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July 30, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

vcu
Subject: physical science, question: The density of water is p=1g/cm3. What is the mass of 2mL of water?
Monday, November 9, 2015 by Debbie

Science
For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, explain how this result occurs a) after removing the flask from the water bath, the experimenter cools the flask to room temperature...
Sunday, November 8, 2015 by S

math, science
An atomic force microscope cantilever, of rectangular cross section, has a length, l, of 200μm, a width, b, of 20μm and a depth, h, of 1μm. It is made of silicon nitride, which has a Young's modulus, E, of 300GPa. What is the maximum force that can be ...
Sunday, November 8, 2015 by HELP

Science
Can someone please help me with this problem? A 200-1b block rests on a horizontal plane. Find the magnitude of the force P required to give the block an acceleration of 10 ft/s2 to the right. The coefficient of friction between the block and the plane is 0.25.
Sunday, November 8, 2015 by Latoya

liberty college
I am in grade 12 and I have taken History, matches literacy, English language/ literacy,life science, business studies and economics, what course will these subjects allow me take in university? Regards Rita.
Sunday, November 8, 2015 by Rita Petlane

Math Word Problem
A teacher from Anderson Middle School printed k nametags in preparation for the science fair. Half of the nametags were given out to students and 100 nametags were given out to parents. Three-fifths of the remaining nametags were given out to teachers and contests judges. How ...
Sunday, November 8, 2015 by Why?

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...
Saturday, November 7, 2015 by Lea

Science
How did the discovery of the electron change the atomic model? A.It disapproved the earlier idea of an invisible atom. B. It confirmed that atoms are very tiny C. it exposed fraudulent conducted by unqualified scientist D. It proved that atoms are easier to see than once ...
Saturday, November 7, 2015 by Lea

Science
How can you describe the location of magnesium (Mg, atomic number 12) periodic table? A. nonmetal B. metalloid C. group2, period3 D. group3, period 2 @Ms.Sue My answer is C. Can you check my answer Thank you
Saturday, November 7, 2015 by Ava

general physics question
Whenever I read my science textbooks, they always say that "electrons were fired" or "stream of electrons were fired to the target" during an experiment my question is, how to they generate a stream of electrons to fire in a line?? sorry if this is a dumb ...
Saturday, November 7, 2015 by Anonymous

Science
Which process of the carbon cycle is responsible for the release of carbon at the power plant, as shown by the arrow? A. combustion B. photosynthesis C. digestion D. decomposition @Ms.Sue can you check my answer I think the answer is A.
Saturday, November 7, 2015 by Ava

science-chemistry
The free energy generated by ion movement in the cell is used by the cell to do work. Compute the minimum number of millimoles of sodium that would be needed to pump one millimole of calcium ions if the following concentrations were present in the cell. Assume the temperature ...
Saturday, November 7, 2015 by rashi

science
Gf of H2CO3 = -616.1 KJ/mol Gf of H20 = -237.1 KJ/mol Gf of CO2 = - 394.4 KJ/mol 3. A. Carbon dioxide dissolves in water to form carbonic acid. Estimate the thermodynamic equilibrium constant for this reaction using the ΔGf° values shown here. B. Carbonic acid then ...
Saturday, November 7, 2015 by rashi

science-chemistry
The Ksp of mercury(II) hydroxide, Hg(OH)2, is 3.60 × 10-26. Calculate the solubility of this compound in g/L. Gf of H2CO3 = -616.1 KJ/mol Gf of H20 = -237.1 KJ/mol Gf of CO2 = - 394.4 KJ/mol 3.
Saturday, November 7, 2015 by rashi

science
Calculate net force when mass =2000kg, uniform velocity =60kg/hr
Saturday, November 7, 2015 by karan

Physical science 9
why is the SI unit of acceleration is m/s2
Friday, November 6, 2015 by Anamarie

science
What best accounts for the retreating of a waterfall? Only one answer is right 1) meandering stream action 2) erosion of the stream bed Is it number 1?
Friday, November 6, 2015 by john5

science
Briefly explain why potassium chloride readily disolves in water? Include a sketch of the water molecule Showing its polarity.
Friday, November 6, 2015 by freedom

science
If you pour 40g of refrigerated milk (at 4 degrees C) into 200g of freshly percolated coffee (at 96 degrees C), what would the final temperature of your coffee be? Milk has a specific heat capacity of s=3.93J/g degrees C. Coffee has a specific heat capacity of s=4.18J/g ...
Friday, November 6, 2015 by freedom

