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Assuming that the earth momentum is at a distance 3.82*10^8m away from the centre of the earth, calculate it's linear speed and it's period of orbit motion round the earth.

Why is it better to do three extractions with say 10mLs of each rather than one large extraction with 30 mLs of solvent?

1.50 grams of HNO3 is added to water to obtain a final volume of 700.0 ML. What is the final concentration of H+?

1.50 grams of HNO2 is added to water to obtain a final volume of 700.0 mL. What is the equilibrium concentration of H+? ka for HNO2= 4.6 x 10^-4 .

osmium os is the densest element known density 22.57 cm3 calculate the mass in grams of a cylinder of osmium with a height of 3.0cm and a diameter of 1.0cm?

if resource were infinitely abundant there will be no need to study economics.Discuss 3 to 4 pages

an object of mass 2kg moving with a velocity of 3ms collides head on with another object of mass 1kg moving in the opposite direction with a velocity of 4ms the object stick together after collision,calculate their common speed

Which of the following statement are True?1. If ( R, *_1 ,*_2) is a ring ,then psi : R ×R --> psi (r_1 , r_2) = r_1 *_2 r_1 is a binary operation?

Show that d : Q[x] / { 0} --> N union {0}: d(f) = 2 ^(deg f) is a Euclidean valuation on Q [x]?

Check whether f : (4 Z, +) --> (Z_4 , +) : f (4m) = bar m is a group of homomorphism or not.If it is, what does the Fundamental Theorem of Homomorphism gives us in this case? If f is not a Homomorphism, obtain the range of f ?

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No answers ... yet!

Jackson's age is 2/3 of peter's age. If peter's age is 63 years find age of Jackson.

Sir I've try to solve this question but I'm not confirm that is it right or wrong       Peter's age        = 63       Jackson's age ...

2 hours ago | Raza from New York, NY | 0 Answers | 0 Votes

Math Word Problem Please Solve

Susan C.

Gastonia, NC

A bicycle tire completes 9/10 of a revolution every 1/3 second. How many revolutions will the tire complete every minute? Show your work.

I need the work done for school.

yesterday | Caitlyn from North Bergen, NJ | 1 Answer | 0 Votes

Math Word Problem

Andrew M.

Palm Bay, FL

. Regina scored 84% on a test. She answered 63 items correctly. How many items did Regina answer incorrectly? 1 point

 I really have no idea what the heck to say but its fine ill just keep talking about random stuff like i thought my baby cousin how to walk.

33 minutes ago | Prince from Baldwin Park, CA | 1 Answer | 0 Votes

Math Word Problem

Andrew M.

Palm Bay, FL

each border is charged 3800 a month for board and lodging. If there are 12 boarders, how much will the owner of the boarding house earn in one half year?

Kindly show solution for the problem.

49 minutes ago | Jessalyn from Bethel, ME | 1 Answer | 0 Votes

Math Problem

Andrew M.

Palm Bay, FL

Archaeologists discovered that the 18th century garden of the Charles Carroll House in Annapolis Maryland was a right triangle. The long leg of the triangle was

Archaeologists discovered that the 18th century garden of the Charles Carroll House in Annapolis Maryland was a right triangle. The long leg of the triangle was formed by a 400ft. long sea wall. The...

1 hour ago | Patricia from Santa Rosa, CA | 1 Answer | 0 Votes

Pythagorean Theorem

Mark M.

Carson, CA

Can you use • in scientific notation?

            Hello, this question might not be worth your time but regardless, I'm going to still ask it. Recently, I had a test with exponents that wasn't hard for me...

6 hours ago | Fardeen from Arlington, VA | 2 Answers | 1 Vote

#scientificnotation #multiplicationNo answers ... yet!

A cat that was initially 12 kg reduces its weight by 10% each month. How long does it take for the cat to be at least 6 kg lighter than its original weight?

initially 12 kg reduces its weight by 10% each month

17 minutes ago | Clara from Lake Worth, FL | 0 Answers | 0 Votes

Word ProblemNo answers ... yet!

I need to find the diameter of a smaller circle J that is internally tangent to circle O and externally tangent to circle P and Q.

