Saturday

June 25, 2016
**Chemistry**

Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to include states for the ...
*Sunday, November 8, 2015 by Kyson*

**chemistry**

Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What ...
*Sunday, November 8, 2015 by Dalton*

**Chemistry**

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 ...
*Sunday, November 8, 2015 by S*

**Chemistry**

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 ...
*Sunday, November 8, 2015 by S*

**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?*

**statistic**

2. High density lipoprotein (HDL) in healthy males follows a normal distribution with a mean of 50 and a standard deviation of 8. c)What is the 99th percentile of HDL in healthy males? d)If we consider samples of 10 patients, what is the 90th percentile of the mean HDL in ...
*Saturday, November 7, 2015 by mary*

**History**

Can someone please check my answer? Thank you for any help you can give! 1) During the colonial period, the economic development of the South was most directly dependent on the labor of: a. Factory workers b. Enslaved Africans c. Wheat farmers d. Irish immigrants My Answer~ b ...
*Saturday, November 7, 2015 by Abby *

**Chemistry**

Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What ...
*Saturday, November 7, 2015 by Dalton*

**chemistry**

Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to include states for the ...
*Saturday, November 7, 2015 by Kyson*

**maths**

A box 48 cm by 48 cm by 36 cm high is made of wood .5 cm thick. If the box has no lid, find the volume of wood used in making the box.
*Saturday, November 7, 2015 by Anonymous*

**Physics**

A ship fires its guns with a speed of 400 m/s at an angle of 35 with the horizontal. a. Find the range and maximum altitude. b. If the ship hits a plane that was 12 km away, how high was the plane flying?
*Friday, November 6, 2015 by Anonymous*

**Algebra **

If your truck gets 22 high way miles per gallon and your traveling 250 miles. It takes $50 to fill your tank. Gas is $2.40 a gallon how much are you spending on gas
*Friday, November 6, 2015 by Kayla*

**Physics**

Mr.Notten throws an egg from the top of a school at an initial velocity of 20m/straight upward. The egg is launched 50 m above the ground, and the egg just misses the edge of the roof on its way down? what is maximum height? what is the maximum height of the egg? Determine the...
*Friday, November 6, 2015 by Anonymous*

**Math**

Dawn raises money for her school in a jog-a-thon. She will get three dollars for every lap she completes. If it takes 4 laps to jog 1 mile, and Dawn jogs a total of 12 miles, how much money will Dawn raise for her school?
*Friday, November 6, 2015 by Claire*

**PLEASE HELP ASAP!! Algebra**

The probability that Shania is on time for school is 1/2. Find the probability that Shania arrives on time for school for the next 5 days. Express your answer as a percent, to the nearest tenth of a percent. A. 50% B. 15.6% C. 11.4% D. 3.1% ALSO, PLEASE EXPLAIN THOROUGHLY!! ...
*Friday, November 6, 2015 by Dakota*

**social studies**

3. By 1700, the British East India Company had founded A. Madras. B. Madras, Calcutta, and Bombay. C. Calcutta. D. Madras and Calcutta. Student Answer: B Answer: Incorrect Reference: 7. In the 1500s, if you were searching for a sophisticated cosmopolitan urban center of ...
*Friday, November 6, 2015 by Emma*

**Physics**

Lily throws a ball at an angle of 53.13 degrees above the horizontal from a building that is 10m high. The ball has a speed of 12m/s, .6 seconds after she throws it. What was the initial speed of the ball? This is a vector problem and uses variables such as vx, vy, vyi, delta ...
*Friday, November 6, 2015 by Hasan*

**English**

Is the following acceptable or is it bad English? Is there a better way to phrase the question and answer? (Someone told me it is bad English but he couldn't elaborate. I'm confused.) Qn: Is there school today? Ans: Today, there is no school because it is a school ...
*Friday, November 6, 2015 by chimingbell*

