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Raj

Questions (360)

the highest test score scott can receive is a 100.The sum of his first four test scores is atleast 360.Find the range of scores
1. 1 answer
2. 610 views
One card is drawn at random from the card of 52 cards then what is the probability but the card drawn from face card
1. 1 answer
2. 540 views
A body of 6 kg rest in limiting equilibrium onan inclined plane whose slope is 30° the plane is raised to a slope of 60 degree
1. 2 answers
2. 1,166 views
The fifth term of an A.P exceeds twice the second term by 1.The tenth term exceeds twice the fourth term by 3.Find:1.the first
1. 1 answer
2. 4,698 views
Given that 1/(y-x), 1/2y, and 1/y-z are consecutive terms of an arithmetic progression, prove that x,y, and z are consecutive
1. 1 answer
2. 655 views
Given that 1/(y-x), 1/2y, and 1/y-z are consecutive terms of an arithmetic progression, prove that x,y, and z are consecutive
1. 4 answers
2. 3,518 views
What is science?
1. 1 answer
2. 490 views
What is number?
1. 2 answers
2. 427 views
What is the life of earth ? explain and why?
1. 1 answer
2. 434 views
A square loop,circular loop prepared from a straight wire of length L are moved out of auniform magnetic field,acting normal to
1. 0 answers
2. 523 views
Given below are the some of the function of x and t to represent the displacement(transverse or longitudnal ) of an elastic wave
1. 0 answers
2. 629 views
A hoop of mass 'm' is projected on a floor with linear velocity 'v' and reverse spin 'w'. Theco efficient of friction is 'u'.
1. 0 answers
2. 368 views
If 0.01% of electrons are removed from 18 gm water, then calculate the charge producedin the water.
1. 1 answer
2. 658 views
The crew men in space are discussing whether they can crack a wall nut with a hammer.Man A says that hitting wall nut with a
1. 0 answers
2. 507 views
A bullet of mass 100g moving with20m/sec .Strikes a wooden plank and peretrates up to 20cm.Calculate the resistance offered by
1. 1 answer
2. 2,519 views
Write 1.5 billion to indian place value system.
1. 1 answer
2. 441 views
A plant 73cm tall.how many more centimetres does it have to grow before it is 1 metre tall?
1. 1 answer
2. 573 views
a man runs a distance of 197.5 km in 200 minutes and he reduced his speed by 5 kmph in every 30 minutes. how much distance he
1. 2 answers
2. 524 views
A two digit number is such that the product of the digitsis 8. When 18 is added to the number, the digits are reversed. Find the
1. 1 answer
2. 488 views
What is the ionic strength of 0.2 M Na2HPO4 in a solution?
1. 7 answers
2. 7,256 views
Bd is öne of the diagonal of quad. Abcd.if al | bd and cm| bd ,show that ar(quad.abcd)=1/2xbdx(al+cm)
1. 0 answers
2. 481 views
Find two positive real numbers x and y such that they add to 120 and x^(2)y is as large as possible
1. 1 answer
2. 4,685 views
find two positive real numbers x and y such that their product is 800 and x+2y is as small as possible
1. 1 answer
2. 3,317 views
Pl find out hcf using division method180,252,576
1. 9 answers
2. 3,477 views
A 14 g bullet is fired into the bob of a ballistic pendulum of mass 1.6 kg. When the bob is at its maximum height, the strings
1. 1 answer
2. 788 views
You have to prepare a pH 5.00 buffer, and you have the following 0.10M solutions available: HCOOH, HCOONa, CH3COOH, CH3COONa,
1. 2 answers
2. 4,826 views
Is sodium isotonic with Mg²+
1. 1 answer
2. 494 views
Tell whether the each statement is sometimes, always or never true1) If n is zero then x^-n is 1 2) If n is negative integer
1. 2 answers
2. 599 views
The figure below shows a plot of potential energy U versus position x of a 1.30 kg particle that can travel only along an x
1. 0 answers
2. 1,123 views
John read 1/4 of pages of book on Saturday and another 2/3 of pages on Sunday. She read the last 5 pages on Monday . What was
1. 2 answers
2. 854 views
The Daily Gazette accepts classified ads in several categories. For most ads, the newspaper charges 10 cents per word for the
1. 0 answers
2. 698 views
How do the vapour pressure of two substance at the same temperature but with different strengths of the inter-molecular forces
1. 1 answer
2. 535 views
Calculate the value of Qc for the reaction above if 2.30 moles of NO2, 1.50 moles of NO, and 1.20 moles of O2 are placed in a
1. 2 answers
2. 572 views
Assume that the rate of population growth of ants is given by the equation:dP/dt=.1P(1 - P/730)-(129000/7300) a. If P(0)=150,
1. 1 answer
2. 616 views
∫[dy/(y^2-1)]How do i solve this?
1. 1 answer
2. 316 views
Solve the differential and initial value problem:x(dy/dx) + 1 = y^2 y(1)=0 I tried using bernoulli and it didn't quite work.
