# Posts by tina

Total # Posts: 1,241

**Physics**

1. A 38kg object is traveling down the ramp and experiences a frictional force of 180N. Calculate the angle of incline and the friction coefficient between the two surfaces. Answers: μ(mu)=0.55 Θ=28.9 degrees But please show work and all equations/variables used.

**physics**

How can I find kinetic friction (Fk) without mu? I know the normal force which is 201N. The mass of the object is 30kg. This is the full questions of it helps. I just don't understand how to find kinetic friction 1. If a 30kg object experiences a normal force of 210N when ...

**Physics**

1. If a 30kg object experiences a normal force of 210N when traveling down a ramp, what is the angle of incline? Also, calculate the force of friction and the coefficient of friction. Answers: μ(mu)=0.98 Θ=44.5 degrees But please show work and all equations/variables...

**Physics**

1. If a 500N person is skiing on a slope with an angle of incline of 67 degrees and there was a friction coefficient of 0.19, determine the person’s acceleration rate. If starting from rest, what is the overall displacement after 30 seconds?

**chemistry**

Take a ruler and measure the height of the textbook three times. Record the three measurements, and discuss the uncertainty in your measurements. Remember to report the smallest markings on your ruler.

**Chemistry**

Part A Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol) A -263 B -391 C +203 D -523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART B----THIS ONE I NEED HELP ON Express ...

**Chemistry**

Part A Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol) A -263 B -391 C +203 D -523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART B----THIS ONE I NEED HELP ON Express ...

**health**

How might the increase in medical technology have a negative effect on communication among providers? Provide at least two examples. Are there any positive effects of increased technology on communication among providers? Why or why not? How does the increase in medical ...

**health**

How might the increase in medical technology have a negative effect on communication among providers? Provide at least two examples. Are there any positive effects of increased technology on communication among providers? Why or why not? How does the increase in medical ...

**com**

Can you please identify the adverbs and adjectives in the following paragraph. Having credit cards could get some people into serious debt. I had a credit card at one time. I learned the hard way about using credit cards. I was using it for anything and everything that I ...

**art**

Sato

**Calculus**

Differentiate the following function? g(x)=x^2=1/x^2-1

**Algebra II**

Translate this equasion 2 units left and 4 units up: 9x^2+ 3x+ 10= 16y^2+ 154+ 3x please show me all of the steps. thank you

**Chemistry**

A 15.5 mL sample of 0.215 M KOH solution requires 21.2 mL of acetic acid in a titration experiment. Calculate the molarity of the acetic acid solution. Please show all steps, I don't understand this.

**Chemistry**

If 15.omL of 0.0250 M aqueous H2SO4 is required to neutralize 10.0 mL of aqueous solution of KOH, what is the molarity of the KOH solution?

**Human Relations Part 1**

Strong feelings

**algebra**

Determine whether -4 is a solution of the inequality x>-4 Is -4 a solution?

**Management**

The business I choose to do my SWOT Analysis on is Infinite learning Childcare Center. The five resources I used to obtain my information on the business strength, weakness, opportunities, and threats, are parent surveys, the company’s handbook, employee’s, ODJFS web...

**chemistry**

12.1

**General - URGENT**

I have found the cartoon on a website, but not the original details. It says LEV HAUS, do not trust the Kulak he is the enemy of socialism in the caption.

**General - URGENT**

Hi Theres this cartoon, it says: Kulak je nejzavilejsi nepritel socialismu. It shows a small fat man lifting up the cheek of a taller man as if he likes him. The shadow shows the fat man chocking the thin man and instead of a torch/candle behind him he is carrying a knife ...

**Reseach - source evaluation HELP**

Okay, I'll try contacting them. When I research George Beers I keep getting a hockey player or a dude who was dead before Stalin was alive!

**english**

huh? By the South African revolution do you mean the overthrow of the aprtheid regime? Explain 'customs'. Is it border control or cultural activities?

**Easy maths question**

Thanks!

**Easy maths question**

Hey How do I convert 1224.78m squared into mm squared?

