Mariam

This page lists questions and answers that were posted by visitors named Mariam.

Questions

The following questions were asked by visitors named Mariam.

find the domain and range of the function g(x)= 10+2x-x^2 (all under radical)

What are minerals? Give names of a few minerals and details of the following: 1 Iron and calcium 2 Iodine and phosphorus

Ethylene glycol, HOCH2CH2OH, is used as antifreeze. It is produced from ethylene oxide, C2H4O, by the following reaction. C2H4O(g) + H2O(l) → HOCH2CH2OH(l) Use Hess's law to obtain the enthalpy change for this reaction from the following enthalpy changes....

what will be the best thesis to start my paper with? my topic is segregation

Let f be he real-valued function defined by f(x)=sin^3x+sin^3|x| (a) find f'(x) for x>0 (b) find f'(x) for x<0 (c) determine whether f(x) is continuous and x=0 (d) determine whether the derivative of f(x) exists at x=0

A car starts from rest and moves with constant acceleration during the 5th second of its motion,it covers a distance of 36 meters. what is the acceleration

Explain how a parachutist's loss of momentum on landing is consistent with the principle of conservation of momentum?

A water-skier is being pulled at a steady speed in a straight line. her mass plus the mass of the ski is 65 kg. the pull of the tow rope on her is 520 N. a...i) What is the vertical component Y of the push of the water on the ski?? ....ii) What is the hor...

in a pinball machine, a force of 24 N is used to compress a spring a distance of 0.080m. a. What is the potential energy stored in the spring? b. What is the maximum speed tha it van produve in a ball of mass 0.15kg?

In a tidal barrage scheme, the area of sea-water behind the barrage is 30km^2, tidal depth is 10m and the density of sea water is 1030kgm^-3. a. What energy is possible available from this scheme in one cycle of ebb and flow???

A 2000kg van and a 1500 kg car both travelling at 40ms^-1 in opposite directions collide head on and lock together. what are their speed and direction immediately after the collision?

14. A racing car accelerates uniformly through three gears, changes with the following average speed: 20 for 2.0 s 40 for 2.0 s 60 for 6.0 s What is the overall average speed of the car?

A light spiral spring is suspended from its upper end. A mass of 7.5*10^-2, hung from the lower end produces an extension of 0.15 m. The mass is pulled down to a furthur 8.0*10^-2 m and released so that it oscillates calculate the spring constant.

A train moves at a speed 72km/hr. When it approaches the station the driver brakes the train stops in 30 minutes. a) what is the value of deceleration? b) what is the duration it takes to stop?

Ores are analyzed by dissolving some of the ore and then performing an analysis of a metal (expressed in grams); usually the concentration of the metal is expressed as % of the amount of the ore (in grams) dissolved. An ore containing V was dissolved and...

Problem 2- A 4 kg object is attached to a vertical rod by two strings, as in the Figure. The object rotates in a horizontal circle at constant speed 6 m/s. Find the tension in (a) the upper string and (b) the horizontal string.

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 poin...

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?

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...

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

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 .

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 .

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 velocit...

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,...

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 c...

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

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 o...

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 ?

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

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

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 ?

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 ?

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

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

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 !????!

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

To remove temporary hardness we may use ?!!!

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

∫1/(x2 − 2x + 8)3/2 dx

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

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.

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?

what are examples of science in your everyday life please help

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 y...

How is potential and kinetic energy measured?

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)...

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

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

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

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 h...

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...

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

What can we learn from an experiment itself?

What are some home appliances that can cause phase changes?

Is Anne Frank legacy her diary?

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

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 use...

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 ha...

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

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 concentrat...

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

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?

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...

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

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?

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

What is fascism? Thank you!

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

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 ..

A statistics class is made up of 60% women and has 21 women in it. What is the total number of students in the class?

study looked at the effects of light on female mice. Fifty mice were randomly assigned to a regimen of 12 hours of light and 12 hours of dark (LD), while another fifty mice were assigned to 24 hours of light (LL). Researchers observed the mice for two yea...