1. 1 answer
2. 1,234 views
An ocean liner is traveling at 5m/s. A passenger on deck walks towards the rear of the ship at a rate of 4m/s. After walking 30
1. 2 answers
2. 536 views
Ram Dubey recently purchased a chain of dry cleaners in North Uttar Pradesh. Although the business is making a modest profit
1. 1 answer
2. 838 views
The original 10 ml (KIO3) solution is 0.020M is mixed with 10 mL of 0.0020M NaHSO3 which give a total volume of 20 mL. Calculate
1. 1 answer
2. 978 views
The light from the sun is found to have a maximum intensity near the wave length of 470nm assuming the surface of the sun as a
1. 1 answer
2. 699 views
can you check my answers if they are correct thank you1.) A convertible bond is currently selling for $945. It is convertible
1. 0 answers
2. 1,216 views
had a 1 day sale. the original bike price was $325. on sale the same bike was $276.25. what is the percent reduction for this
1. 1 answer
2. 488 views
A souvenir mug sells for 8 dollars. Kendra gives the clerk 9 dollars and receives 56 cents. what is the sales tax rate?Thx!
1. 1 answer
2. 390 views
Find the value of K such that the following trinomials can be factored over the integers:1. 36x^2+18x+K 2. 3x^2 - 16x+K
1. 1 answer
2. 1,282 views
A man is 4 times as old as his son.After 16 years he will be only twice as old as his son. find their present ages.
1. 5 answers
2. 711 views
Calculate ∆H˚ for the following reaction using the given bond dissociation energies.CH4 (g) + 2O2 (g) --> CO2 (g) + 2H2O (g)
1. 1 answer
2. 1,439 views
If a is the greatest common factor of 72 and 48, and if b is the greatest common factor of 108 and 144, what is the least common
1. 2 answers
2. 496 views
let θ(in radians) be an acute angle in a right triangle, and let x and y, respectively, be the lenghts of the sides adjacent
1. 1 answer
2. 577 views
let theta (in radians) be an acute angle in a right triangle, and let x and y, respectively, be the lenghts of the sides
1. 0 answers
2. 639 views
Assume that x>0 and y>0. If y=5sqrt{x+9} and dx/dt = 2, find dy/dt when x=7.
1. 1 answer
2. 587 views
Please advise on the following:From 1993 to 2003 the cumulative number N of AIDS cases in thousands can be approximated by,
1. 1 answer
2. 487 views
A right triangle has a base that is 2 more than twice the height. Find the length of the base for the triangle. If the area is
1. 1 answer
2. 877 views
nlim(n→+∞)⁡ ∑ (3/4)^k = k=1 the n is supposed to be above the sigma sign and the k=1 is supposed to be below the sigma
1. 2 answers
2. 520 views
nlim(n→+∞)⁡ ∑ (3/4)^k = k=1
1. 3 answers
2. 352 views
Use a simple area formula from geometry to find the area under function A(x) that gives the area under the function f(x) = 9 on
1. 2 answers
2. 1,117 views
Find all values of x, where the graph ofy = [(5x^3)-(6x)+(8)] / (x^2) crosses its oblique asymptote.
1. 1 answer
2. 411 views
Find all values of x, where the graph ofy = [(5x^3)-(6x)+(8)] / (x^2) crosses its oblique asymptote.
1. 1 answer
2. 412 views
use the definition of the derivative to calculate f'(x), if f(x)= SQRT(2x) and find the equations of the tangent line and the
1. 1 answer
2. 554 views
A 20 ton truck is pulling a 5 ton trailer.their common uniform velocity is 54 kmph.if the frictional force is 20N per both the
1. 4 answers
2. 807 views
Soybean meal is 18% protein, cornmeal is 9% protein. How many pounds of each should be mixed together in order to get a 360-lb
1. 0 answers
2. 583 views
Soybean meal is 18% protein, cornmeal is 9% protein. How many pounds of each should be mixed together in order to get a 360-lb
1. 0 answers
2. 492 views
The small archerfish (length 20 to 25 cm) lives in brackish waters of Southeast Asia from India to the Philippines. This aptly
1. 0 answers
2. 568 views
When excess solid Mg(OH)2 is shaken with 1.00 L of 1.2 M NH4Cl solution, the resulting saturated solution has pH = 9.30.
1. 5 answers
2. 5,023 views
a 500 ml portion of .0020 M Na2C2O4 solution is able to dissolve .47g of MgC2O4. What is the Ksp for MgC2O4
1. 1 answer
2. 760 views
Can anyone help me get some points?What can the Church do today to make itself more relevant to Generation X?
1. 1 answer
2. 325 views
The length of the base of a triangle is 4 times its altitude. If the area the triangle is 162 cm2, find the altitude.
1. 1 answer
2. 560 views
PartA: What volume of 10.0M NaOH is needed to prepare a buffer with a pH of 7.79 using 31.52 g of TrisHCl? TrisHCl is a weak
1. 30 answers
2. 6,179 views
45.00 mL of 1.55×10^−2 M HI(aq) is mixed with 85.00 mL of 1.08×10^−2 M KOH(aq). What is the pH of the solution?
