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Mariam

Questions and answers by visitors named Mariam

Questions (144)

How many litres of water will a cylindrical pipe hold if it is 1m long and 7cm in diameter
1. 5 answers
2. asked by Mariam
3. 2,453 views
It takes 8 hours for 5 people to paint a room.How long would it take 4 people?
1. 7 answers
2. asked by Mariam
3. 5,765 views
$Create an image displaying the concept of refraction in action. Show a single beam of light coming in from the left, hitting a clear block of material situated in the middle of the frame. Display the light beam hitting the material at a 50-degree angle, which should be indicated by a curved line and the numerical value next to it. Then, show the light beam exiting the material at a 40-degree angle, similarly indicated. Remember to keep the image text-free, focusing purely on visually representing angles of incidence and refraction.$
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
1. 5 answers
2. asked by Mariam
3. 2,294 views
A car starts from rest and moves with constant acceleration during the 5th second of its motion,it covers a distance of 36
1. 7 answers
2. 7,087 views
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
1. 2 answers
2. 540 views
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
1. 6 answers
2. 2,560 views
AN astronaut on the Moon has a mass (including his spacesuit and equipment) of 180 kg. the acceleration due to gravity on the
1. 5 answers
2. 2,760 views
find the domain and range of the function g(x)= 10+2x-x^2 (all under radical)
1. 1 answer
2. 363 views
Market demand for wheat is relatively stable over time but market supply of wheat is very much influenced by the weather. For
1. 4 answers
2. 494 views
What are minerals? Give names of a few minerals and details of the following:1 Iron and calcium 2 Iodine and phosphorus
1. 1 answer
2. 382 views
Ethylene glycol, HOCH2CH2OH, is used as antifreeze. It is produced from ethylene oxide, C2H4O, by the following reaction.C2H4O(g
1. 2 answers
2. 652 views
what will be the best thesis to start my paper with? my topic is segregation
1. 1 answer
2. 336 views
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
1. 3 answers
2. 803 views
Explain how a parachutist's loss of momentum on landing is consistent with the principle of conservation of momentum?
1. 1 answer
2. 403 views
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
1. 2 answers
2. 955 views
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
1. 2 answers
2. 588 views
Explain how a parachutist's loss of momentum on landing is consistent with the principle of conservation of momentum?
1. 1 answer
2. 441 views
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
1. 3 answers
2. 1,041 views
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
1. 1 answer
2. 864 views
A 2000kg van and a 1500 kg car both travelling at 40ms^-1 in opposite directions collide head on and lock together. what are
1. 3 answers
2. 863 views
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
1. 3 answers
2. 370 views
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
1. 2 answers
2. 553 views
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
1. 3 answers
2. 388 views
Ores are analyzed by dissolving some of the ore and then performing an analysis of a metal (expressed in grams); usually the
1. 1 answer
2. 493 views
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
1. 5 answers
2. 2,785 views
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
1. 4 answers
2. 1,708 views
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
1. 2 answers
2. 692 views
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
1. 1 answer
2. 440 views
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
1. 3 answers
2. 2,138 views
Problem2-AFor A=-I+2j +5k and B=2j-3k,find:a) The dot productA.B b) The angle between the A and B
1. 1 answer
2. 266 views
a box initially moving with a speed of 5m/s along a rough , horizontal floor , it stopped it after 5 m the conffenict friction
1. 1 answer
2. 325 views
A400 N child is swing that is attached tow ropes 2m long , find the gravitational potential energy of the child-earth system
1. 1 answer
2. 668 views
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
1. 2 answers
2. 556 views
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
1. 4 answers
2. 6,266 views
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
1. 2 answers
2. 524 views
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
1. 1 answer
2. 813 views
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,
1. 2 answers
2. 682 views
In the. Reaction (Na2co3+CaCl2-->2NaCl+caco3)The precipitate is :
1. 3 answers
2. 733 views
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
1. 2 answers
2. 532 views
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
1. 1 answer
2. 480 views
The separate suspended solid from a solution , we may use .......
1. 1 answer
2. 318 views
What are the Salts are taken into consideration in the calculation of the total alkalinity ????
1. 1 answer
2. 323 views
The measured experimental volume of ascetic acid in a sample of vinegar was 7% and the manufacture claimed volume is 5.8% , what
1. 4 answers
2. 414 views
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
1. 2 answers
2. 472 views
1.2g of NaCl as used to prepare 200 ml solution , what is the molar concentration of NaCl in solution ?
1. 4 answers
2. 512 views
If we put a drop of acid in a cup of natural water , the PH will ?
1. 1 answer
2. 349 views
