# Posts by mariam

Total # Posts: 167

**math**

When a number is subtracted under the radical which way do you move the graph?

**math**

Why is there two different formulas, recursive and explicit. When do you use it?

**math**

I was just wondering, what is the difference between an arithmetic sequence and a geometric sequence?

**Physics**

A uniform metre rule is balanced at the 35cm mark when a mass of 500g is placed at the 20cm mark .determine the mass of the rule ..

**math**

It takes 8 hours for 5 people to paint a room. How long would it take 4 people?

**History**

What is fascism? Thank you!

**Health!**

Also, where are saddle joints located in my hand? Thanksss!

**Health!**

What motion does a saddle joint allow? What movement does a pivot joint allow? (please don't say pivotal) Thanks. :)

**Physics**

in this question we see that the only movement ( displacement/distance) that could be done was horizontal distance we started off with 4.80 m/s which was the initial velocity that the person was walking by, the person was walking by this velocity in a constant rate e then the ...

**physics**

vector A is 4.5 Km N, this means that for this vector we are not going to have an x- coordinate, we are only going to have a y- coordinate , since this vector is going N then the y- cordinate is postive number, and the y-coordinate for this vector will be + 4.5, while the x-...

**Math**

I am a seven digit number. I have the digit 3 in my ten thousands and tens places, and the digit 1 in all my other places. What number am I?

**math**

justin has a car that ca travel 77 1/2 miles with 3 1/10 gallons of gas. kim has a car that can travel 99 1/5 miles with 3 1/5 gallons of gas. How many miles can each person drive with one gallon of gas?

**science**

the picture shows a little palm tree with other big ones in a desert

**Math**

Which Polygon will Always Be Irregular? A.TRIANGLE B.TRAPEZOID C.SQUARE D.HEXAGON

**Algebra**

75% of the students on academic team earned 6 honors on the state examinations. the rest of the students on the team passed the state examinations. there were zero. if 30 students passed the ecam with honors, which proportion can be used to fun the total number of students who...

**Algebra**

a car rental company has two rates. The first rate is 45$ per day plus 29.5 cents per mile the second rare is 90$ per day plus 0.07 per mile. If you rented at the 90$ rate, how many miles you would need to drive to break even?

**chemistry**

A 20.00 g sample of metal is warmed to 165˚C in an oil bath. The sample is then transferred to a coffee cup calorimeter that contains 125.0 g of water at 5.0˚C. The ﬁnal temperature of the water is 8.8˚C. mrtal water m=20g m=125g t1=165c t1=5 c=? t2=8.8 c...

**math**

When MacNeil says that much of television news is “machine gunning with scraps,” he means that

**Social Studies**

What year was Jamestown settled? What were the settlers looking for initially? What guaranteed their success?

**chemistry**

How many liters of hydrogen gas are produced during an enthalpy change of -50kJ, assuming STP conditions? 1L= 1kg zn+ hno3 yields znn03 + 1/2 h2 +100kJ -50 kj x (1mol h2/ 100kj) X (2.02g / 1 mol) h2 ) = 1.01 g please help tried to get the answer but it it supposed to be 11.02 ...

**ela**

What are the advantages of living in the society of fahrenheit 451

**chemistry**

A solution of KOH is prepared by dissolving 2.00 g of KOH in water to a final volume of 250 ml of solution what volume of this solution will neutralize 20.0 ml of 0.115 mol/L sulfuric acid? amount of KOH= 2.00g(1mol of KOH/ 56.01g)= 0.357 moles concentration of KOH in water = ...

**Math**

How do you graph mixed fraction from a table on a coordinate plane ?? Thanks

**science**

How does molecules move throughout the water cycle? evaporation: They move freely in the air condensation:They lose energy and are cooled runoff; they move down to the water precipatation: they fall down to the earths surface im really not sure so if i have something wrong can...

**science**

im sorry but i am having trouble what type of insulation they use please help me..

**science**

Thank you so much i now understand what i have to do :)

**science**

science questions:Look around your house and make a list o different kinds of containers that use insulation to keep foods hot or cold. If possible, describe the type of insulators used in each container. I don't know which containers in my house that uses insulation. Can ...

**ela**

What were obstacles that Mo'ne Davis had to overcome?

**ela**

Can you explain why its a legacy?

**ela**

Is Anne Frank legacy her diary?

**Science**

What are some home appliances that can cause phase changes?