**Physics**

Miss E. deWater, the former platform diver of the Ringling Brothers' Circus, dives from a 80.0-meter high platform into a shallow bucket of water (see diagram at right). Determine her speed and her height after each second of fall. When t = 0 s: speed = 0 m/s and height = ...
*Friday, November 6, 2015 by Ryan*

**bluehills high school**

general solution 1-cos2x/4cos(90)
*Friday, November 6, 2015 by lebo*

**Physics**

Miss E. deWater, the former platform diver of the Ringling Brothers' Circus, dives from a 80.0-meter high platform into a shallow bucket of water (see diagram at right). Determine her speed and her height after each second of fall. When t = 0 s: speed = 0 m/s and height = ...
*Friday, November 6, 2015 by Ryan*

**Geography**

8. China is now reporting at least 650,000 infected with HIV/AIDS and the number in India may well exceed 5 million infected. True False Answer : True 9.what is not an example of how governments affect population change? A. Expansive population policies encourage large ...
*Thursday, November 5, 2015 by Geo*

**Geography**

1. All of the following explain negative geographical health influences on population expect....... A.High Infant mortality in Haiti B. Poor sanitation in Sub-Saharan Africa C. Destroyed hospitals in war-torn regions of the Middle East. D. Aging population of retired German ...
*Thursday, November 5, 2015 by Geo*

**history check answers pls**

1. Who controlled the most territory bordering the Louisiana Purchase? Spain France Great Britain Mexico 2. What was George Washington's role during the American Revolution? He was the founder of the Sons of Liberty. He was the commander of the ...
*Thursday, November 5, 2015 by anon*

**physics **

A hollow cylinder, a solid cylinder, a hollow sphere, and a solid sphere roll down a ramp without slipping, starting from rest. The ramp is 0.25 m high. All the objects have radius 0.035. What are their final speeds? Please show what equation you used and what you plugged in...
*Thursday, November 5, 2015 by Caroline*

**6th grade Math **

Maritza is baking cookies to bring to school and share with her friends her birthday. The recipe requires 3 eggs for every 2 cups of sugar. To have enough cookies for all of her friends, Maritza determined she would ned 12 eggs. If her mom bought 6 cups of sugar, does Maritza ...
*Thursday, November 5, 2015 by Harms*

**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*

**ART CHECKING!!! PLEASE CHECK IT!!! :(**

1. How has the artist used value in this painting?(Adoration of the Shepherds by Nicolaes Maes) A. The background is lighter than the foreground to draw the viewer's eye. B. The artist did not use value in this painting. C. The subject is lighter than the background to ...
*Thursday, November 5, 2015 by OHI*

**Zibonele high school**

What is a projectile?
*Thursday, November 5, 2015 by Philani*

**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*

**criminal justice**

The presentence investigation report (PSI) a. reflects positive school interest in the offender B. is based on the concept of parens patriae C. is required in all jurisdictions D. reflects a classical approach E. none of the above
*Wednesday, November 4, 2015 by Fernandez*

**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**

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*

**jim chavani high**

A cubic block of wood is painted various colours on all the sides. Each side of the block has the same length of 12cm. This block is now cut into many cubes of equal size of which the sides are now 3cm in length. c) How many cubes could be created from the original ...
*Wednesday, November 4, 2015 by musa *

**Shea middle school **

John oversleeps and misses the bus by 1 hour. He takes taxi to catch up to the bus. The taxi travels at an average speed of 100 km/h. At what time does the taxi catch up to the bus?
*Tuesday, November 3, 2015 by Anonymous*

**math**

A conical water tank with vertex down has a radius of 13 feet at the top and is 28 feet high. If water flows into the tank at a rate of 10 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 17 feet deep?
*Tuesday, November 3, 2015 by PAT*

**Probability**

A card is drawn from a standard deck. What is the probability that the card is less than 7, given that the card is not a face card? (Assume that ace is high, and that aces are not face cards.) A: .4165 B: .3846 C: .2959 D: .6 E: .5 F: None of these
*Tuesday, November 3, 2015 by Emily*