Science
Multiple Choice 1. Which of the following terms refers to an object that orbits the sun and has enough gravity to be spherical but has not cleared the area of its orbit? (1 point) comet asteroid dwarf planet planet 2. Which of the following statements about the solar system&#...
Friday, November 6, 2015 by Cami

SCIENCE HELP
How will the spacecraft for this mission be designed? What parts are for overcoming the challenging conditions? What parts are for collecting data? What are other parts of the design? I planned to go to mercury- what do I put:(((
Thursday, November 5, 2015 by Areana

Science
what are some tools used to collect data in space?
Thursday, November 5, 2015 by Cami

science
International efforts are being made to safeguard against the misuse of weather modification. An example of the potential to "misuse" the weather is 2)creating droughts or floods for military purposes 4)modifying jungle environments to accommodate transportation needs
Thursday, November 5, 2015 by john5

science
What best accounts for the retreating of a waterfall? Only one answer is right 1) meandering stream action 2) erosion of the stream bed
Thursday, November 5, 2015 by john5

Science/Math
If the air temperature is 30 degrees C and the relative humidity is 60%, will the dew point be reached if the temperature drops to 25 degrees C? I know that the formula is x = .60(37g/m cubed.)
Thursday, November 5, 2015 by Zoe

Science - Mercury
So I'm in the middle of working on a science portfolio and it says: How will you overcome these challenges with the design of your spacecraft? you see I'm planning my own mission to space and I'm traveling to mercury, but I don't know how my spacecraft should ...
Thursday, November 5, 2015 by Areana

Science-Please Help!!!
Which of the following systems is not directly involved in the body's regulation of water. a. digestive b. muscular c. urinary d. integumentary
Thursday, November 5, 2015 by Sammy

science
What best accounts for the retreating of a waterfall? 1) meandering stream action 2) erosion of the stream bed
Thursday, November 5, 2015 by john5

Science
Chemicals used to kill bacteria on living things are. Saprophytes Antiseptics or Postulates
Thursday, November 5, 2015 by Ogunti

Science
True/false does Venus spin counter clockwise? Answer:_______;)
Thursday, November 5, 2015 by Elijah

science
will the air above a surface that has a high albedo be warmer or cooler than the air above a surface that has a low albedo? Low.
Thursday, November 5, 2015 by Megan

Physical science
A 1.2 kg metal head of a geology hammer strikes a solid rock with a speed of 5.7 m/s. Assuming all the energy is retained by the hammer head, how much will it's temperature increase? C= .11 kcal/kgC I already set up the problem. But I keep getting the wrong answer. I have...
Thursday, November 5, 2015 by Tayler

earth science
briefly explain how earths atmosphere heated? Energy is transferred between the earth's surface and the atmosphere via conduction, convection, and radiation. Conduction is the process by which heat energy is transmitted through contact with neighboring molecules
Thursday, November 5, 2015 by Megan

Science Ms. Sue Please
1. The human endocrine system is made up of which of the following structures? (1 point) vessels receptors glands * chambers 2. Which of the following best describes the function of the endocrine system? (1 point) It secretes chemical messengers that travel through the blood ...
Thursday, November 5, 2015 by Maria

Science
1. The human endocrine system is made up of which of the following structures? (1 point) vessels receptors glands * chambers 2. Which of the following best describes the function of the endocrine system? (1 point) It secretes chemical messengers that travel through the blood ...
Thursday, November 5, 2015 by Maria

SCIENCE
NEAR POINT OF A HYPERMETROPIC EYE IS Im.WHAT IS NATURE AND POWER IF LENS? ANSWER IS 3 D.MY ANSWER IS 5D
Thursday, November 5, 2015 by SHOBHIT SWAMI

science
Earth titled axis affects the strength of sunlight in different places of earth's surface. If you are in an area that receiving less direct sunlight,where are you located? a) near the equator b) near the north pole c) near the south pole d) near the north or south pole*** ...
Thursday, November 5, 2015 by Ana

science
erosion and weathering are examples of which types of forces? A constructive forces B destructive forces***** C gravitational forces D inertia-related forces please check my answer
Thursday, November 5, 2015 by Ana

