# Homework Help: Computers: Computer Science

## Recent Homework Questions About Computer Science

Science
Lead(ll) Iodide can be produced from the reaction of Lead(ll) nitrate and potassium Iodide.What mass of lead(ll) iodide is produced when 50.0 mL of each solution is combined,forming a 0.750 M Solution of potassium nitrate? Please help me to solve this problem thank you

Science
An insect of mass 20g crawls from the centre to the outside edge of a rotating disc of mass 200g & radius 20cm. The disc was initially rotating at 22.0 rad/s. What will be it's final angular velocity? What is the kinetic energy in the system?

Science
A truck of mass 2000kg moving on a highway experiences an average frictional force of 800N. If it's speed increases from 25m/s to 35m/s over a distance of 500m what is the force generated by the truck .

Science
A bullet of mass 20g, travelling at a speed of 350m/s, strikes a steel plate at an angle of 30° with the plane of the plate. It ricochet off at the same angle at a speed of 320m/s. What is the magnitude of the impulse that the steel plate given to the projectile? If the ...

Science
A box of mass 50kg is placed on an inclined plane. When the angle of the plane is increased to 30°, the box begins to slide downward. Calculate the coefficient of statics friction b/w the plane and box . Draw the free body diagram .

Science(chemistry)
Some students believe that teachers are full of hot air. If I inhale 2.2 litres of gas at a temperature of 18 degree Celsius and it heats to a temperature of 38 degree Celsius in my lungs,what is the new volume of the gas?

science
determine the number of grams of NH4CL that will dissolve in 100 grams of water at 25 Celcius.

Science
What is a cation?

Science
what are the similarities between thermal energy and electrical energy

Physical Science
A delivery man pushes the button to ring the doorbell. Which of the following forms of energy is not involved in this process? electrical sound mechanical gravitational my answer is gravitational

Science
describe what happens, at the molecular level, during melting.

science
calculate the maximum height?calculate how long ? land on the ground?

Science 6
Renny noticed that after oiling his skateboard wheels, it was easier to reach the speeds he needed to perform tricks. How did the oil help? A:The oil reduced friction between the moving parts of the skateboard. B:the oil increased the friction between the moving parts of the ...

Science
A 60-kg cheetah reaches a speed of 30m\s as it chases its prey. What is the kenetic energy of the cheetah?

Physical Science
An elephant drags a tree trunk along a rough horizontal surface by means of an attached rope which makes an angle of 30° with the horizontal. The force in the rope is 4 000N. CALCULATE the horizontal component of the force exerted by the rope on the tree trunk

Science
How many grams of ammonium nitrate nedd to be added to 500g of water so that the freezing point becomes -8.3 °C?

Physical Science
Like water, hydrogen fluoride, HF, and ammonia, NH3, have relatively high boiling points. Explain. A.The polar molecules of each of these materials have relatively strong attractions for themselves, which translates to relatively high boiling points. B. Since these molecules ...

Physical Science
If an element has a +1 positive charge and the following chemical symbol, how many electrons does it have? 17 on top, 6 on bottom, Oxygen (O) A. 7 B. 17 C. 5 D. 18

Physical Science
Why is metal shiny? A. The electrons absorb each light wave. B. The loose electrons reflect most wavelengths of light. C. The electrons emit light due to electronic excitation. D. The electrons transmit most wavelengths of light. (I think the answer is B, but I am not positive)

Science
Plants use nutrients that_______ adds to soil. 1.bedrock 2.sand 3.loom 4.humus I think it's humus.

Science!
What changes would a cold front bring to a warm, dry area? A)extended period of rain B)several gray skies C)dry and asunny skies D)rain or thunderstorms I think it is either a or d but I am leaning more to a, so please help!

science
a body moving with an inertia velocity of 30m/s accelerate uniformly at a rate of 10m/s until it attends a velocity of 50m/s.what is the distance covered during this period?

Science/Weather
Satellite images help meteorologists in all the following ways except: a) monitoring changes in the strength of storms b) locating areas of high and low pressure systems. c) predicting rainfall amounts d) recording daily high and low temperatures. I think the answer is c or d...

Science 6
Weather maps use isobar lines to show weather conditions. Which of the following info is indicated by these lines? A:high- and low- pressure areas B:high and low temperatures C:precipitation level D:cloud formation I think the answer is A. Thank you

Computer(E-mail)
can anybody understand mr about E commerce ??

science
What is the percent mass of calcium in a calcium supplement if 1.28-g of calcium carbonate is extracted from a 2.72-g pill?

science
A body starts from rest, the ratio of distances travelled by the body during 3rd and 4th seconds is -

Science
A pool ball leaves a 0.6 m high table with an initial horizontal velocity of 2.4 m.s.calculate horizontal and vertical velocity and time taken for the pool ball to fall to the ground

Science
To what temperature must a given mass of Nitrogen at zero degree celsius be heated to double its volume and pressure?

science
Jane can still pump air in the party balloon even through it is already inflated.What explains this phenomenon?