**Current Events**

Hey! Kayz, so regarding the stance 'that the US should remove political, social and economic support from dictatorships'. So far I'm thinking of adapting the sanctions on South Africa during apartheid for this. I'm also thinking of looking at current ...

**grammar**

What is the question?

**English**

No. See you're describing something right? In each of those sentances. If someone was listening to you, would you rattle off a list of things that could happen? NO! You would draw ther attention to one thing that occurs ie superman can run faster than a speeding bullet ...

**English**

I'll give some examples.. 8- Smart people learn from their own mistakse but the smartest people learn from the mistakes of others. 7- When driving, drivers should not only refrain from using mobile phones but also refrain from eating and drinking or fiddling with radio ...

**Math - doing something wrong somewhere**

Okay, am I doing my conversions wrong?

**Chemistry**

You have 3.00 L of a 2.37 M solution of NaCl(aq) called solution A. You also have 2.00 L of a 2.00 M solution of AgNO3(aq) called solution B. You mix these solutions together, making solution C. Calculate the concentration (in M) of Na+ ions in solution C.

**chemistry**

Data: freezing point of pure cyclohexane: 6.0 degrees celcius Freezing point of unknown soluton: 1.6 degrees celcius weight of cyclohexane: 40.0231g=0.0400231 kg weight of unknown solute: 0.4872 g K_f_ of cyclohexane: -20.00 degrees Celciusx kg/mole questions: 1. what is the ...

**chemistry, please help!**

Given: 1. Mass of oxalic acid + weighing paper 2.0355g 2. Mass of weighing paper 0.5219 g 3.volume of oxalic acid solution 250 mL 5. Volume of oxalic acid used in titration trial 1: 15.o mL Trial 2: 15.0 mL 6. Volume of NaOH solution used in titration: Trial 1: 12.1 mL trial 2...

**chemistry**

To what volume must a solution of 83.1 g H2SO4 in 505.3 mL of solution be diluted to give a 0.28 M solution? I do not understand this problem. Also as a hint the professor said to use M1V1= M2V2.

**chemistry**

molarity = moles solute / L solution Convert g to moles: 23g NaCL x 1 mol/58.44 g NacL = 0.394 mol Convert ML to Liter: 500 mL x 1 L /1000 mL = 0.5 L Therefore... M= 0.394 mol/0.5L = 0.788 Molarity.. should be the right answer

**Please HELP CHEM**

How many grams of CaCl2 would be required to be added to water to prepare 1liter (1000ml) of a 1.72% (w/v) aqueous solution of CaCl2?

**Math**

Alright let friend one be represented by x, freind two by y and friend three by z. So 17feet 8 inches needs to be converted. Write out all that you know in algebra formulas. x+y+z= x= y= z= and solve. Or just use the first formula and solve for each value by inserting the ...

**Math calculus-Trig**

Find the area bounded by the curve and the lines y = -x^2 - 4x; y = 1; x = -3; x = 1

**Math**

Explain why the vertices of a solution region are important when using linear systems of inequalities for optimization problems ?

**Math**

A round 12-inch woofer is mounted to the bottom of a rectangular speaker enclosure with an inner width measurement of 12 inches. How far from corner A is the center, O, of the woofer?

**algebra**

Simplify this expression. If the answer contains exponents, all exponents should be positive. t 9 (t 6 ) 4

**world history**

neanderthals lived near homo sapians for thousands of years

**algebra**

What is the distibutive property to multiply using this equation? 12(u+v)

**algebra**

5/16 + 3/24

**chemistry**

In calibrating a thermometer by setting only the freezing and boiling points, what assumptions are you making regarding the internal diameter of the thermometer and the expansion of alcohol?

**chemistry**

In calibrating a thermometer by setting only the freezing and boiling points, what assumptions are you making regarding the internal diameter of the thermometer and the expansion of alcohol?

**statistics**

Is it ever inappropriate to report the mean? If so, when?

**math**

find mass of 2.7 grams of aluminum if volume is 1 cubic meters

**math**

find mass of 2.7 grams of aluminum if mass is 1 cubic meters

**ENG 121**

what are some examples of similarities and differeces in working mothers vs stay at home mothers?