Science Help 1 question
Which of the following is most likely an example of predator adaption? A. Warning Coloration B. Keen eyesight C. Thick body armor D. Spines My answer is Warning Coloration
Thursday, November 5, 2015 by regan

science
if moon goes away, what would happen to the earth? if you drop a ball 3 meters and it bounds 1/2 seconds, what would happen on the moon?
Wednesday, November 4, 2015 by jan weeks

science
if a ball falls 3 meter and bounds 1/2 seconds on the earth, what would happen on the moon if the same happened?
Wednesday, November 4, 2015 by jan weeks

Science and Outerspace
Just out of curiosity, If some one were to take a journey to Jupiter, what do you think would be the social benefits?
Wednesday, November 4, 2015 by Cami

Science
Which piece of children’s’ playground equipment could be used to model and explain the movement of matter in the biosphere? (1 point) slide merry-go-round*** swing seesaw
Wednesday, November 4, 2015 by Labbayk

science
a target t lies flat on the ground 3m from the side of a building that is 10m tall, as shown above. a student rolls a ball off the horizontal speed with which the ball must leave the roof if it is to strike the target moest nearly?
Wednesday, November 4, 2015 by maya

Science - N Cycle Management
Consider a heavily grazed pasture of fescue grass mixed with clover (clover is a legume) on a spring day. Assume it has not rained for several days and the soil has drained below field capacity. (Remember that cattle not only consume grass, but also destroy some by walking on ...
Wednesday, November 4, 2015 by Adam

Science - N Cycle Management
Consider a corn field in the spring at the end of April. The field has been heavily tilled in the fall and all residues have been incorporated in the soil, and are decomposed by this time. Chemical fertilizer (an inorganic fertilizer with only nitrate nitrogen - NO3) has been ...
Wednesday, November 4, 2015 by Adam

science
what is the density of an object with a mass of 60g and a volume of 2cm cubed
Wednesday, November 4, 2015 by Kalyn

Science
An object has more momentum if it has which of the following? a. a large mass and low velocity b. a high velocity and a small mass <- c. A high velocity and a large mass d. a low velocity and small mass
Wednesday, November 4, 2015 by HELP!! URGENT!!

Science
a horse runs with an initial velocity of 11m/s and slows to 5.2 m/s over a time interval of 3.1 s what is the horse's average acceleration
Wednesday, November 4, 2015 by anonymous

Science
How are the processes of natural selection and artificial selection similar? How are they different? (Make sure to include 2 similarities and 2 differences, along with an explanation for each)
Wednesday, November 4, 2015 by Alexia Smith

Science
On a topographic map, five contour lines are very close together. The contour interval is 100ft. How high is this feature? Answer: 400ft
Wednesday, November 4, 2015 by Sue

Science
State how comparing the amino acid sequence of a protein can provide evident that evolution has taken place. A: If evolution has taken place, then, in general, species descended from a recent common ancestor should have fewer amino acid differences between their proteins than ...
Wednesday, November 4, 2015 by Victoria

Social Studies
1) How did eugenics reinforce nativist ideals? A: Eugenics fueled the nativists' argument for the superiority of the "original" American stock--white Protestants of northern European descent. 2) What political, social, and economic contributions did women make to...
Wednesday, November 4, 2015 by Victoria

science
what are some family characteristics for Halogens
Wednesday, November 4, 2015 by heather

Science help
The length of a football field is 100 yards. When you compare geologic time (4.6 billion years) to the length of a football field, you will find that each yard on the field will equal 46 million years, and each 10-yard section will equal 460 million years. Use this information...
Wednesday, November 4, 2015 by Aria

SCIENCE
.) Iodine 131 is a radioactive waste product generated in nuclear power plants. It has a half life of 8 days. If 16 grams was released from the Fukushima power plant 32 days ago, how much is left now?
Wednesday, November 4, 2015 by BOB

science
the man walks 20 steps forward from point A to point B and moves 5 more steps to C
Wednesday, November 4, 2015 by melojen