**MIS**

I need help with this question please. Imagine that you are developing the rules for an expert system to select the strongest candidates for a medical school. What rules or heuristics would you include?
*Tuesday, November 3, 2015 by Edgar*

**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*

**Physics**

A ball is projected horizontally from the edge of a table that is 0.465 m high, and it strikes the floor at a point 1.04 m from the base of the table. gravity is 9.8 m/s the initial speed of the ball is 3.376042 m/s ~How high is the ball above the floor when its velocity ...
*Tuesday, November 3, 2015 by Anonymous *

**math**

At a school there are 704 chairs to place into 22 classes if the same number of chairs are placed in each class rooms how many chairs will be in each room? So I divided 704 by 22 and came up with 32 chairs and I correct.
*Tuesday, November 3, 2015 by kim*

**bennet middle school**

Two times the quantity of fifteen divided by a number n
*Tuesday, November 3, 2015 by jennifer*

**geometry**

A fire hydrant that is 1.5 feet high casts a shadow that is 2.5 feet long. At the same time of day, a lamppost casts a shadow 15 feet long. What is the height of the lamppost?
*Tuesday, November 3, 2015 by jay*

**maths**

School for jan started at 9:00am finished at 3:00pm.If Jan knew she was 2/3 of the ay through the school, what time was it then?
*Tuesday, November 3, 2015 by anna*

**Umbonje secondary school**

A horizontal force F is applied to a crate,causing it to move over a rough horizontal surface,the kinetic frictional force between the crate and the surface on which it is moving depends on....the applied force
*Tuesday, November 3, 2015 by Nothando*

**help please english**

1. Read the definition. Then match it to the correct plot element. the high point, or turning point, in the action of the plot (1 point) • rising action • climax • falling action • resolution 1 Chris and Taylor ...
*Tuesday, November 3, 2015 by abdel1233*

**mechanics**

You have 1kg of aluminum (E=69GPa) to make a cylindrical tube with a high Euler buckling load. The tube must have a length L of 0.5m. You can either make a solid tube, or a thin walled tube with a wall thickness, t=0.5cm. The density of aluminum is 2700kg/m3. The tubes are pin...
*Tuesday, November 3, 2015 by alalal*

**Elem school**

I am an odd number greater than 390 but less than 400.my ones digit and hundreds digit are the same.what number am i?
*Tuesday, November 3, 2015 by Myleen *

**Math**

a wrench is dropped by a worker at a construction site. four seconds later the worker hears it hit the ground below. How high is the worker above the ground? (The velocity of sound is 1100 ft/s, and the distance the wrench falls as a function of time is s=6t^2
*Monday, November 2, 2015 by John*

**Spalding High School**

When a mass of 20 gram is hung on a spring the length of the spring id 16 centimetres. Adding another 10 gram increases the length to 19 centimetres. What is the unstrecthed length of the spring
*Monday, November 2, 2015 by Brittney kay Simpson*

**Phyics**

A pool ball leaves a 0.75-meter high table with an initial horizontal velocity of 30 m/s. Predict the time required for the pool ball to fall to the ground.
*Monday, November 2, 2015 by Alex*

**physics**

i need help understanding physics. im failing my class and dont want to do anything because i have zero clue where to start. im stuck on this problem currently. a cat pushes a ball from a 7.00 m high window, giving it a horizontal velocity of .20 m/s. how far from the base of ...
*Monday, November 2, 2015 by kaleigh*

**Math**

A school is keeping track of the number of tickets remaining for its year-end festival. The table shows the number of sales for the first, second, third, and fourth weeks of the month leading up to the festival. Which graph could represent the data shown in the table? Day | ...
*Monday, November 2, 2015 by Mr Shades*

**Math**

A school is keeping track of the number of tickets remaining for its year-end festival. The table shows the number of sales for the first, second, third, and fourth weeks of the month leading up to the festival. Which graph could represent the data shown in the table? Day ...
*Monday, November 2, 2015 by Mr Shades*