**marketing**

discuss the legal and ethical implications that could affect the marketing process with nutrition life cycle of school age children

**Math**

Sketch the graph of a function f that satisfies all the following conditions. (a) f(0)=0,f'=1 (b) f''(x)>0 for x<0, f''<0 for x>0

**Math**

Find the vertical and horizontal asymtotes of y=1/x^2+6x+9

**Math ( calculas)**

find the intervals on which the curve y=x/(x+1)^2 is concave upward or concave downward.

**Math**

Rchel has 14 red, 9 blue, and one yellow towel. In haw many ways can the towels be arranged if the towels of the same colour must be side by side?

**chemistry**

The electron in a hydrogen atom is excited and makes a transition from n=2 to n=7 a. calculate the energy of the photon absorbed in joules. b. calculate the wavelength of the photon in meters HOW DO I DO THIS?

**Chem**

what occurs during the reaction below 4Hcl+MnO2-->MnCl2+2H2O+Cl2 1.the manganese is reduced and its oxidation number changes from +4 to +2. 2.the manganese is oxidized and its oxidation number changes from +4 to +2. 3.the manganese is reduced and its oxidation number ...

**Elements of Statistics**

the world health organization's center of aids research is planning to write a report on aids infection among drug users all of the world. in a recent study conducted on 1,000,000 drug users, 52% indicated that they are using heroin on regular basis, 37% indicated that ...

**Chemistry (organic)**

compound x C29H48BrCl reacts with excess H2/pd to give C29H56BrCl. How many double bonds and how many rings are in X?

**math**

How do the 2000 and 20pyg cancel out...the first pyg is still there?

**math**

(Px – 20) (100 – 2 Px + Pyg) Differentiating with respect to P we get 100 – 4Px + Pyg + 40 = 0 I don't understand how this is calc... whenever I multiply through and take the deriv I get another answer. Do you first multiply Px through then 20??

**chemistry**

CH3C (triple bond) CH 1.BH3, THF ----> 2.H2O2, -OH ---> Na, NH3----> 1.Hg(OAc)2,H2O--->

**8th grade honors english**

How do I properly site sources on my research paper?

**calculus**

Consider the solid obtained by rotating the region bounded by the given curves about the x-axis. y = 9 - 9x^2 , y = 0 Find the volume V of this solid. Sketch the region, the solid, and a typical disk or washer. Any help or tips would be greatly appreciated; not sure how to ...

**Math**

There are two flavors; vanilla and chocolate.

**Math**

There are 256 students in this outstanding 7th grade class. How many scoops of ice cream would have to be used in each cone in order to make a different cone for each person?

**math**

The rule is to multiply by 1/4. 2 x 1/4 = 1/2 3 x 1/4 = 3/4 5/6 x 1/4 = 5/24 2/3 x 1/4 = 1/6

**math**

n = -4 or 4 (-4)^2-16=0 -4 x -4 = 16, so 16-16 = 0 or 4 x 4 = 16, so 16-16 = 0

**psy**

Learning the skills to achieve your financial long term goals will help you to be a more responsible adult.

**English**

In general, which skills, tasks, and academic areas tend to come more easily to you? Which require more focus and effort and present more of a challenge?

**Physical Science**

A stationary but moveable 450-kg cannon is fired and the 12-kg cannonball moves off to the right with a velocity of 20.0 m/s. What is the connon's velocity (both magnitude and direction) due to the kickback from the firing?

**physical science**

What numbers go where on the formula? I am sorry I just don't get it.

**physical science**

Two 5.0kg rocks are 0.20m apart. What is the magnitude of the gravitational attraction between the rocks?

**Physical Science**

If a 2.0kg object is initially moving with a speed of 10 m/s and a 6.0 N force were applied in the direction of the motion, what would be the acceleration?

**Unix Shell script**

Shell script Using "if" statement checks for a file called "student.txt" in the current directory. Removes (deletes) the file if it exist. This file will collect last name, first name, and grade for 5 people. Use a while loop to get the information (last ...

