# Posts by nick

Total # Posts: 1,334

**Chemistry**

In an experiment, 95.0 mL of 0.225 M silver nitrate was mixed rapidly with 47.5 mL of 0.225 M calcium chloride in a coffee cup calorimeter. If a reaction occurred, was it exothermic or endothermic? If the reaction started at 23.7 °C, what is the final temperature of the ...

**Math**

In the early months of some year, one site added 0.5 million new accounts every day. At this rate, how many days would be needed to add 40 million new accounts?

**Math**

A car has a fuel efficiency of 33 miled per gallon.(a) Find a function G that calculates the number of gallons required to travel x miles. (b)If the cost of gas is $4 per gallon, find the function C that calculates the cost of fuel to travel x miles.

**Sociology**

How would a conflict theorist analyze the attitude about the feminist perspective?

**chem**

1m^3= cm^3 is it 1000000cm^3?

**Physics 1**

its 0.5 seconds nvm

**Physics 1**

no my bad its 30 seconds.

**Physics 1**

.50seconds

**algebra**

Mark, Tony, and Grant decided to eat a 72-inch sub in one sitting. They divided it so that Tony (the big eater) would eat 8 inches less than triple what Mark would eat. That left Grant with a portion that was 5 inches longer than Mark's portion. How big was each person'...

**math**

find the reference angle, quadrant, and rotational angle for the point (3,-8)

**calc**

can you just answer my question?

**Phase Transformation**

Concentration vs Distance plots resemble _____________ . Lognormal distribution Binomial distribution Lorentzian distribution Gaussian distribution

**Phase Transformation**

Change in Gibbs free energy is _____ related to interfacial energy and _____ related to radius of precipitate. directly, inversely inversely, directly directly, directly inversely, inversely

**Phase Transformation**

Which of the following phase diagram shows liquid immiscibility ? Eutectic Peritectic Monotectic Eutectoid None of these

**statistics**

5/8

**history**

Explain how the Lend/Lease Act meant that the United States really wasn't being "neutral" before they joined WWII.

**Math**

MIKE has a dog pen with an area of 120 sq. Feet. What is its width?

**Math**

What is 7/2 into a proper fraction?

**Statistics **

The correlation coefficient between X and Y is the same as the correlation coefficient between Y and X. True - If you were to find the correlation coefficient with a given data set for x and y, it would have the same correlation coefficient value as y and x. Can you check if ...

**Chemistry**

What volume will 11.2 grams of H2 gas occupy at 25.1oC and a pressure of 758 mmHg?

**Genetics**

Alkaptonuria is a recessive trait. If tow parents are carriers(heterozygous, unaffected), what is the chance they would have: A. 2 children, both with alkaptonuria? B. 3 children, all 3 not having alkaptonuria? C. 5 children, the first 3 not having alkaptonuria and the last 2 ...

**Math**

Lisa is running around the circular track x^2+y^2=10000, whose radius is 100 meters, at 4 meters per second. She starts at point (100,0) and runs in the counterclockwise direction. After 30 minutes of running, what are her coordinates?

**Math**

Using suffix notation and the summation convention, prove that u.del*u= w x u+ del(1/2q^2) where w= del x u and q= /u/?

**Math (Tensor Notation)**

Using suffix notation and the summation convention prove that u.del(u)= w x u + del(1/2q^2) where w= del x u and q=/u/

**stats**

Industry standards suggest that 18% of new vehicles require warranty service within the first year. Jones Nissan, sold 11 Nissans yesterday What is the probability that less than three of these vehicles require warranty service?

**Math**

I need help solving equation it says to round to the neatest hundredth if needed the problem is 9- 6(1-5a)=-26

**pre calc**

-1less or equal to x less then 4, state raltion represented by y=[2x]+1 by listing ordered pairs

**Calculus**

the sum of three positive numbers is 40. The first plus three times the second plus four times the third add up to 80. Select the numbers so that the product of all three is as large as possible.

**Physics**

A tension spring opposes being stretched, but offers no resistance to being compressed (think of a slinky!). A tension spring, with an equilibrium length of 1.25 m, is suspended by one end from a ceiling at a height of 2.5 m above the ground; a mass of 100 g is attached to the...

**calculus**

A rectangular poster is to have 50 squared inches for printed matter. It is to have a 1? inch. margin on each side and a 2? inch. margin at the top and bottom. Find the dimensions of the poster so that the amount of paper used is minimized. Horizonatal width= Vertical Height=

**math**

A rectangular poster is to have 50 squared inches for printed matter. It is to have a 1? inch. margin on each side and a 2? inch. margin at the top and bottom. Find the dimensions of the poster so that the amount of paper used is minimized. Horizonatal width= Vertical Height=

**Physics**

A car is proceeding at a speed of 14.0 m/s when it collides with a stationary car in front. During the collision, the fist car moves a distance of 0.350 m as it comes to a stop. The driver is wearing her seat belt, so she remains in her seat during the collision. The driver&#...

