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April 25, 2014

Homework Help: Science

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Recent Science Questions

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science
Define water equivalent of a calorimeter. State its SI unit.
Tuesday, July 9, 2013 at 12:16am

science
10% of the atmosphere is located above the altitude where the pressure is a. 100 b. 900
Monday, July 8, 2013 at 4:48pm

science
If you have 2 grams of salt and it is dissolved in 20 grams of water, what will the weight be?
Monday, July 8, 2013 at 10:01am

science
Can one be moral and not believe in God?
Monday, July 8, 2013 at 2:18am

physical science
a string 0.5 m long is used to whirl a 1 kg stone in a horiziontal circle at a uniform velocity of 5m/s what is the tension on the string?
Saturday, July 6, 2013 at 9:11am

science
how much work done if lina lift a package that weight 5.5 to a height of 0.5 m?
Saturday, July 6, 2013 at 1:53am

Science
Explain the bonding in sodium metal. You may wish to include a diagram. The atomic number for Sodium is 11
Friday, July 5, 2013 at 1:26pm

Science
If you lost some metal while transferring it from the balance to the evaporating dish, how would your empirical formula be affected?
Thursday, July 4, 2013 at 11:10am

SCIENCE,PHYSICS
A truck of mass 3000 kg is harnessed to a trailer (Trailer A) of mass 1000 kg. The trailer is hooked to ANOTHER trailer (Trailer B) of mass 500 kg. The truck begins to accelerate to the right at 1 m/s2, pulling the trailers along. What is the ratio of the force the truck ...
Thursday, July 4, 2013 at 1:59am

physical science
A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 82 kg, and the height of the water slide is 11.3 m. If the kinetic frictional force does -6.2 × 103 J ...
Wednesday, July 3, 2013 at 6:36pm

science
Why do we want students to learn APA 6th edition formatting?
Wednesday, July 3, 2013 at 5:08pm

science
Make a standard table with this data Table Number: 1 Table Title: Differences in Content for Male and Female Dreams Data: Male Friendliness 15 Female Friendliness 25 Male Aggression 40 Female Aggression 15
Wednesday, July 3, 2013 at 5:08pm

science
2) Create an APA reference for this chapter of the publication as one would find in the APA reference page Title of book: SUPERHEROES ON EARTH Pages in book: 1-250 Chapter Title: SECRET IDENTITES Pages of chapter: 45-67 Author: BRUCE WAYNE AND CLARK KENT Editors: JACK BLACK ...
Wednesday, July 3, 2013 at 5:07pm

science
1) Create an APA reference for this publication as one would find in the reference page(2 marks): Article Title: Truly, Madly, Depp-ly Author: Frank DeCaro, Bill Evans, Tom Black, Rachel McGill, Ed Strong, Sue Koch, Mark Thomas, Rachel Dew, and Gary Edwards. Publication: ...
Wednesday, July 3, 2013 at 5:06pm

Science
Female silkworm moths (Bombyx mori) attract males by emitting chemical signals that spread through the air. A male hundreds of meters away can detect these molecules and fly toward their source. The sensory organs responsible for this behavior are the comblike antennae visible...
Wednesday, July 3, 2013 at 3:34pm

Science
If you were a pharmaceutical researcher, why would you want to learn the three dimensional shapes of naturally occurring signaling molecules?
Wednesday, July 3, 2013 at 2:56pm

science
Why do we want students to learn APA 6th edition formatting?
Wednesday, July 3, 2013 at 1:20pm

science
Make a standard table with this data Table Number: 1 Table Title: Differences in Content for Male and Female Dreams Data: Male Friendliness 15 Female Friendliness 25 Male Aggression 40 Female Aggression 15
Wednesday, July 3, 2013 at 1:20pm

science
Create an APA reference for this chapter of the publication as one would find in the APA reference page (2 marks): Title of book: SUPERHEROES ON EARTH Pages in book: 1-250 Chapter Title: SECRET IDENTITES Pages of chapter: 45-67 Author: BRUCE WAYNE AND CLARK KENT Editors: JACK ...
Wednesday, July 3, 2013 at 1:17pm

science
1) Create an APA reference for this publication as one would find in the reference page Article Title: Truly, Madly, Depp-ly Author: Frank DeCaro, Bill Evans, Tom Black, Rachel McGill, Ed Strong, Sue Koch, Mark Thomas, Rachel Dew, and Gary Edwards. Publication: Advocate Volume...
Wednesday, July 3, 2013 at 1:17pm

general science
how to explain how the mass of a rock could be found
Wednesday, July 3, 2013 at 6:02am