**tema senior high school**

An open box is to be made using one metre square of cardboard .find the maximum value of the box given that it has a square base
*Monday, November 2, 2015 by angela*

**algebra**

roger is 5 feet tall and casts a shadow 3.5 feet longer. at the same time,the flagpole outside his school casts a shadow 14 feet long. write and solve a proportion to find the height of the flagpole.
*Sunday, November 1, 2015 by masruja*

**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*

**English Language & Composition**

I need help on what my body paragraphs could talk about. My intro talks about how surveillance technologies can possibly threat civil liberties. I picked quotes from the sources I had to use that could help me in this essay. What are 3 ideas I can say in each body paragraph ...
*Sunday, November 1, 2015 by Diana*

**Day secondary school kataeregi**

The first and last terms of an a.p are 79 and 5 and it's sum is 814 find(a) the number of terms in the a.p(b)the common different between them.(c) the 9th terms is of an a.p is 52, while the 12th terms is 70 find the sum of it's 20th terms.
*Sunday, November 1, 2015 by Muhammad haruna ubandawaki*

**St Joseph high school**

Find the height of a triangle whose area is 39000 sq cm and base is 260 cm
*Sunday, November 1, 2015 by Rahima rakhangi*

**school..maikona physics question**

a projectile's launch speed is five times its speed at maximum height.find the launch angle?
*Sunday, November 1, 2015 by umuro*

**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*

**physics**

At the beginning of a new school term, a student moves a box of books by attaching a rope to the box and pulling with a force of F=86.4 N at an angle of 64 degree. The acceleration of gravity is 9.8 m/s^2. The box of books has a mass of 13 kg and the coefficient of kinetic ...
*Sunday, November 1, 2015 by luma*

**us history **

1)Which of these was a precedent that George Washington set? a) constitutional amendment process b) formal presidential dinners c) singing of the national anthem d) use of a president cabinet ** _____________________________________ 2)Read the following paraphrase from George ...
*Sunday, November 1, 2015 by Ana*

**HEALTH PLZ ITS OVERDUE **

1. The type of family structure that has a biological parent, a stepparent, and the children of one or both parents describes which type of family unit? a.blended family b.extended family c.foster family d.nuclear family 2.some children move from one family to family several ...
*Sunday, November 1, 2015 by regan *

**us history**

Lewis and Clark traveled from St. Louis, which is beside the Mississippi River. Which of the following correctly describes the land they saw as they traveled to the Pacific Northwest? A) Flat and low around the Mississippi River, with a sharp and sudden rise to the Rocky ...
*Saturday, October 31, 2015 by Ana*

**AP PHSYICS DUE LATE HOMEWORK HELP!!!**

4. Assuming that ball 1 was thrown with an initial velocity of 5 m/s, how far will it land away from the building horizontally? A. 10 M b. 16 M C. 21 M D. 0.63 M 5. A projectile is launched a t 35 m/s at an angle of 33 degrees. Determine (a) the maximum height of the ...
*Saturday, October 31, 2015 by Anonymous*

**physics**

4. Assuming that ball 1 was thrown with an initial velocity of 5 m/s, how far will it land away from the building horizontally? A. 10 M b. 16 M C. 21 M D. 0.63 M 5. A projectile is launched a t 35 m/s at an angle of 33 degrees. Determine (a) the maximum height of the ...
*Saturday, October 31, 2015 by Anonymous*

**APA Format**

I'm so used to using MLA that I'm struggling with citing in-text using APA. "Metropolitan areas with high concentrations of employment in higher paying occupations also tend to have greater inequality.” (Cunningham, 2015). Does that look right? Do I need to ...
*Saturday, October 31, 2015 by mysterychicken*

**Pretoria Muslim Trust sunni school**

Math Litracy,Life sciences,Cat,Business studies. Can I become a psychologist with these subjects
*Saturday, October 31, 2015 by Mpho Molokomme *