**science**

What can we learn from an experiment itself?

**Ela**

thanks :)

**Ela**

What are some reading strategies or tips I can use for the Ela state exam?

**ELA**

Thanks

**ELA**

So if they give me a sentence saying " Lightning danced across the sky", since lightning does not dance, that would be human quality which would make it personification right???

**ELA**

So I am studying for the Ela state exam and i am writing down some notes... but i am still not sure what does personification mean and what are the examples after searching online. Someone please tell me what does it mean...

**Ela**

Thank you again

**Ela**

I'm sorry, one more question. Is it a?

**Ela**

Thank you

**Ela**

Im not sure what the answer is #2 i was actually having trouble with that..

**Ela**

Can you check if my answers are correct because i am having trouble with it? The Kingdoms End I stand at the edge of the sea, watching waves wash onto the sand. White foams spills over my feet into the moat of an abandoned castle. The king and his court have gone away, leaving...

**math**

A rectangle has a length of 6x+3 units and a width of 8 units. Write a simplified expression for the area, in square units, of this rectangle. So, my answer was 9x+8 please tell me is this correct... Thank you

**math**

what are the procedures on how to measure the length of an object with a ruler?

**math, scale drawing**

36 ft

**Math**

How do you graph a function like y=2x+0.5 and y=0.5x+1?

**Math**

Please help

**Math**

I meant y=0.5x+1

**Math**

How can you graph y=2X +0.5 and y=0.5+1? Thank you

**algebra 2**

X.2 +8x +15/x+5

**math**

You do cross out the zero. To not get confuse place the decimal in the right place.

**earth science**

The active sections that are located along fault lines are called

**Physics**

a car starts rest at 2m/s at a uniform speed of 5m/s(square) what is the time interval?

**Physics**

AN astronaut on the Moon has a mass (including his spacesuit and equipment) of 180 kg. the acceleration due to gravity on the Moon is 1.6 m/s2 (seconds squared). a) calculate his weight on the moon. the astronaut climbs 100m to the top of the crater . b) by how much does his ...

**world problem**

chloe collected 4 times as many bags of cans as her friend. if her friend collected 1/6 of a bag how much did chloe collect

**Science**

Ms. Sue

**Science**

.......

**Science**

How is potential and kinetic energy measured?

**english**

So i was reading an article and the question was ¨what heroic act did malala participate in? What does the question mean when it says 'heroic act ' thank you

**math**

i just need you to please give me tips and examples and maybe later i might tell you my answer to see if its correctp

**math**

hello im having problems with my math 1 Wells College in Aurora,New York was previously an all -girls college.In 2005,the college began to allow boys to enroll. By 2012, the ratio of boys to girls was 3 to 7. if there were 200 more girls then boys in 2012, how many boys were ...

**science**

Thank you so much

**science**

So the question is write down three examples of science in your everyday life. This was my answer: sound- compression wave, Baked goods- chemical reaction, Looking at mountains or ocean- earth science Please check my answer and see if this is good thank you

**science**

what are examples of science in your everyday life please help

**physics**

mass=50g=0.05kg v=500 s=10cm=0.01m K.E= 1/2mv^2 1/2x0.05x500x500 =6,250m/s^2

**Science**

A ray of light approaches a jar of honey at an angle of 30.0 degrees. If the angle of refraction is 19.5 degrees, what is the refractive index of honey?

**Science**

What is the index of refraction of a material if the angle of incidence in air is 50 degrees and the angle of refraction in the material is 40 degrees? Please show steps.

**Science**

What is one qualitative factor and one quantitative factor that affect the refraction of light as it passes from one medium to another?

**Calculus**

Find the following integral ? How , is it by substitution !!!!!!!!

**Calculus**

∫1/(x2 − 2x + 8)3/2 dx

**Math**

121/100

**Math**

@rainbowunipenquin waitifyou did the test can you give me the ansers?

**Chemistry**

A student intend to prepare 200ml of 0.3M NaCl solution . The mass in gram of NaCl needed to prepare solution is ?!

**Chemistry**

To remove temporary hardness we may use ?!!!

**Chemistry**

A water sample has TDS of 6000mg/l and the total hardness f 60mg/l , the water can be classified as ........

**Chemistry**

The mass of watch glass is 24.5 g , the mass of watch glass plus white crystals befor drying is 29.1g , and the mass of watch glass and white crystals after drying 27.9 , thus the mass of the white crystals is !????!