**Science**

Help pzzzzzz Sound in an empty room can be very loud,with many echoes.Describe three ways to make the room quieter?

**Algebra 2**

By graphing the system of constraints, find the values of x and y that maximize the objective function. 2x+y<=300 x+y<=200 x=>0 y=>0 maximum for p=x+2y

**maa central**

a set is composed of marbles with different colors, namely: 5 blue marbles, 3 red marbles and 2 gren marbles.What is the fractional form of blue marbles?

**Language Arts**

your wrong i got 60

**Math**

If there are 35 kids in a class and 22 are girls what is the ratio of girls to boys in the class

**Math**

3. (2.56 x 10^6) x (3.56 x 10^2) = a. 9.1136 x 10^12 b. 91.136 x 10^8 c. 9.1136 x 10^8 d. 91.136 x 10^12 4. In a recent year, the population of California was about 2.52 x 10^7 people. Its land area is about 4.05 x 10^5 km2. What was the average number of people per square ...

**math**

Find the angle of depression from the top of a lighthouse 191 feet above the water level to the water line of a ship 4 miles offshore.

**chemistry**

Gold has a latent heat fusion of 64.5 J/g. How much energy is required to melt 20.0 g of gold?

**chemistry**

Ethyl alcohol has a heat of vaporization of 850. J/g. What mass of ethyl alcohol can be boiled using 15000 J of energy?

**chemistry**

A student melts 50.0 grams of ice using 16650 J of energy. What is the heat of fusion of ice?

**American History**

Hello there! I believe the answer is, B! Hope I helped, join me on Brainly(dot)com

**physics (super hard)**

a carnival ride is designed with seats that carry two people weighing 910.0 N each. the seats itself weights 630 N.each seat is connected to central spindle by one chain and rotates on a radios of 6.07 meters. the ride is designed to rotate fast enough that the seats swing out...

**physics**

a grandfather clock is designed to have a pendulum which swings a mass at the end of the chain in a horizontal circular motion. the pendulum is designed to swing 7 degrees off of the vertical. the chain is 1.50 meters long and the maximum tension in the chain is 12.0 N. ...

**physics**

an 85kg concrete block rests on a flat surface with coefficient of static friction us=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block? please help and show work

**physics**

helpppp

**physics**

determine the minimum radios of a highway curve which has banking angle of 5.74% over which vehicles will travel at 110km/h. assume that there is no friction between the road and the tires. calculate the radios?

**physical**

=16*15 = 240

**math**

Five years after purchase, a machine has a value of $300. The depreciation rate is 26% per year. Calculate the value of the machine when it was bought five years ago.?

**math**

One sign blinks every 9 seconds. The other sign blinks every 15 seconds. In how many seconds will they blink together again

**Math**

The minute hand of a colck is 10cm long.How far does the minute hand move in 1 hour?

**Algebra Word promblems**

Use linear calculator

**math**

Use an integer to represent the change in the airplane's height. An airplane descends 5,000 feet.

**math**

use an integer to represent the change in the airplanes height.an airplane descends 5,000 feet.

**math**

The first one is C. Im pretty sure.

**Math**

What is the perimeter in meters of a rectangle that is 13 meters long and 10 meters wide

**pysics**

550 g of water (cw = 4186 J/kg.K) at 75°C is poured into an 855 g aluminum (cw =900 J/kg.K) container with an initial temperature of 11°C. What is the final temperature of the system, assuming no heat is exchanged with the surroundings? Select one: a. 75 °C b. 59 &...

**Building Traded**

On a print with a scale of 1/2=1FOOT HOW much would a 20 ft hallway be in inches?

**History**

true

**mental math**

if 600 divde 6 =100 then 602 divde 6 = n

**Statistics**

Listed below are body temperatures for four subjects measured at two different times in a day. Body Temperature (°𝐹) 𝑎𝑡 6 𝑎𝑚: 98.0,97.0,98.6,97.4 Body Temperature (°𝐹) 𝑎𝑡 6 𝑝𝑚: 98.0,97.6,98...

**Stastics**

The UMUC bookstore states the average textbook costs $119. A randomly selected sample of 26 new textbooks at the UMUC bookstore had a mean price of $123.45 and sample standard deviation of $15.23. Use a 0.05 significance level to test the claim that the mean price of textbooks...