**Conway high**

The mean of a normal distribution of a set of truck tires is 200 pounds with a tard variation of 10 pounds. What is the probability of a randomly selected set of tires between 200 and 220 pounds?
*Friday, October 30, 2015 by Dave145*

**Physics**

A helicopter is flying horizontally at a constant 40 m/s when it drops a package below. Where does it land? 1. About 50 m ahead of the helicopter 2. About 80 m behind the helicopter 3. There is no way to answer without knowing how high the helicopter was above the ground when ...
*Friday, October 30, 2015 by Anonymous *

**Geography **

1. Demographers report the population density of a country as a measure of total population relative to land size. TRUE FALSE Answer : true 2. Which of the following is not an example of adequate physiological population density? A. Cities such as Luxor, Cairo, and Alexandria ...
*Friday, October 30, 2015 by Geo*

**suncrest high school**

maths give the coordinate for:point A (-3;-2) is reflected in the x-axis
*Friday, October 30, 2015 by phumelele*

**college physics **

you are driving home from school at 90 km/h. it then began to rain and you slow to 50km/h. your arrive home after driving 3 hours and 20 minutes, how far is your hometown from school? what is the average speed?
*Friday, October 30, 2015 by zain*

**Siddhartha Higher Secondary School **

English what will you do if your parents were unable to send you school
*Thursday, October 29, 2015 by swachitta*

**English/Writing**

Following are some brief versions of Aesop's fables. After reading these stories, write what you think the moral is. 1. One day a hungry fox was walking through a vineyard. Hanging on the vines were bunches of delicious looking grapes. Wanting very much to eat these grapes...
*Thursday, October 29, 2015 by Victoria*

**English/Writing**

Write brief accounts upon the nursery rhyme from the indicated point of view: "Little Jack Horner" 1. Jack's mother's comments on his sticking his finger in the pie. "Oh, Jack! How could you?! That pie was to be eaten after the Christmas feast!" 2. ...
*Thursday, October 29, 2015 by Victoria*

**Math **

Sarah starts at a point 26 miles from school and runs toward school at 6 miles per hour. Ryan starts from school 1.3 hours later and runs towards Sarah at 8 miles per hour. Let x be the number of hours Sarah has been running Write an expression in terms of x for the distance ...
*Thursday, October 29, 2015 by Julie*

**Ave maria catholic secondary school**

an aeroplane leaves an airport,flies due north for two hours at 500km/hr.it then flies 450km on a bearing 053.how far is the plane from the airport and what is its bearing from bearing from east
*Thursday, October 29, 2015 by Mercy*

**Pre-Calculus**

Use the CALC features of the TI to answer the following. Show what you put into the calculator & what CALC feature you used. Round to the nearest tenths. The equation h = 20 cos (π/4 (t-3)) + 23 tells how high above the ground a ferris wheel car is at any given time. h is...
*Thursday, October 29, 2015 by Clarice*

**English/Writing**

Explain the point of view for each of the following: A. Participant 1: teenager Partcipant 2: father Situation: family car on a date A: The teenager is excited to be driving the family car on his date. The father is worried that some damage may come upon the car. B. ...
*Thursday, October 29, 2015 by Victoria*

**Spanish**

what is the most likely the reason that Spanish-speaking students in Costa Rica, Mexico, and Argentina all learn a second language in school? a. Spanish is a common language b. Spanish is not understood by many people c. it is important to be able to communicate in more than ...
*Thursday, October 29, 2015 by Kaai97*

**Language Arts**

The directions are underline the nouns in the sentence and say if they are common, proper or collective. 1. He gave me a bunch of grapes. -underline the word bunch which is collective 2. London is on the river Thames. -underline London and Thames which are both proper 3. The ...
*Thursday, October 29, 2015 by Patrick*

**math**

jonathan purchases calculators for his math club after school. the total cost (t) is $325 for 25 calculators (c). what is the equation that represents this proportional relationship
*Wednesday, October 28, 2015 by enmanuel mejia*