Physical science
Why are models important?
Sunday, June 30, 2013 at 11:57pm

science
a machine gun can fire 20 bullet persecond if speed of bullet is 100m/s and if each bullet weight 100grams calcuate force required to hold the gun in its position
Sunday, June 30, 2013 at 9:39am

Science
How far will a ball travel in 4.2 s if a baseball thrower pitches ball at 43 ms-1? (make sure you have the correct units)Velocity (ms-1) = Distance (m) / Time (s)
Saturday, June 29, 2013 at 9:28pm

science
A screw is a modified form of
Saturday, June 29, 2013 at 5:49pm

science
The driver of an 800.0 kg car decides to double the speed from 25.0 m/s to 50.0 m/s. What effect would this have on the amount of work required to stop the car, that is, on the kinetic energy of the car?
Saturday, June 29, 2013 at 2:03pm

science
you need to prepare 30g of calcium cholride. you have 2m hydrochloric acid and a new container off pure calcium carbonate. Calculate the number of mole of calcium chloride that u need to prepare
Saturday, June 29, 2013 at 12:54pm

science
5.0g of magnesium metal reacted with 1000cm3 of 4.5M HCl solution to produce hydrogen gas. Calculate the amount of HCl left after the reaction
Saturday, June 29, 2013 at 9:26am

Science
What is the Magnitude of a proton with mass 1.67 10-27kg, moving with a speed of 5.70 106m/s
Saturday, June 29, 2013 at 8:26am

Science
5 ml of water at 4 degree Celsius (density 1 g/ml) is converted to steam at 110 degree Celsius. What volume will the steam occupy when pressure is 380 Torr?
Saturday, June 29, 2013 at 1:04am

science
the block is acted upon by its W=200 lb, a horizontal force Q=600 lb, and the pressure P exerted by the inclined plane. The resultant R of those forces is up and parallel to the incline thereby sliding the block up it. determine P and R.
Friday, June 28, 2013 at 10:36pm

Science Biochemistry
List 3 ways the production of energy from nutrients is regulated in the body.
Friday, June 28, 2013 at 6:42pm

science
How to make a food web with at least 4 food chains showing how the eagles depends on other animals?
Friday, June 28, 2013 at 9:22am

science(physics)
a ball of mass 8kg falls from rest from a height of 100m negleting a resistant calculate its kinetic energy after falling a distance of 30m (take gravity as 10m/s?
Thursday, June 27, 2013 at 11:16am

science
How much heat is absorbed when 52.3 g H2O(l) at 100°C and 101.3 kPa is converted to steam at 100°C? (The molar heat of vaporization of water is 40.7 kJ/mol.)
Thursday, June 27, 2013 at 10:46am

Science
a piece of wood floats on liquid with 4/5 of its volume submerged.if the density of wood is 800 kg/m3 then the density of liquid is?
Wednesday, June 26, 2013 at 9:58pm

psychology
Ethical standards in human research allow researchers to balance interests in acquiring new information with concern about: a. public approval b. Dignity and human welfare c. Making money from experiments d. Applied science e. Getting academic recognition
Tuesday, June 25, 2013 at 3:19pm

Science
Many farmers harvest their crops in the fall and then let the leftover plant material stay on the ground over winter. How does this help prevent erosion?
Tuesday, June 25, 2013 at 1:45pm

Science-Chemistry
List materials that are commonly found at home or in school that have: a. Different structures and exhibit different properties b. The same chemical make-up (composition) but with different structures, hence, different properties c. The same properties but with different ...
Monday, June 24, 2013 at 11:05pm