**science (URGENT!! CORRECT PLEASE))**

thanks 100%

**Math**

If an oval is 225 yards how many feet of fence go around it fence is sold by foot how o I figure it out

**chemistry**

dHf=-99.4 kJ/mol (AgNO3) dHf= -795.0 kJ/mol (CaCl2) Got these from the sheet

**Language arts unit 3 lesson 5 second read**

Jesus Christ you guys sure are thick.. Do your work next time!

**Math**

How many apples will it take to get 27kg 8 divided by ? equals 27kg

**Physics**

A man completes 31 lengths of a 50 metre pool with an average speed of 0.9 km/h. What is the magnitude of his average velocity vector in Standard SI units?

**Math**

What is the rate of the current if a canoe travels 22mph

**Chemistry**

Using your knowledge of chemical migration, outline the two most possible chemical migration pathways for non-polar C9H12 that has been spilled onto an open field on a warm spring day.

**Physical Education**

Definitely C.

**Math**

In the questions below P(x,y) means “x and y are real numbers such that x + 2y = 5”. a) Determine whether the statement ∃x∀yP(x,y) is true. b) Negate the statement ∃x∀yP(x,y).

**math**

if don gecewicz invested $6000 at 8% interest compounded quarterly, find the amount after 7 years

**Grade 8 Art**

that is all right got 100%

**Physics**

The figure shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 93.4 N on the wall to which it is attached. The tensions in the shorter cords are T1 = 61.4 N, T2 = 41.5 N, and...

**Math**

You live 2 3/4 miles from school. In the morning, you walk 1/3 mile directly toward school to the bus stop. Later, when you get off the bus, you walk home the same distance. How many miles do you ride to and from school each day?

**Health**

Mac N is right! i got a 9/10 but only cuz i put down the wrong answer for

**Math**

Use the distributive property to solve the equation 8+1/7x=9.

**physics**

A piece of luggage is being loaded onto an airplane by way of an inclined conveyor belt. The bag, which has a mass of 15.0 kg, travels 4.50 m up the conveyor belt at a constant speed without slipping. If the conveyor belt is inclined at a 30.0° angle, calculate the work ...

**Math plz help someone.**

rosa quilts a square rug that has an area of 400 square inches. what is the length on each side of the rug? A. 14 B.16 C.18 D.20

**math**

Elaine is making a model of a house that she designed. She wants to put wood molding around two rooms in the model. She measures and finds that she needs feet of molding for one room and feet of molding for the other room. She has feet of molding

**Chemistry**

Would you expect H 2 SO 3 to be oxidized to H 2 SO 4 in our natural environment? Please explain using the molecules in our environment and the concept of oxidation states.

**Grade 11 Functions**

P(x)=6x-x^2/100 - 50+3x P(x)=-x^2/100 + 3x-50 a=-x^2/100 b=3x c=50 h= -b/2a h= -3/2(1^2/100) h= -3/0.02 h= -150 aka positive 150 when graphed.

**maths**

y=3ln5t/2cos2t

**Math**

Kenny wants to invest $250 every three months at 5.2%/a compounded quarterly. He would like to have at least $6500 at the end of his investment. How long will he need to make a regular payments? *PLEASE SHOW WORK*

**Math**

What are the correct answers??

**math**

when 4 times a number n is decreased by 3 its at most 21

**Health**

{1} which is the best example of a win-win situation. A. One side gets what it wants.... B. Both sides get what they want but one side get more.... C equal need are met for both sides....D neither side get what it wants. I think C is the answer. {2} A person understands how ...

**Business**

Tina borrowed some money at 6% simple interest and paid it back exactly seven years later by making a single payment of $4544. How much did she borrow in the first place?

**Math**

No I want to know the answer cuz I don't know it😔😓👍

**Math**

What is {23%,0.21,1/4,1/5} from least to greatest I need the answer today please thank you

**Biology :)**

oxygen in the solution will naturally diffuse into the cell.

**Algebra**

40

**Math**

If a 14-ft ladder leans against a building, with an angle of elevation of 70°, how far up the building will the ladder reach? I believe this requires law of cosines but otherwise I am lost.

**physics**

That is wrong

**Trigonometry**

Wait, I think I figured it out. Does p=40 a=20 c=80 sound right?

**Trigonometry**

I must be doing something wrong because I keep coming out to big fractions with variables left over. I need another hint here. Am I supposed to have fractions in my answers?

**Trigonometry**

Added info: I know that I need a system of three equations to solve for my three unknowns, I just can't figure out those equations. I really need help!

**Trigonometry**

Peanuts cost $3 per pound, almonds $4 per pound, and cashews $8 per pound. How many pounds of each should be mixed to produce 140 pounds of a nut assortment that cost $6 per pound, in which there are twice as many peanuts as almonds?