**Math**

Sixty girls were scheduled to paint flower pots for the school's annual fair. When 3 of the girls became sick the rest of the girls had to paint 8 more flower pots each how many flower pots did they have to paint altogether ?
*Wednesday, October 28, 2015 by Jen*

**precalc**

h = -15 sin (π/7 (t-2)) + 42 h is the height of the ball above the floors in inches at time t seconds 1) what is the highest the ball will ever bounce? 2) when is the first time the ball bounces that high? 3) write a general expression for the times at which the ball is ...
*Wednesday, October 28, 2015 by yani*

**Math**

In a high school reunion, the organizers decided to sell 1500 raffle tickets at 1000 each for the four prizes of 250,000 125,000 75,000 50,000 What is the expected value of one ticket? I got -670, is this correct? Thanks!
*Wednesday, October 28, 2015 by Jen*

**Math**

If you are 15 how old will you be when you get out of high school?
*Wednesday, October 28, 2015 by Aaliyah *

**chem**

How would your experimental formula of magnesium chloride “MgClx” have been affected if your product was not dried completely before weighing it? Would “x” be too high or two low?
*Wednesday, October 28, 2015 by charles*

**Geography **

10. Which of the following best describes a nations resistance towards immigration despite having an aging population. A. The Japanese government discourages interracial couples and encourages homogeneity of the population. B. China implemented a one-child policy to reduce a ...
*Tuesday, October 27, 2015 by Geog*

**Math**

Trina works after school and on weekends. She always works three days each week. This week she worked 2 3/4 hrs on Monday. 3 3/5 hrs on Friday and 5 1/2 hrs on Saturday. Next week she plans to work the same number of hrs as this week but will work the same number of hrs each ...
*Tuesday, October 27, 2015 by Crystal*

**Physics**

A 200 N box is pushed up an incline 10 m long and 3 m high. The average force (parallel to the plane) is 120 N. a.) How much work is done? b.) What is the change in the PE of the box? c.) What is the change in KE of the box? d.) What is the frictional force on the box?
*Tuesday, October 27, 2015 by Ana*

**physics **

A boy in a wheelchair (total mass, 46.0kg) wins a race with a skateboarder. He has a speed of 1.33m/s at the crest of a slope 2.24m high and 13.2m long. At the bottom of the slope, his speed is 6.35m/s. If air resistance and rolling resistance can be modeled as a constant ...
*Tuesday, October 27, 2015 by Juicy*

**11 Grade College Prep Math-Based Physics**

Not good at physics, so could someone check these practice test questions please? Explanations are appreciated. 1. Which of Newton's Laws says you cannot touch anything without being touched? a) 4th b) 2nd c) 1st d) 3rd *** 2. A 3.00 kg ball is dropped from rest from the ...
*Tuesday, October 27, 2015 by Ana*

**Physics**

A 200 N box is pushed up an incline 10 m long and 3 m high. The average force (parallel to the plane) is 120 N. a.) How much work is done? b.) What is the change in the PE of the box? c.) What is the change in KE of the box? d.) What is the frictional force on the box?
*Tuesday, October 27, 2015 by Ana*

**language**

Which of the following is a complete sentence? A. When I was young and ambitious and loved going for walks in the park. B. Running through the park and around the school before breakfast. C. Walking with a limp as a result of the wreck. D. I went walking.
*Tuesday, October 27, 2015 by alixie*

**science**

a skater with a mass of 65kg,reaches the bottom of a ramp ,2.5 metres high ,going at 27km.h-1. calculate his kinetic energy as he reaches the ramp calculate how fast he is going by the time he reaches the top of the ramp
*Tuesday, October 27, 2015 by zinhle*

**National school**

A dilute solution of sulfuric acid is added to 15g of copper and iron mixture. a) write the balanced equation for the occuring reaction. b) the volume of H2 evolved at standard conditions is 4.48L, what is the mass of each of the metals constituting the mixture? Vm=24mol.L-1
*Tuesday, October 27, 2015 by Maha*