Science - Chemistr++++++++++++++++++++++++++++++++
List materials that are commonly found at home or in school that have: a. Different structures and exhibit different properties b. The same chemical make-up (composition) but with different structures, hence, different properties c. The same properties but with different ...
Monday, June 24, 2013 at 11:04pm

science
how to make a problem about butterfly, using the scintific method
Monday, June 24, 2013 at 8:09pm

statistics check
The computer-science aptitude score, x, and the achievement score, y (measured by a comprehensive final), were measured for 10 students in a beginning computer-science course. The results were as follows. (Give your answers correct to two decimal places.) x 7 10 19 9 20 22 6 ...
Sunday, June 23, 2013 at 8:41pm

conceptual science
In the absence of air resistance, a ballplayer tosses a ball straight up. (a) By how much does the speed of the ball decrease each second while it is ascending? (b) By how much does its speed increase each second while it is descending? (c) How does the time of ascent compare ...
Sunday, June 23, 2013 at 6:15pm

science
an electric oven of 2kW power heating is operated in a domestic circuit that has a current rating 5A. If the supply voltage is 220V. What result do you expect? Explain
Sunday, June 23, 2013 at 3:15am

statistic of behavioral science
for each of the following, identify the exam score that should lead to the better grade. In each case, explain your answer. A score of x=56, on an exam with the mean =50 and the standard deviation of 4; or a score of x=60 on an exam with the mean=50 and the standard deviation =20
Saturday, June 22, 2013 at 10:38pm

Science
A picture os the salor sysmty
Saturday, June 22, 2013 at 10:23am

science (physics)
a skaterboarder is moving 5.25 m/s when he starts to roll up a frictionless hill. how much higher is he when he comes to a stop? (energy problem)
Friday, June 21, 2013 at 12:22pm

science
Frenda et al. (2013, p. 285) stated "first, because Slate gathered little information about its participants other than political ideology, it may be that variables confounded with ideology—and not ideology per se—were responsible for the differences we observed...
Friday, June 21, 2013 at 10:37am

Science
A lorry has a mass of 5640kg and accelerates uniformly from rest to reach a velocity of 100km/h in 10s. Determine the acceleration of the lorry. Determine the force needed to accelerate the lorry
Friday, June 21, 2013 at 10:31am

Engineering science
A lorry has a mass of 5640kg and accelerates uniformly from rest to reach a velocity of 100km/h in 10s. Determine the acceleration of the lorry. Determine the force needed to accelerate the lorry
Friday, June 21, 2013 at 10:26am

science
Frenda et al. (2013, p. 285) stated "first, because Slate gathered little information about its participants other than political ideology, it may be that variables confounded with ideology—and not ideology per se—were responsible for the differences we observed...
Thursday, June 20, 2013 at 5:57pm

science
A comet experiences uniform acceleration from 60 m/s to 183 m/s in 10.0 s. What is its rate of acceleration?
Thursday, June 20, 2013 at 3:10pm

Science
Take two glasses put 20g sugar in 2l water in first glass and put 15g sugar in 15ml water in second glass now Chekh out which one will be more concentrated and find out molarity normolity of both
Thursday, June 20, 2013 at 8:45am

Science
Take two glasses put 20g sugar in 2l water in first glass and put 15g sugar in 15ml water in second glass now Chekh out which one will be more concentrated and find out molarity normolity of both
Thursday, June 20, 2013 at 8:40am

science
a car travels a distance of 8 km from p to q then moves 6 km at right angle to PQ find its resultants 1.distance 2.displacement
Wednesday, June 19, 2013 at 9:12am

science
a car travels a distance of 20 km in 6 minutes calculate the speed in 1. km min 2. m/s 3.km/h 4.cm/s
Wednesday, June 19, 2013 at 9:05am

science
Solar energy is mainly caused due to a) Burning of hydrogen in the oxygen b) Fission of uranium present in the sun c) Fusion of protons during synthesis of heavier elements d) Gravitational contraction
Wednesday, June 19, 2013 at 6:24am