**Unix Script**

"Using "if" statement checks for a file called "student.txt" in the current directory. Removes (deletes) the file if it exist. This file will collect last name, first name, and grade for 5 people. Use a while loop to get the information (last name, ...

**comsumer math**

victoria has a total of twenty-four nickles and quarters. she has ten more quarters than nickles.how much money does she have?

**Science**

the water and waste materials we washed down toilets and sinks are called: A. pesticides B. sewage C. industrial chemicals D. fertilizer

**Organic Chem**

Is it possible to obtain pure (200- proof) ethanol using fractional distillation from a fermentation mixture that contains equal amounts of water and ethanol? why or why not?

**Physics**

A loudspeaker of mass 25.0 kg is suspended a distance of 1.00 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of 2.50 m . What is the tension in each of the cables?

**accounting**

debit accounts recievable for 9000 credit sales revenue 9000 debit cash 2500 credit accounts recievable 2500

**Chemistry**

which of the following is insoluble ? (1)calcium chloride (2)ammonium phosphate (3)barium sulfate (4)potassium chromate so its 3 ?

**Chemistry**

Draw the lewis dot structure showing what happens during the reaction Lithium and Chlorine produce Lithium Chloride. how do you draw this, please help .

**chem**

what happens when NaCl(s) is dissolved in water? (1)Cl-ions are attracted to the oxygen atoms of the water (2)Cl-ions are attracted to the hydrogen atoms of the water. (3)Na+ions are attracted to the hydrogen atoms of the water. (4)no attractions are involved; the crystal just...

**algebre**

a flower bed is the shape of a triangle with one side twice the length of the shortest side and the third side is 30 ft more than the shortest side. find the dimentions if the perimeter is 102 ft.

**Chemistry**

what happens when NaCl(s) is dissolved in water? (1)Cl-ions are attracted to the oxygen atoms of the water (2)Cl-ions are attracted to the hydrogen atoms of the water. (3)Na+ions are attracted to the hydrogen atoms of the water. (4)no attractions are involved; the crystal just...

**Immediate accounting**

debit cash 1600 credit prepaid rent 1600 after 1st month of rent is used up u have to expense it debit prepaid rent 400 credit rent expense 400

**chemistry**

how to convert 4.8x10^5 hL to ml?

**Math 156**

If a figure has two right angles, then it is a rectangle? I said that the figure is in not a rectangle if it has two right angles, because a rectangle has four right sides.

**Bus Ops**

Is the set up times relevant to the production time and how does it affect the due dates when using each rule?

**Business**

Which of the following is NOT an example of parallel structure? "Yoga can help you develop flexibility, reduce stress, and increase relaxation." "Learn how to analyze business audiences, improve your style, and edit thoroughly." "You are all encouraged...

**HCS/335**

so how can i strech that into 3 hundred words??

**HCS/335**

Are laws and regulations the problem or the solution in addressing ethical problems? Explain. What would be an alternative?

**fractions**

what is 2/3 of 180/3

**finance**

A work at home oppurtunity is available in which you will receive 3 % of sales for customers you refer.The franchise fee is $ 840.00.How much will your customers have to buy to cover the cost?

**finance**

Richard likes the car price of $10,000 but financing through the dealer is no bargain.He has $2,000 for a down payment,so he needs $8,000 for the loan.Richard borrows $8000 for a period of four years at an add on intrest rate of 11 %.What is the total intrest on the loan?What ...

**finance**

a $200 cash advance by using checks linked to to her credit card account.The bank charges a 2 % cash advance fee on the amount borrowed and offers no grace period on cah advances.Sidney paid the balance in full when the bill arrived.What was the cash advance fee? What was the ...

**finance**

what is the interest and cost on a 6 month loan of $1,500 at13.2% simple annual intrest

**physics**

A body is dropped from a height of 10 meters on Earth and hits the ground with a certain velocity. The body is then taken to the moon, which has a gravitational constant that is 1/6th the value as compared to Earth. It is dropped from the same height, hitting the ground with a...

**organic chemistry**

What volume of physiological saline solution (90% by weight NaCl, in water) would give you a gram of salt when evaporated?