# Posts by D

Total # Posts: 411

**Physics**

A train at a constant 44.0 km/h moves east for 42 min, then in a direction 45.0° east of due north for 17.0 min, and then west for 51.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and west of north negative) of ...

**physic**

f(t)=ct

**physics**

A 5.9-kg rock and a 3.0 10-4-kg pebble are held near the surface of the earth. (a) Determine the magnitude of the gravitational force exerted on each by the earth.(b) Calculate the magnitude of the acceleration of each object when released.

**Algebra,Geometry**

You could actually set "X"=0 to find Y, and then plug in a "0" for Y to get X.

**Math**

Thank you!

**Math**

I think. I am honestly not sure what to do.

**Math**

The volleyball court -if it id 80 ft long and 50 ft wide, how would you find the dimensions of the court? Explain please! Remember that I am a 6th grader. Please don't give me a 10-12th grade answer.

**grade 9 science**

a student wants to estimate the population size and density of birch trees in a woodlot measuring 100 m by 100 m. On a diagram of the woodlot, she splits the area into a 10 by 10 grid and randomly selects 10 sample quadrants - (0,0), (1,4), (2,6), (3,9), (4,3), (5,5), (6,1), (...

**d**

the school auditorium has 8 rows of seats, divided in three rows. Each section has 15 seats. How many seats are there in total?

**ENGLISH**

Anne Bradstreet was never married A poems cadence, pace, or ongoing momentum aa,bb,cc,dd,ee,ff,gg Seven The writer greatly respects her father and the way he has raised her A coin of little value 6/6 100%👌🏽

**health**

The lower thigh muscles are rectus femoris, vastus lateralis and medialis. Located in the back of your leg are the hamstrings. These muscles help you run, jump, and walk!

**Macroeconomics**

D Marginal Cost

**physics**

60

**statistics**

In a survey of 400 college students, 40 were left-handed. Treating the sample as if it were random and using 0.015 as the standard deviation of the sampling distribution of the sample proportion, what is the lower bound of a 95% confidence interval for the population proportion?

**marketing**

Unit 5 Individual Project Deliverable Length: 4-5 body pages, 1 PERT chart, 1 Gantt chart Details: Using your current work organization (or an organization of interest) as the subject matter, research the elements of business and prepare an APA formatted paper that: Analyzes ...

**Calculus**

2) 2*x*e^(-4) 3) 2*x*e^(sin(x))+x^2*cos(x)*e^(sin(x)) 1) e^(x)*sin(x)^2+2*e^(x)*sin(x)*cos(x)

**maths**

a) 1/6,1/7,1/8,...

**Science**

idk!!

**simple subject**

What is the simple subject in: The black and white Schnauzer barked all day long.

**math**

0.009615

**chemistry**

Yeah volumes at the bottom of the page are switched

**biology**

Why is a denaturing solution used in the Southern blotting technique?

**physics**

DOnt know

**chemistry**

32.2

**math**

how many line segments are in the word FAME?

**physics**

278

**algebra**

how do you solve -x+2y=2

**Physics C**

A point charge of 5.5 µC is located at the center of a spherical shell of radius 30 cm, which has a charge −5.5 µC uniformly distributed on its surface. Given: ke = 8.98755 × 10^9 Find the electric ﬁeld for a point inside the shell a distance 12 ...

**World Civ**

What were the social and administrative foundations of the absolute power of Ming Quing emperors?

**World Civ**

What were the social and administrative foundations of the absolute power of Ming Quing emperors?

**World Civ**

How did advances in military technology change warfare in 16th century Japan? How was the strategic balance of power reflected in the government created by Tokugawa leyasu?

**World Civ**

Why were so many people living in the European countryside dependent on aristocracy? (during and before the agricultural revolution in Europe)

**geometry**

Quadrilateral QRST is a square. If the measure of QR is 3x – 6 and TS is 6 - x. Find the area of the square.

**english**

Actually, can you just post your email address, and then we can figure stuff out through email?

**english**

When you get the answers to the final....please post them!

**english**

Explain your changes?

**home economics**

When were the Home Economics Courses dropped or greatly reduced by the school system in Ontario.

**Calculus 1**

If you have 280 meters of fencing and want to enclose a rectangular area up against a long, straight wall, what is the largest area you can enclose?

**Physics**

Air in a balloon does 25 J of work while absorbing 81 J of heat. What is the change in internal energy?