"Relative frequency" is the same as which of the following? frequency histogram cumulative frequency distribution proportion I think its proportion, am I right?

True or false: P varies directly as Q can be written as P = kQ.

True or false: Suppose that y varies directly as x. If y is 5 when x is 30, the constant of variation is 150.

If w varies directly as z and w = 9 when z = -6, find w when z = 3. a) 0 b) -4.5 c) -2 d) 4.5

Roger tosses a ball straight upward at a velocity of +32m/s, calculate the maximum height of the ball and the time to get to the maximum height.

George drops a stone from atop a cliff of 25m. How long does it take to hit the ocean below, what velocity is it travelling when it gets there?

The ceiling of a school gymnasium is a distance of 20m. You toss a ball 1.5m from the ground. What is the maximum initial velocity you can toss the ball and have it just miss the ceiling?

Jeff tosses a can of soda pop to Karen, who is standing on her 3rd floor balcony a distance of 8.5m above Jeff’s hand. Jeff gives the can an initial velocity of 16m/s, fast enough so that the can goes up past Karen, who catches the can on its way down. Ca...

how can I divide (3+4i)/(2-5i)?? If there's work, that would help me too

A tennis ball is tossed up off a building with a velocity of 22m/s. It takes 6.4s to reach the ground. How high is the building and what is the maximum height of the tennis ball?

Rex flips a coin vertically upwards with an initial velocity of 0.262m/s. Determine the height to which the coin will rise above the initial height. At what velocity is the coin moving when Rex catches it.

The city is trying to figure out how long the traffic light should stay yellow at an intersection. The speed limit on the road is 45.0 km/h and the intersection is 23.0 m wide. A car is traveling at the speed limit in the positive direction and can brake...

A sailboat is moving across the water at 3.0 m/s. A gust of wind fills its sails and it accelerates at a constant 2.0 m/s2. At the same instant, a motorboat at rest starts its engines and accelerates at 4.0 m/s2. After 3.0 seconds have elapsed, find the v...

A little bumblebee accelerates uniformly at 1.5 m/s2 from rest to 22 m/s. Immediately upon reaching 22m/s, the brakes are applied and it stops 2.5 s later. Find the total distance traveled.

A pumpkin is thrown upwards at a speed of 27.5 m/s and from a height of 2 m above the ground. How long before it hits the ground and smashes? Not sure where to begin with this.

Umm, how do I find this? with work? Use a calculator to evaluate the function at the indicated value of x. Round your answer to four decimal places. f(x) = 3 ln x x = 0.32

A shopper in a supermarket pushes a loaded cart with a horizontal force of 80.5N. If the cart has a mass of 33.8kg, how far will it move in 1.31s, starting from rest? The coefficient of friction is 0.12

An truck with a mass of 3500 kg travels with a velocity of 22.0 m/s. Find the momentum.

Find the force necessary to stop a 900 kg jetta traveling at +25 m/s in a time of 5.0 seconds.

Answers

The following answers were posted by visitors named Mariam.

Cash DR 97500.00 AC Receivable 552500.00 Sales 650000.00 Sales 650000.00 Cost of Sales 390000.00 Gross profit 260000.00

Thnx a lot steve

U can imagine a syringe filled with gas..... nw assume that ur appying more pressure on it by increasing the pressure on piston.... as ths is done piston moves down thus compressing the volume of gas n hence we say thay volume decreases as piston moves do...

Sir but the and which u got is the same as i got but its not given in the options. here are the options A. 12 B. 13.3 C. 40 D. 48 E. 37

Sir Steve I got the ans 46 but the correct ans is 48 S=vt+1/2at^2 in 1st gear S=v*2+1/2*20*2^2 S=2v+40..........eq 1 in second gear S=vt+1/2at^2 s=v*2+1/2*40*2^2 S=v+80.........eq 2 in third gear S=vt+1/2at^2 S=v*6=1/2*60*6^2 S=6v+1080.......eq 3 substitu...