Science
which of the following skulls is most likely that of an herbivore?
Wednesday, November 4, 2015 by YRN DJ

Gentry science
What in nature could you find a source of the same energy that that provided batteries
Tuesday, November 3, 2015 by Anawahe

Science
2 racing cars of masses m1 and m2 are moving in circles of radii r1 and r2 respectively. Their speeds are such that each makes a complete circle in same time t. The ratio of Angular speed of the first car to the second car is?
Tuesday, November 3, 2015 by ABC

Science
a tank 2m high is half filled with water and then filled to the top with oil of density 0.8 g/cc . what is the pressure at the bottom of the tank? g= 10m/s2
Tuesday, November 3, 2015 by ABC

U.S. History Answer Check (Ms. Sue)
1) How did eugenics reinforce nativist ideals? A: Eugenics fueled the nativists' argument for the superiority of the "original" American stock--white Protestants of northern European descent. 2) What political, social, and economic contributions did women make to...
Tuesday, November 3, 2015 by Victoria

Science <3
Why do humans laugh?
Tuesday, November 3, 2015 by curious

Science
I do understand what the terms balanced energy and the term unbalanced energy mean when it relates to science. Please help me understand.
Tuesday, November 3, 2015 by Patrick

SCIENCE
what is the difference between a continental plate and an ocean plate?
Tuesday, November 3, 2015 by sue

SCIENCE
WHAT IS BELIEVEED TO CAUSE PLATE TECTONICS MOVE?
Tuesday, November 3, 2015 by JANETTE

science
Water is useful for reducing friction between objects. However you also learned that (due to friction) moving water causes rough rocks to become smooth. How can this be?
Tuesday, November 3, 2015 by Caitlin

U.S. History
1) How did eugenics reinforce nativist ideals? A: Eugenics fueled the nativists' argument for the superiority of the "original" American stock--white Protestants of northern European descent. 2) What political, social, and economic contributions did women make to...
Tuesday, November 3, 2015 by Victoria

natural science
usingbisection method and fp,evaluat the solution set of x3-4x-9
Tuesday, November 3, 2015 by ayele

science
If 0.188 moles of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate would be produced in the following reaction?
Tuesday, November 3, 2015 by Anonymous

science
If 0.188 moles of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate would be produced in the following reaction?
Tuesday, November 3, 2015 by Anonymous

Science for connections academy HELP!
Tony's teacher gave him an unknown substance to identify on its properties. after a few tests Tony listed his observations. Solid at room temperaure. Brittle. Conducts electrcity. What kind of substance does tony have? A:nonmetal B:Metal C:Metalloid D:Noble gas Please say ...
Tuesday, November 3, 2015 by Emily Peppo

7th Grade Science About Earth Quakes
Hi, I need some information about Earth Quakes. My question is: Where & Why do Earth Quakes occur? I'm not cheating or anything I just need some help with this topic for the project I'm doing about Earth Quakes right now. Please Help ME! Thanks :D
Tuesday, November 3, 2015 by MusicLover14

science
I WANT TO KNOW MOLARITY OF BENEDICT'S REAGENT FOR TITRATION .. BOTTLE CONSISTS OF 500ML BENEDICT'S REAGENT. PLZZ HELP
Tuesday, November 3, 2015 by ishween kaur

Science
The density of pure silver is 10.5 g/cm3. What is the mass of a sample with the volume of 10.0 cm3?
Monday, November 2, 2015 by Jewel

computer science
A Bagels store charges 75 cents per bagel for orders of less than a half-dozen bagels and 60 cents per bagel for orders of a half-dozen or more. Assume that the number of bagels ordered has been stored in a variable named NumBagels. Write VB code that calculates and stores the...
Monday, November 2, 2015 by Patricia

Science
can you help me understand why it takes more energy to heat something bigger than something smaller please. thank you.
Monday, November 2, 2015 by Abigail

science
Ana exerts a force of 20 N on a volleyball that has a mass of 0.15 kg. What is the force that the volleyball exerts on Ana?
Monday, November 2, 2015 by john

