gametophyte generation? Use the words spores, sperm cells, and egg cells in your answer.

Science
Which of the following is true about diabetes? A. The pancreas overproduced glucose, and so insulin must be injected to reduce glucose levels. B. The pancreas underproduced glucose, and so insulin must be injected to increase glucose levels C. The pancreas overproduced insulin...

Science
describe how mutation might might have influenced the development of different species of finches that darwin observed on the galapagos islands

Science
What is the pattern with these fractions 1/4 1/9 1/16 1/25

Science
How would a woman at an airport staring out of a window at an airplane know that the plane she is watching was moving? A. She could use the plane as a reference point. B. She could use the building behind the plane as a reference point. C. She could use the clouds in the sky ...

Science
Which of the following is true about diabetes? A. The pancreas overproduced glucose, and so insulin must be injected to reduce glucose levels. B. The pancreas underproduced glucose, and so insulin must be injected to increase glucose levels C. The pancreas overproduced insulin...

science
Describe the preparation of 100 mL of 6.0 M HCL from a concentrated solution that has a specific gravity of 1.18 and is 37% (w/w) HCL

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