I have no idea that is why i asked :/

Yes, it is. It's the same answer I got.

Thank you very much Elena

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

ummmmmmmmm......... i acctually havve a question what particales are in a colloid?????? help!!!!!!!

Thank you so much

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

I meant y=0.5x+1

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

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

Thank you again

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???

Can you explain why its a legacy?

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

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

hello ÈãÇÐÇ íäÊÝÚ ÇáÇäÓÇä áæ ÑÈÍ ÇáÚÇáã ßáå æÎÓÑ äÝÓå sorry did I answer your question

ÈãÇÐÇ íäÊÝÚ ÇáÇäÓÇä áæ ÑÈÍ ÇáÚÇáã ßáå æÎÓÑ äÝÓå

I am extremely sorry I wrote it but it did not work I am extemly sorry

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

Is there a formula for this? Please I need help

1.) Always wash your hands and make sure that you have all ingredients and tools that you'll need on-hand in the lab.

ok that doesn't really help but ok

I still don't get it where do I insert what?

Thank you! I understand it

phloem (or bast, liber) is the living tissue that transports the soluble organic compounds made during photosynthesis and known as photosynthates, in particular the sugar sucrose, to parts of the plant where needed. This transport process is called transl...

Three or more points that lie on the same line are collinear points

#2, #6, and #7 are wrong.

#6 is correct, nevermind.

how exactly do I use the quadratic formula here? like where would I insert the variables to solve

Work done on the load = l *ld 500*30= 15,000j 2. Eff= output/input*percent 80=500*3*30*100/input Cross multiple effort = 56,250j

What is the total pressure of the gas produced in the burette if it contains nitrogen gas whose pressure is 1.5 atm, oxygen gas whose pressure is 1.6 atm and water vapour with a pressure of 1.3 atm.

I need help Fell city babysat 2 hours each night for 10 night she earned a total of 180 dollars felicity wants to calculate her hourly rate how much did felicity earn per hour babysitting A)$9 B)$15 C)$18 D)$20

Substitution method

if i may ask, where did you get 349kJ/mol from?

I didn't see the workings

I still dont understand

are u sure its b

lol free answers

Um I don’t get how you get the answer and what the answer is can you explain and tell the answer?

And also it is a Question on my homework to

How to solution this question

P(A) = 4/9 P(B) = 1-(1/16) P(A∩B)= 4/9 P(C) = 0 P(D) = 3/4 P (A∩D) = 11/36

True, because all outcomes are equaly likely to hapen and have a probability of 1.

1. No 2. 3/2 3. 2/5 4. 4/13

Since Y' is just Y scaled by a factor of 1/3, Y' carries the same information as Y, so that E[Θ∣Y]=E[Θ∣Y']. Thus, the alternative observation model Y′=Θ+(W/3) will lead to the same estimates and will have the same mean squared error as the unscaled model...

As usual, we focus on the exponential term in the numerator of the expression given by Bayes' rule. The prior contributes a term of the form e^(-1/2*(Θ^2_1Θ^2_2)) Conditioned on (Θ_1, Θ_2) = (θ_1, θ_2), the measurements are independent. In the conditional...

a) Yes. The denominator in Bayes' rule involves an integral with respect to È. Once the conditional PDF is available, the LMS estimate is calculated by integrating again over the one-dimensional variable È. b) No. In this case, we need to average the cond...

I want to learn math on Ap and Gp

A varies darectly as M and N inversely as the square root of V.the relationship between A,M,N,V solution AXMN/V" A=KMN/V"

Write an argumentative essay on the topic "A teacher is better than a farmers"

Write an argumentative essay of the topic "A teacher is better than a farmers"

From the top of a tower the angle of depression of a boat is 30. If the tower is 20 high. How far is the foot of the tower

If x-3 is directly proportional to the square of y and x=5 when y=2, find x when y=6

John has 1/8 left