Science
1) How does the pH of a solution affect its solubility and structure of weak organic acids and bases, such as proteins and nucleic acids? 2) Why would a zipper or a Velcro strip be a good analogy to weak interactions between biological molecules? Thank you!

science
why did scientists think that proteins were the genetic material and not nucleic acids?

Science
What is the molar concentration of water in a solution of 10mM glucose? What types of ions are formed when water dissociates at room temp? Thank you!

Political Science
What are some pros and cons to privatizing the U.S Postal Service?

Science
How does a non metal behave chemically? Gimme an example

Math
Suppose 3 student change their vote from math to science describe how the frequency gable would change

math (Ms. Sue plz help)
Plz help my dad dose have time for me my mom die when i was a little girl plz do help me and i am not lieing a 4x4 grid with 5 blocks shaded (1 point) one over five, 25% *** five sixteenths, 31.25% one over four, 20% one over four, 25% 2. Model 32% on a 5 × 5 grid. (1 point) ...

Science
1. True or False: If the net force of an object is 0 N, the forces are considered unbalanced. A.)True B.)False** 2. Most people in the United States use feet and miles to measure distance in their everyday lives. Why do scientists in the United States use meters to measure ...

Honors Physical science
Lesson 13 force and motion unit test. I need 1-62

Science
How much work is done in moving a 25lb. load a distance of 7 feet?

Science
The force of gravity of objects on the moon is approximately one-sixth of their value on Earth. Joe's weight on the moon is 124 N. What will Joe's mass on Earth be?

Science
A box weighing 20lb. is being pushed up an incline. If the angle of incline was 90° to the ground, what effort would be needed to push the mass? I don't get how to get the effort if an angle was in the problem.

Science
The force of gravity of objects on the moon is approximately one-sixth of their value on Earth. Joe weighs 7633 N on earth. What will Joe's mass on the moon be?

Science
It is winter where Jenna lives. It’s been snowing all day, but now the snow has changed to sleet and then to freezing rain. What is happening to cause these changes? In your answer, explain how snow, sleet, and freezing rain form.

Science
although electromagnetic waves differ in the wavelengths they all travel at the speed of light which is A.300,00km/s B.6000km/h c.100km/s d.10,00km/s A rocket is a motor that can urn fuel without requiring A.water B.air c.electricity d.fire

Science
Teachers need a better way to give feedback to students. Writing on everyone's paper takes a lot of time,even though it is effective. Students and teachers need a better way.

Science
Five criteria for decision making matrix "teachers need a better way to give feedback to students."

Science
When sodiun is placed in water,it reacts violent to produce hydrogen gas and form sodium hydroxide solution. write a balanced chemical equation for this reaction

Science
Why the bulb glows when the electric current passes through it?

science
does condensation or evaporation occur on a cold can of juice is put on the table on a hot day

Science
Which of the following forces causes a feather to fall slower then a bowling ball? A.gravity B.rolling friction C.sliding friction D.air resistance

Must new substances be formed when you observe a chemical property? My answer is no because you are just observing. There is no reaction taking place. I don't know if my answer is correct.

Science
Must new substances be formed when you observe a chemical property?Explain.

Science
What effect does observing a substance's physical properties have on the substance?

Science
Why do automobiles rust more easily in wet climates than dry climates?

Science
If you let all of the liquid evaporate out of the pitcher, would you be able to see the solid particles of the drink mix? Explain.

Science
If one sound registers one decibel more than another, then it is ____ times as intense? Round your answer to three decimal places.

science
The Sun is unusual because it does not belong to a ____ ? A) solar system B) universe C) galaxy D) binary star system I think the answer is D but I'm not 100% positive.

Social Studies nhf
Thank you! BTW, nhf stands for need help fast :) thank you again in advance!! All right! So, I have a few essay questions I want to make sure are right! This is really important to me and I am not that good in science. Please help me!! Here goes everything! (6 points) 1. ...

Science
The African plate is moving toward the Eurasian plate at a rate of a few centimeters per year. How will this area change in 100 million years? In your answer, consider how continents will change and how the Mediterranean Sea will change. I was trying to click on your link but ...

Science
The African plate is moving toward the Eurasian plate at a rate of a few centimeters per year. How will this area change in 100 million years? In your answer, consider how continents will change and how the Mediterranean Sea will change.

Science
A geologists working in a national park finds a mineral he is carrying a kit that contains a penny, a hand lens, a piece of tile, a geologic hammer, and a jackknife. Describe how the geologists can use these items to determine some of the minerals characteristics.