SS HELP PLZ ASAP
1) The science that studies population distribution and change is called _________(1 point) A. demography B. geography C. economy D. sociology 2) Canada is bigger than the united states, but only has _______ as many people.(1 point) A.one-half B.one-fourth C.one-eighth D.one-...
Monday, November 2, 2015 by regan

science
What are the major phases of the cell cycle?
Sunday, November 1, 2015 by Kennedy

science
why is it important for a cell to grow before it replicates its DNA?
Sunday, November 1, 2015 by andrea

Physical Science
An astronaut in a spacesuit has a mass of 100 kilograms. What is the weight of this astronaut on the surface of the Moon where the strength of gravity is approximately 1/6 that of Earth?
Sunday, November 1, 2015 by Chiara

science
A 155-N sign is supported by two ropes. One rope pulls up and to the right 26.5° above the horizontal with a tension T1, and the other rope pulls up and to the left 49.5° above the horizontal with a tension T2, as shown in the figure. Find the tensions T1 and T2.
Sunday, November 1, 2015 by stone

Science
What type of water evaporates quicker:well water or salt river water?
Sunday, November 1, 2015 by Ethan

need help
ESSAY EXAMINATION 1 Objective To successfully complete the course, you must complete Essay Examination 1, which requires you to write your answers to specific questions covering important concepts from your studies. Please provide your answers using a Microsoft Word file. You ...
Sunday, November 1, 2015 by Anonymous

science
Saturn rotation and revolution compared to earth
Sunday, November 1, 2015 by lee

science
A tower is 24 m high. A stone is projected upwards from the tower, at a velocitry of 24,5 m/s. Calculate how long it would take the stone to reach the ground at the roof of the tower.
Sunday, November 1, 2015 by francis

Science
A 25 l partially filled weather balloon has a volume of 11 L at sea level where the pressure is 1 atm. It rises to an altitude of 6.096km (20,000 feet) where the pressure is only .48 atm. What is the resulting volume? At what pressure would it burst? Use the internet to find ...
Saturday, October 31, 2015 by Rich

science
Why do earthquakes occur along the San Andreas Fault
Saturday, October 31, 2015 by valerie

science
A scenery in your drawing room has height h and is hung in the wall so that its lower edge is at a distance d above the eye of an observer. How far from the wall should the observer stand to get the best view?
Saturday, October 31, 2015 by sonam

science
A scenery in your drawing room has height h and is hung in the wall so that its lower edge is at a distance d above the eye of an observer. How far from the wall should the observer stand to get the best view?
Saturday, October 31, 2015 by sonam

Science
A body weight 500 N in air and weight of displace water is 300N then find apparent loss in the weight of body. The upthrust on body. The volume of the body
Saturday, October 31, 2015 by kartik

science
*Fill in the banks with suitable prepositon. Frustration results ------violence. (a) of (b)in (c)at (d)with
Saturday, October 31, 2015 by ABDULLA

Science
pH values of 12,6,10.5 and 4.3.which of these is acidic and basic
Friday, October 30, 2015 by Joshua

Science
Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? A: photosphere B: chromosphere C: corona D: prominence 2. Which of the following could have been found in the giant cloud that formed the solar system? A: hydrogen and helium B: ...
Friday, October 30, 2015 by Exam Kun

science
10g of calcium carbonate reacted with phosphoric acid to produce calcium phosphate, water and carbon dioxide. write the word equation
Friday, October 30, 2015 by munansi

Science
if two waves are traveling at the same speed along the x axis will the one with the longer wavelength have the larger or smaller freq ? explain in terms of the number of wavelengths that pass a given point on the x axis in 1 sec My answer: smaller But how do I explain interns ...
Friday, October 30, 2015 by Anonymous

Science
A vertical load of 100N is supported by two chains, A and B, in the same vertical plane. The force in A is 50N and acts in a line at 30 degrees to the horizontal plane (i.e. at 120 degrees to the 100N load). Determine the force in chain B and the angle between A and B.
Friday, October 30, 2015 by King

Science
An apple has a volume of 10ml and a mass of 0.8g. Will it sink or float in watee and I need to show my work
Thursday, October 29, 2015 by jay jay

Honors Physical Science
How do I find the speed of a truck that travels 14.5 km in 9.25 minutes in km/hr?
Thursday, October 29, 2015 by Adrienne

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