science
Hydraulic press is based on a) Archimedes principled b) Bernoulli’s solution c) Pascal/s law d) Reynold’s law
Wednesday, June 19, 2013 at 6:23am

science
The heaviest naturally occurring element is a) Uranium b) Iron c) Silica d) Aluminum
Wednesday, June 19, 2013 at 6:23am

science
The most malleable metal is a) Sodium b) Lead c) Steel d) Gold
Wednesday, June 19, 2013 at 6:22am

science
A boat of mass 40 kg is at rest; A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. what is the velocity of boat? a) 4 m/s b) 2 m/s c) 8 m/s d) 1 m/s
Wednesday, June 19, 2013 at 6:21am

science
Silvering of mirror is done by a) AgNO3 b) Ag2O3 c) Fe2O3 d) Al2O3
Wednesday, June 19, 2013 at 6:21am

science
4.4 g of CO2 contains how many liters of CO2 at STP ? a) 2.4 litre b) 2.24 litre c) 44 Litre d) 22.4 litre
Wednesday, June 19, 2013 at 6:19am

English
1. He won first place in the math contest. 2. He got first place in the speech contest. 3. He received first place in the science contest. (Are they all grammatical? Can we use all the verbs?)
Wednesday, June 19, 2013 at 2:02am

physics
Two 4.3 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books
Tuesday, June 18, 2013 at 3:12pm

science
I want to creat a easy-to-use formula to measure the conversion on a C2H6 cracking furnace
Tuesday, June 18, 2013 at 5:53am

computer science
Describe computer laguages according to its generation.
Tuesday, June 18, 2013 at 3:14am

science physics
A chicken decides to cross a road. The road is perfectly straight, runs north-south, and is full of cars driving by from south to north. The cars have a log-normal distribution for the distance between each car. However, the cars all travel at 80 km/hr. The chicken stands next...
Monday, June 17, 2013 at 5:24pm

science
If the two ponds were perennial (i.e., year-round) ponds, because of intersecting the water table, how would the presence or absence of water in the other depressions differ from that which is shown?
Monday, June 17, 2013 at 10:23am

science
Find the overall average speed of swimmer number one during the race. Find the overall average speed of the second swimmer from the time he starts swimming until he ends his race. What is the instantaneous speed of the second swimmer at time t = 25 s during the race? What is ...
Monday, June 17, 2013 at 7:34am

science
How long does it take the ball in problem 5 to travel 15 meters after being played? Neglect the gravitational effect, and suppose the ball travels along a straight line and assume a speed of 24 m/s. A racecar driver steps on the gas, and his car travels 16 meters in 2 seconds...
Monday, June 17, 2013 at 7:24am

science
What is the acceleration of a tennis ball if initially it comes toward the player's racquet at 20 m/s, and it leaves in the opposite direction at 24 m/s? A high-speed camera indicates the time of impact of 4.0 ms.
Monday, June 17, 2013 at 6:49am

Science
Project Work-Draw(x-t)graph on graph paper which represents a body is travelling with uniform acceleration.
Monday, June 17, 2013 at 4:19am

science
0.63 gm of oxalic acid (COOH)2 2H20 are dissolved in 500 ml of solution. Calculate the molarity of the solution?
Sunday, June 16, 2013 at 4:07am

science
a bottel contains 500 ml of 2.4 M HCL. How much water should be added to dilute it to 1.6 M HCL. Solution
Sunday, June 16, 2013 at 4:03am

science
4l of water is added to 2L of 6M HCL.What is the molarity of the final solution
Sunday, June 16, 2013 at 3:58am

science
a body covers a distance of l metre along a semicircular path. calculate the magnitudeof displacement
Saturday, June 15, 2013 at 11:24am