**Romana**

Forta in Fizica este considerata o frecare intre doua sau mai multe obiecte in contact. Cine stie ce problema va fi cu viteza celor trei obiecte... Un fermier utilizeaza un tractor mare, ea poate sa areze un teren in opt ore. Tatal-ui meu ii ia trei ore sa areze terenul nostru...

**Ashford**

Beth gives Megan $2 allowance a week. Then she takes Megan shopping and allows her to select what she wants to buy. If the item desired costs more than $2, Megan's mother suggests she save her money until she has enough saved to pay for the desired item. When Megan ...

**Maths Grade 8**

fart

**Algebra**

Rewrite -81/(-88) as multipulcation

**Algebra**

whats the answer for 14(3-7x)=-(9+2x) with simple steps on how to do it

**specific heat capacity**

figured it out.

**specific heat capacity**

How much heat would be required to heat 1 gram of pure liquid water from 10C to 20C? How would i approach this problem?

**math**

how do yo convert the ratio 120:200 to a fraction in simpliest form

**Math**

Jake says that adding 0 does not change a sum. Is he correct? explain.

**Chemistry**

662.5

**Math**

Ms. Poole, my PE teacher, asked the 100 seventh in my school if they could swim. Half the boys and two thirds of the girls said yes. Seventeen boys said no. How many seventh graders know how to swim?

**Chemistry**

When 1.0 g of gasoline burns, it releases 11 kcal of heat. The density of gasoline is 0.74 g/mL a) How many megajoules are released when 3.0 of gasoline burns? b) If a television requires 150 kJ/h to run, how many hours can the television run on the energy provided by 3.0 gal ...

**chemistry**

When 1.0 g of gasoline burns, it releases 11 kcal of heat. The density of gasoline is 0.74 g/mL a) How many megajoules are released when 3.0 of gasoline burns? b) If a television requires 150 kJ/h to run, how many hours can the television run on the energy provided by 3.0 gal ...

**american history**

what is one reason colonist came to america

**Chemistry**

A sample of 0.43 moles of a metal M reacts completely with excess chlorine to form 18.23 grams of MCl. How many moles of Cl are in the sample of MCl that forms?

**criminal law**

thank you Ms. sue

**criminal law**

Describe current parole and mandatory release policies

**math**

Simplify: (3-7x)/8+(2x+3)/8

**geometry**

Given the quadrilateral ABCD with the following vertices A(-4, 0), B(10, 0), C(10, 10), and D(0, 14), find its area.

**geometry**

Consider the following. newskills15 Solve for BC (the the nearest hundredth).

**Precalculus**

Consider the following. f\(x\) = 5tan(1/3 x + pi/2) The period of the function above is ...

**geometry**

In ΔABC, angleB = 46°, angleC = 28° and AB = 50. Find BC (to the nearest hundredth).

**chem**

calculate the amount of heat (kcal) released when 50.0 g of water at 100degrees Celsius hits the skin and cools to a body temperature of 37 degrees Celsius.

**chemistry**

calculate the volume of sulfur dioxide produced when 27.9 mL O2 reacts with carbon disulfide to produce carbon dioxide and sulfur dioxide at STP

**physics**

(c) Tube (c) is again filled with water. A1 and A2 are the same as in part (b). Two pistons apply different forces to the water in the tube so that the water in the right side of the tube is a height h = 0.43m above the height of the water in the left side of the tube. If F2...

**e-commerce**

The business plan should include the concepts and ideas covered during the past several weeks. The following points need to be addressed in your business plan for the establishment of an e-commerce site: The e-commerce infrastructure Marketing concepts for the e-commerce ...

**Finance**

62,025

**Math 116**

Use all available methods (in particular, the Conjugate Roots Theorm if applicable) to factor the polynomial function completely, making use of the given zero, f(x)=x^4+x^3+4x^2+196x-2205; -7i is a zero.

**calculus**

A missile is fired at an angle of 75 from the horizontal. At one point, its speed was 900 mph. Find its horizontal velocity in miles per minute

**math**

The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Explain your reasoning carefully. Hint: Assume...

**chem**

Magnesium burns in air to produce magnesium oxide, MgO, and magnesium nitride, Mg3N2. Magnesium nitride reacts with water to give ammonia. Mg3N2(s) + 6 H2O(l) → 3 Mg(OH)2(s) + 2 NH3(g) What volume of ammonia gas at 24°C and 753 mmHg will be produced from 4.46 g of ...