If circles P and Q are congruent and are internally tangent to circle O externally tangent to each other at point O. Circle J is internally tangent to circle O and externally tangent to both circle...

5 hours ago | Michelle from Chicago, IL | 0 Answers | 0 Votes

Pre-calculus Word ProblemsNo answers ... yet!

A science class has girls and boys in the seventh grade and girls and boys in the eighth grade. The teacher randomly selects a seventh grader and an ei

A science class has 3 girls and 7 boys in the seventh grade and 9 girls and 3 boys in the eighth grade. The teacher randomly selects a seventh grader and an eighth grader from the...

48 minutes ago | Melissa from Columbus, OH | 0 Answers | 0 Votes

Probability Of Independent EventsNo answers ... yet!

Calculate the Mean of X, Variance of X

If students scores X of 60% and 80% in an examination correspond to the standard scores of -0.58 and 1.42 respectively, Calculate the mean of X, the variance of X and the probability that a student...

28 minutes ago | Collins from New York, NY | 0 Answers | 0 Votes

Binomial DistributionNormal DistributionPoison Distribution

Andrew M.

Palm Bay, FL

A rectangular parking lot is 50ft longer than it is wide. Determine the dimensions of the parking lot if the diagonal distance from corner to corner of the lot

A rectangular parking lot is 50ft longer than it is wide. Determine the dimensions of the parking lot if the diagonal distance from corner to corner of the lot is 250ft.

2 hours ago | Patricia from Santa Rosa, CA | 1 Answer | 0 Votes

Pythagorean Theorem

Mark M.

Carson, CA

what is the sum of 19 but diffrence of 7?

19 - ? =7 7 + ? = 19

yesterday | Frfr from Richmond, VA | 1 Answer | 0 Votes

Love Dog

Ally L.

Lubbock, TX

If jack is 5 1/4 younger than Mike. Nate is 11 1/2 older than jack. To the nearest year, what is the difference in Mike age and Nate age?

need some help -_-

yesterday | Angel from Largo, FL | 1 Answer | 0 Votes

Math Word ProblemNo answers ... yet!

how many people in tunisia live in the sahara desert region?

I am learning about food security in Tunisia and need to see how many people are situated in the Sahara desert that live in Tunisia

1 hour ago | Sophie from New York, NY | 0 Answers | 0 Votes

TunisiaNo answers ... yet!

A rectangle lawn measures 60ft by 80ft. Part of the lawn is torn up to install a sidewalk of uniform width around it. The area of the new lawn is 2400 ft 2. How

A rectangle lawn measures 60ft by 80ft. Part of the lawn is torn up to install a sidewalk of uniform width around it. The area of the new lawn is 2400 ft 2. How wide is the sidewalk?

1 hour ago | Patricia from Santa Rosa, CA | 0 Answers | 0 Votes

Area Of RectangleNo answers ... yet!

How to minus 104-98. 6

Step of 104-98. 6

1 hour ago | Ansa from New York, NY | 0 Answers | 0 Votes

No answers ... yet!

Probability that a carton of six bottles will weight more than 7.4 kg

The weight of a bottle of red wine is normally distributed with mean 1.2 kg and standard deviation 200 g. Cartons that can hold six bottles have a mean weight of 20 g. The weight of the cartons is...

58 minutes ago | Asri from Lexington, KY | 0 Answers | 0 Votes

No answers ... yet!

I really am lost and need help!

Circle 1: center (8, 5) and radius 6 Circle 2: center (−2, 1) and radius 2 What transformations can be applied to Circle 1 to prove that the circles are similar? What scale factor does...

yesterday | Katie from Mount Vernon, OH | 0 Answers | 0 Votes

Circles

Arturo O.

Melbourne, FL

Write the slope intercept form of the equation of the line that passes through the point (2, -3) and (7, 10

I don't know how to do it

yesterday | Ty from Columbia, SC | 1 Answer | 0 Votes

GeometryNo answers ... yet!

Express the absolute uncertainty

Anna, Anh and Amir are each given a sample of an unknown polymer and asked to calculate the density of their sample to determine if it could be polyaniline. They find a published value for the density...

2 hours ago | John from New York, NY | 0 Answers | 0 Votes

Physics

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