SCIENCE
A BODY IS DROPPED FROM A BUILDING 10 M HIGH. CALCULATE THE TIME OF FALL AND THE SPEED WITH WHICH IT HITS THE GROUND.(TAKEg=10M/SECOND SQUARE).
Saturday, June 15, 2013 at 1:15am

science
whether or not we as humans should be concerned with the extinction rate. Additionally, discuss whether or not humans strive to preserve representative samples of all biomes on the planet.
Friday, June 14, 2013 at 8:18pm

science
If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider the ...
Friday, June 14, 2013 at 6:46am

science
The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is polar coordinates (r,&#...
Friday, June 14, 2013 at 6:45am

Science
The Asteroid433Eros has a mass of 7.2 x 1015 kg, and a radius of = 11 km.  What is the escape velocity of this asteroid (remember to use r in meters)?  What consequence would this have for someone trying to walk on this asteroid?
Thursday, June 13, 2013 at 10:09pm

Science
What is the circular velocity of an Earth satellite 1000. km above Earth's surface? (Note: Earth's average radius is 6371 km.)
Thursday, June 13, 2013 at 10:09pm

Science
Compared with the strength of Earth's gravity at its surface, how much weaker is gravity at a distance of 10 Earth radii from Earth's center? At 20 Earth radii?
Thursday, June 13, 2013 at 10:08pm

science
what could not be part of a tree canopy? a. moss b. roots c. leaves d. branches
Thursday, June 13, 2013 at 8:39pm

Science
Calculate the linear momentum of a pickup truck that has a mass of 1100 kg and is traveling eastward at 22 m/s.
Thursday, June 13, 2013 at 8:27pm

Computer Science
write a program that will prompt the user for a value and print the value entered to the screen. The program stops when the user enters a value less than zero. I need an IPO chart, pseudocode and C++
Thursday, June 13, 2013 at 2:19pm

science
Does the study by Frenda et al. (2013) prove that our memories are easily manipulated and should therefore not be trusted? Article: False Memories of Fabricated Politicians
Thursday, June 13, 2013 at 1:01pm

science
The most convenient way to express vectors in the two dimensional plane is in the familiar (x,y) Cartesian coordinates. However, one can express vectors in other coordinate systems as well. For example, another useful coordinate system for the plane is polar coordinates (r,&#...
Thursday, June 13, 2013 at 12:32pm

Science
what are the four steps need to ascertain whether a fungus was the causes of the disease.
Thursday, June 13, 2013 at 11:20am

Science
Calculate the average size of the microbes in Saccharomyces ? show your working out.
Thursday, June 13, 2013 at 11:19am

Science
Saccharomyces Cerevisiae is a fungi, it is used in the production of bread. Rhizopus is a fungus that causes mouldy bread. What is the difference between the structure of the fungi, when looking at Saccharomyces and Rhizopus under a microscope?
Thursday, June 13, 2013 at 11:17am

Science
Rhizopus is a Fugus that causes mouldy bread. Identify the functions of the main features in Rhizopus,when observing it under a microscope.
Thursday, June 13, 2013 at 11:09am

science
A snail travels 45 cm in 20 min. Its average speed is Answer 2.25 cm/h. 15 cm/h. 90 cm/h. 135 cm/h.
Thursday, June 13, 2013 at 10:58am

social science
how is biology related to tourism?
Thursday, June 13, 2013 at 9:45am

science
how many molecules of oxygen are produced from the balanced equation 2kclo3=2kcl+3o2
Thursday, June 13, 2013 at 4:42am

physical science
David builds a wood raft that weighs 100lbs (445 N). The bottom area of the raft is 4 meters and by 3 meters and the raft is 0.6 meters thick. When the raft is floats in water, what must the height of the water line be on the raft?
Thursday, June 13, 2013 at 2:21am

Physical Science
Because light travels in a straight line and casts a shadow, Isaac Newton hypothesized that light is A. a stream of particles. B. a wave. C. heat.
Wednesday, June 12, 2013 at 8:36pm

Physical Science
Which kind of light is used to carry information through optical fibers? A. fluorescent B. sodium-vapor light C. laser
Wednesday, June 12, 2013 at 8:32pm

Social Science
Rorschach vs MMPI-Minnesota Multiphasic Personality Invertory? Which is better, MMPI or Rorschach?
Wednesday, June 12, 2013 at 4:15pm

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