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
1. 3 answers
2. 893 views
A water sample has TDS of 6000mg/l and the total hardness f 60mg/l , the water can be classified as ........
1. 2 answers
2. 503 views
To remove temporary hardness we may use ?!!!
1. 3 answers
2. 401 views
A student intend to prepare 200ml of 0.3M NaCl solution . The mass in gram of NaCl needed to prepare solution is ?!
1. 2 answers
2. 1,268 views
∫1/(x2 − 2x + 8)3/2 dx
1. 6 answers
2. 792 views
What is one qualitative factor and one quantitative factor that affect the refraction of light as it passes from one medium to
1. 2 answers
2. 512 views
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
1. 3 answers
2. 3,699 views
what are examples of science in your everyday life please help
1. 1 answer
2. 411 views
So the question is write down three examples of science in your everyday life. This was my answer: sound- compression wave,
1. 4 answers
2. 601 views
How is potential and kinetic energy measured?
1. 1 answer
2. 408 views
How can you graph y=2X +0.5 and y=0.5+1?Thank you
1. 3 answers
2. 352 views
How do you graph a function like y=2x+0.5 and y=0.5x+1?
1. 1 answer
2. 312 views
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
1. 3 answers
2. 719 views
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,
1. 10 answers
2. 567 views
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
1. 7 answers
2. 513 views
What are some reading strategies or tips I can use for the Ela state exam?
1. 5 answers
2. 498 views
What can we learn from an experiment itself?
1. 1 answer
2. 289 views
What are some home appliances that can cause phase changes?
1. 1 answer
2. 376 views
Is Anne Frank legacy her diary?
1. 4 answers
2. 360 views
What were obstacles that Mo'ne Davis had to overcome?
1. 2 answers
2. 483 views
science questions:Look around your house and make a list o different kinds of containers that use insulation to keep foods hot
1. 7 answers
2. 604 views
How does molecules move throughout the water cycle?evaporation: They move freely in the air condensation:They lose energy and
1. 2 answers
2. 571 views
How do you graph mixed fraction from a table on a coordinate plane ??Thanks
1. 1 answer
2. 346 views
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
1. 3 answers
2. 2,332 views
What year was Jamestown settled? What were the settlers looking for initially? What guaranteedtheir success?
1. 3 answers
2. 572 views
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
1. 2 answers
2. 766 views
75% of the students on academic team earned 6 honors on the state examinations. the rest of the students on the team passed the
1. 1 answer
2. 435 views
Which Polygon will Always Be Irregular?A.TRIANGLE B.TRAPEZOID C.SQUARE D.HEXAGON
1. 5 answers
2. 1,352 views
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
1. 1 answer
2. 329 views
What motion does a saddle joint allow? What movement does a pivot joint allow? (please don't say pivotal) Thanks. :)
1. 3 answers
2. 615 views
What is fascism? Thank you!
1. 1 answer
2. 417 views
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?
1. 4 answers
2. 632 views
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
1. 3 answers
2. 1,642 views
"Relative frequency" is the same as which of the following?frequency histogram cumulative frequency distribution proportion I
1. 3 answers
2. 2,105 views
True or false: P varies directly as Q can be written as P = kQ.
1. 2 answers
2. 609 views
True or false: Suppose that y varies directly as x. If y is 5 when x is 30, the constant of variation is 150.
1. 1 answer
2. 438 views
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
1. 2 answers
2. 670 views
When buying gasoline, you notice that 14 gallons of gasoline is approximately the same as 53 liters. Use this information to
1. 2 answers
2. 621 views
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
1. 2 answers
2. 1,196 views
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
1. 3 answers
2. 1,053 views
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
1. 3 answers
2. 954 views
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
1. 3 answers
2. 820 views
how can I divide (3+4i)/(2-5i)?? If there's work, that would help me too
1. 1 answer
2. 410 views
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
1. 3 answers
2. 558 views
Rex flips a coin vertically upwards with an initial velocity of 0.262m/s. Determine the height to which the coin will rise above
1. 3 answers
2. 476 views
The city is trying to figure out how long the traffic light should stay yellow at an intersection. The speed limit on the road
1. 2 answers
2. 885 views
The United States and South Korean soccer teams are playing in the first round of the World Cup. An American kicks the ball,
1. 2 answers
2. 654 views
A rail gun uses electromagnetic energy to accelerate objects quickly over a short distance. In an experiment, a 2.00 kg
1. 1 answer
2. 647 views
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
1. 2 answers
2. 910 views
A little bumblebee accelerates uniformly at 1.5 m/s2 from rest to 22 m/s. Immediately upon reaching 22m/s, the brakes are
1. 3 answers
2. 1,863 views
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
1. 3 answers
2. 623 views
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
1. 4 answers
2. 684 views
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
1. 2 answers
2. 1,284 views
An truck with a mass of 3500 kg travels with a velocity of 22.0 m/s. Find the momentum.
1. 4 answers
2. 612 views

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