**Physics Mehanics**

A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it hits the floor, assuming that the end on the floor does not slip. (Hint: Consider the stick to be a thin rod and use the conservation of energy ...

**Physics Mehanics**

In the figure below, wheel A of radius rA = 11 cm is coupled by belt B to wheel C of radius rC = 23 cm. The angular speed of wheel A is increased from rest at a constant rate of 1.6 rad/s2. Find the time needed for wheel C to reach an angular speed of 110 rev/min, assuming the...

**Physics Mechanics**

Thanks a lot. Your answer are both right. Thank you so very much.

**Physics Mechanics**

Particle A and particle B are held together with a compressed spring between them. When they are released, the spring pushes them apart, and they then fly off in opposite directions, free of the spring. The mass of A is 3.00 times the mass of B, and the energy stored in the ...

**Physics Mechanics**

Thank you so much drwls. You're a life saver. Thanks a lot! :)

**Physics Mechanics**

A banked circular highway curve is designed for traffic moving at 57 km/h. The radius of the curve is 211 m. Traffic is moving along the highway at 48 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the ...

**Physics**

Suppose that the terminal speed of a particular sky diver is 170 km/h in the spread-eagle position and 315 km/h in the nosedive position. Assuming that the diver's drag coefficient C does not change from one position to the other, find the ratio of the effective cross-...

**Precalc**

Its #2 which is 3 because you add all the degrees of all the parenthesis and add them up and that's ur answer

**Science**

Its 133.88 degree Celsius.. Hope it helps :)

**Physics**

In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.5 kg book is pushed from rest through a distance of 0.87 m by the horizontal 25 N force from the broom and then has a speed of 1.58 m/s...

**Algerbra 1**

4.50

**Chem (but i think its physics)**

203lbs= 902.94N 110ft= 33.528m 902.94*33.528*3=90 822J 90822J* 1Calorie/(4184J) = 21.7

**Chem (but i think its physics)**

Ok so this problem appeared in my online chem homework, but it looks alot more like a physics problem. I have no idea how to do it A 203 lb man eats an order of French Fries consuming 250 Cal of food energy. Afterwards he feels guilty and decides to work off the excess ...

**8th grade science**

what voltage produces a current of 500 amps with a resistance of 50 ohms?

**Calculus**

fe

**chemistry**

Sorry Doc but the satallite is 30 miles above the earth and the question states there and back. please check again.

**Chemistry**

What is the molality of a solution of sucrose(molar mass=342) dissolved in water that is 25% sucrose by mass?

**chemistry**

Which of the following properties increase with increasing atomic number for fluorine and chlorine? I. melting point of the elements (yes) II. boiling point of the hydrogen halides i'm not sure about II because HF has the highest boiling point but fluorine and chloride fit...

**chemistry**

Which of the following properties increase with increasing atomic number for fluorine and chlorine? I. melting point of the elements (yes) II. boiling point of the hydrogen halides i'm not sure about II because HF has the highest boiling point but fluorine and chloride fit...

**chemistry**

At 100 degrees celsius, the ratio of the average kinetic energy of oxygen molecules, O2, to the average kinetic energy of methane molecules, CH4, is: A) 4:1 B) 1:4 C) 1:2 D) 1:1 I think it's D because the kelvin temperature is the same for both collection of gases, and ...

**physics**

at what angle with respect to the horizontal should the shot put be launched if the starting height is 2.0m to have the greatest range?

**12th grade**

Firm A offer 40,000 salary with $2,000 increase evey year. FIRM B offer 38,500 salary with 5% increse every year. After how many year he will make same money?

**Chemistry**

Before 1962,dimes minted in the US contained the precious metal silver.A 2.08 gram dime is dissolved in nitric acid and reacted with saturated sodium chloride solution. This process precipitates all the silver in the dime as 342mg of AgCl(s). How many moles of silver did the ...

**Chemistry**

Before 1962,dimes minted in the US contained the precious metal silver.A 2.08 gram dime is dissolved in nitric acid and reacted with saturated sodium chloride solution. This process precipitates all the silver in the dime as 342mg of AgCl(s). How many moles of silver did the ...

**earth**

A cold front traveling at an average speed of 35 km/h eastward is 280 km due west of you. Appoximately how long will it be before your location experiences a sudden temperature drop?

**Algebra**

120

**test**

235U 92

**Chemistry**

Example: 235U 92

**algebra**

how can 2 boys weighing 100lbs each and a man weighing 200lbs cross the river in a boat that only holds 200lbs safely?