**Chemistry**

If we put a drop of acid in a cup of natural water , the PH will ?

**Chemistry**

1.2g of NaCl as used to prepare 200 ml solution , what is the molar concentration of NaCl in solution ?

**Chemistry**

A student mixed 40ml of 0.2m Na2co3 solution with 50 ml f 0.25M cacl2 solution , what is the except number of moles of naclkkw that I will be formed ?

**Chemistry**

The measured experimental volume of ascetic acid in a sample of vinegar was 7% and the manufacture claimed volume is 5.8% , what is the percentage error ?

**Chemistry**

What are the Salts are taken into consideration in the calculation of the total alkalinity ????

**Chemistry**

The separate suspended solid from a solution , we may use .......

**Chemistry**

In TDS experiment , the mass of the empty beaker was 25.683g , and the mass of the beaker after water evaporated 25.687 g , if the volume of the sample 50 ml , then the TDS of the water sample is ?

**Chemistry**

In an experiment we have 4 liters of AlAin water in contain or A , and 2 liters of dubai water in contain out B . The alkalinity of water in container A and the alkalinity of water in container B are 50 and 150mg/l as caco3 ,,respectively the alkalinity of water B is 7

**Chemistry**

In the. Reaction (Na2co3+CaCl2-->2NaCl+caco3) The precipitate is :

**Physics**

Two forces FA and FB are applied to an object whose mass is 9.53 kg. The larger force is FA. When both forces point due east, the object's acceleration has a magnitude of 1.43 m/s2. However, when FA points due east and FB points due west, the acceleration is 1.28 m/s2, due...

**Uos**

Two horizontal forces, and , are acting on a box, but only is shown in the drawing. can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that = +2.6 N and the mass of the box is 4.7 kg...

**social studies(updated answers)**

you don't have to be so rude ms.sue that so rude of you

**math**

a parabolic bridge over a road is 4 meter tall 4 meter wide and 5 meter long determain the maximum height of a 2 meter truck can drive under the bridge

**Physics**

Problem 3- A 10-g metal ball is moving to the left with a velocity of magnitude 0.4 m/s has a head-on, elastic collision with a larger 30-g metal ball moving to the right with a velocity of magnitude 0.2 m/s. a) Find the speed of the two balls after the collision. b) If the ...

**Physics**

Problem 2- A 15 kg block is attached to a very light horizontal spring of force constant 400 N/m and is resting on a smooth horizontal table as shown in the figure below. Suddenly it is struck by a 3 kg stone traveling horizontally at 8 m/s to the right, whereupon the stone ...

**Physics**

Problem 1- A 0.5 kg ball is moving to the right at 5 m/s when it is suddenly collide by a wall that exerts on it a horizontal force of 2.5 N for a period of 0.8 s. a) What is the impulse does the force of the wall exert on the ball? b) What is the velocity of the ball after ...

**Physics**

A400 N child is swing that is attached tow ropes 2m long , find the gravitational potential energy of the child-earth system relative to the red line level when ropes make an angle with the vertical .

**Physics**

a box initially moving with a speed of 5m/s along a rough , horizontal floor , it stopped it after 5 m the conffenict friction is 0.3 find the work done by friction .

**Physics**

Problem2-AFor A=-I+2j +5k and B=2j-3k,find: a) The dot productA.B b) The angle between the A and B

**Physics**

Problem 4: A 250 g block is dropped onto a relaxed vertical spring that has a spring constant of k= 2.5 N/cm. The block becomes attached to the spring and compresses the spring 12 cm before momentarily stopping. While the spring is being compressed, (a) what work is done on ...

**Physics**

Problem 3- A block of mass m1 = 4 kg moves from rest under the influence of a varying force F(x) = 4x + 38, where F is in newton and x is in meters, on a rough horizontal surface having a coefficient of kinetic friction of 0.2. The block is connected by a light cord passing ...

**Physics**

A roller-coaster car has a mass of 500 k when fully loaded with passengers. If at point a the forces exerted by the truck on the car is 15000 What is the acceleration at point A?

**Physics**

Problem 3- A 40 kg child swings in a swing supported by two ropes, each 3 m long. (a) If the tension in each rope at the lowest point is 350 N, a. find the child's speed at the lowest point. b. the force exerted by the seat on the child at the lowest point. (Neglect the ...

**Physics**

Thank you very much Elena