Science
Which of earth's spheres contains mountains,valley's, and other landscapes?

science
Tom is marking the locations of active volcanoes on a world map. Explain how the locations of the volcanoes are related to Earths plates. can you please explain this to me, I don't understand....thx

SCIENCE asap :P
Twice a year on Earth, the number of hours of darkness is equal to the number of hours of sunlight. These events, where both day and night are 12 hours, are the spring and autumn equinoxes.Which of these describes the orientation of the sun and Earth on these two days? A.Earth...

science
How do you make a 10 ml buffer with 8M urea (mol. weight 60.06g/mol)

Science
Discuss ways in which the environmental health hazard can impact negatively on human health

science
Find flux density if area is 1mWb and area 1inch^2

Science
Describe how fans in a sporting stadium would need to move to create a transverse wave and a longitudinal wave

science
A galvanometer of resistance 100  gives full scale deflection at 10 mA current. What should be the value of shunt so that it can measure a current of 100 mA?

Science
1) If you let all of the liquid evaporate out of the pitcher, would you be able to see the solid particles of the drink mix? Explain. 2)Compare what happens when a geyser erupts to what happens when a tea kettle whistles. 3)Name something made of aluminum and explain why ...

science
Explain the differences between internal and external fertilization and the advantages and disadvantages of each reproductive strategy.

Earth Science
1. We start with 400 atoms of Uranium-238. How many remain after 4.5 billion years? _______ After 9 billion years? _______ After 13.5 billion years? ________ 2 . How long will it take for ½ of the original amount of Rubidium-87 to decay? _______ 3. Carbon-14 has a half-life ...

What do the lines making a circle around the high-pressure area indicate? A) Areas of equal pressure B) Areas of equal altitude C) An occluded front D) A stationary front

science
how should each form of energy be identified? A) energy A:gravitational energy /energy B:chemical energy B) energy A: nuclear energy/ energy B: electrical energy C) energy A: electromagnetic energy energy B:sound energy D) energy A: mechanical energy /energy B: thermal energy

science
what similarities do nuclear energy and chemical energy share? select all that apply. A) both are types of kinetic energy B) both are types of potential energy C) both involve magnetic energy D) both involve stored energy please help! anybody just anybody!

science
1. what occurs as the convection current moves toward the upper mantle density increases density decreases temperature increases temperature decreases 2. what occurs as the convection current moves toward the lower mantle (same options as #1)

digital literacy
what is an search engine? A-a website that searches specific information on the world wide web. B-a piece of hard ware that allows your computer to search for information. C-an external device that keeps your computer running. d-an piece of software that interprets data

Science
Ammonia is used as a refrigerant not ph3 why...?

Effective Learning Environment
Which would be an important consideration for developing a preschool classroom? A. Unlike kindergarten children, children at this age don't participate in long-term projects, so they don't need storage for longterm work. B. You won't need a science or math center since ...

Science physics
A uniform metres rod of weight 100N carries a weight of 40N and 60N suspended from the 20Cm and 90cm marks respectively, where will your pivot a knife edge to balance the rod.

science
Two bricklayers are going for a swim. One bricklayerâ€™s is the father of the other bricklayerâ€™s son. How are the two bricklayers related?

Science
if you want to completey vaporize 6.0g H2O liquid initally at 48.0 degree celcuis how many kj would be needed

Maths, agricultural science, life science and e on
What job can i do while am doing this sujects?

science
1. The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.Which of these observations of Barnard’s Star is most likely accurate? * 1 point

science
in xperiments involving a pithball electroscope what causes the pithball to move?

science
Place the following words into the illustration below:gametes,sporophyte,gametophyte, and zygote,. Explain how the terms are related. I need help please!!

Science
a pendulum bob has by passing through its lowest position. what is its speed when make angle of 60 with the vertical the length of the pendulum is 0.5 .

Science
A pump is used to lift 500 kg of water from a depth of 80 m in 10 seconds.Calculate the power rating of the pump if it's efficiency is 40% . Take g=10 m/ s*s.

Science
Material point is accomplishing harmonic oscillation. What is the time for its displacement from equilibrium position to half of its amplitude ? The period of oscillation is 24 s, and the initial phase is 0 rad.

science
What is the period of mathematical pendulum with a lenght of 39,2 m ?

Science
In what acceleration will tear a rope if it raises vertically body mass of 500 kg? The rope bears maximal strength force 15 kN.

Science
Determine the weight of an astronaut with a weight of 100 kg, if the rocket which rises him moves with acceleration 9,8 m/s^2

Science
Oscillating body has a period of 5 s. for one turn. Determine the frequency and angular frequency of oscillation.

Science
Body of mass 10 kg is at rest on a horizontal surface. A force of magnitude 10 N is applied to the body for 10 s. What is the final speed of the body?

science
A 2.4-kg pile of aluminum(ρ = 2.70 g/cm3)cans is melted, then cooled into a solid cube. What is the volume of the cube?

Science
Identify six stages of the process of scientific inquiry (scientific method) and explain why the process is not a rigid sequence of steps.

physical science
Luster Malleable Ductile Conductor Solid at room temperature Which element could be described by the list of properties above?

Computer
Create an algorithm, flowchart, and pseudocode for a solution of the following problem. This solution will include the use of arrays needed to complete all parts of the logic. You have requested to develop a program that will record and process the rainfall totals of a 12 ...

science
find the 8 kg of water at 80°c.

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