1. 4 answers
2. 2,123 views
What is [H3O+] in a solution obtained by dissolving 215 mL HCl(g), measured at 23 degrees C and 757 mmHg, in 4.30 L of aqueous
1. 1 answer
2. 795 views
How many millimeters of this solution should be diluted with water to produce 650 mL of a solution with pH= 11.50? 6.8% ammonia
1. 3 answers
2. 679 views
How many millimeters of a 15.0%, by mass solution of KOH(aq)(d = 1.14 g/ml ) are required to produce 26.0 L of a solution with
1. 2 answers
2. 551 views
what mass of ethylene glycol, the main component, of antifreeze, must be added to 10.0 L water to produce a solution for use in
1. 1 answer
2. 772 views
what is the lewis dot structure for SO4 -2 and the ideal bonds, mollecular structure and hybrid orbitals?
1. 1 answer
2. 867 views
The percentage of adults who have been told at some point that they have hyptertension is 23.53%. If 10 adults are randomly
1. 2 answers
2. 1,840 views
Draw the Lewis structures for BrO3- and ClO4- and indicate their correct number of additional resonance structures.I'm a little
1. 2 answers
2. 8,973 views
Can someone please explain to me whats the difference between a buffered and non-buffered solution?
1. 1 answer
2. 1,115 views
I haven't calculus in a while. So can someone please help me with this, its for rates:log (base 1/4) 0.25 = m I know that m = 1,
1. 3 answers
2. 479 views
I need help distinguishing between nucleophiles and electrophiles. Like one of the examples I am given shows methanal,
1. 0 answers
2. 404 views
In the reaction PCl3 + Cl2 ---> PCl5.If the rate doesn't increase when the concentration of PCl3 is doubled and the rate
1. 3 answers
2. 863 views
If I2 reacted with hexane, how would we know, which carbons the Is go on? Would only one of the iodine go to the hexane and the
1. 0 answers
2. 475 views
For a lab, I had to react toulene with 1% I2 in dichloromethane. Would HI form as a result of this?Logically, I think there
1. 2 answers
2. 423 views
Given the weight of phenacetin and its percentage yield...how would I calculate its melting point?
1. 1 answer
2. 441 views
Write the structure for the alkane:molecular mass = 72 u; forms four monochlorination products. Well since its 72u and its an
1. 1 answer
2. 578 views
If I am given a molecular hydrocarbon structure, how would I be able to tell how sp3 hybridized carbons it possesses?Like my
1. 1 answer
2. 526 views
I can't figure this one out, the antiderivative of x^-1.I thought it would be c, but the derivative of c is zero.
1. 3 answers
2. 1,057 views
Can someone explain for organic chemistry naming, when something would be given something like "iso" in it or when we would say
1. 4 answers
2. 562 views
How can I tell whether something is a weak, strong, or non-electrolyte?I know non-electrolytes do not ionize, strong almost
1. 2 answers
2. 963 views
In a thermochemistry experiment the reaction of 0.0857 g of an unknown metal and an excess of 4.0 M HCl resulted in a 0.210 mL
1. 5 answers
2. 2,931 views
The reaction between 0.055 g of calcium with an excess of water was carried out in an ice calorimeter. The volume of water in
1. 0 answers
2. 649 views
When given a chemical reaction, how would I know whether a reaction is endo or exothermic and whether work is done on the system
1. 7 answers
2. 854 views
A person falls in water at 0 degrees C. After 20 minutes of exposure, they are suffering acute hypothermia, as their core body
1. 7 answers
2. 1,491 views
For each of the pairs of bases below, choose the stronger base:(i) NH2- or NH3 (ii) ClO3- or ClO2- (iii) Cl3CCOO- or Cl2HCCOO-
1. 4 answers
2. 1,261 views
Stelco has been recently legislated to reduce total SO2 emissions from iron smelting operations. Select the most effective
1. 4 answers
2. 568 views
Alright, I've made a list of reactions that would produce precipatations.NaCl + Zn CaCl2 + NaOH CaCl2 + Zn CaCl2 + Na2SO4 CuSO4
1. 12 answers
2. 1,082 views
I posted before about designing a procedure to determine two unknowns (1 solid, 1 solution). The possible solutions were: NaCl,
1. 2 answers
2. 907 views
I have to do lab experiment where I design a procedure to determine the identity of two unknowns given to me. One will be a
1. 3 answers
2. 1,106 views
Copper dissolves in nitric acid, producing copper (ll) nitrate. After reaction with sodium hydroxide and heating, copper nitrate
1. 1 answer
2. 912 views
Mars' moon Phobos has a mass of 1.07x1016 kg and a mean radiusof 11.1 km. Let's say our rocket blasts off from the surface of
1. 1 answer
2. 717 views
If the distance between two objects is tripled, by what factor will thegravitational force between them change?
1. 5 answers
2. 771 views
A sample of solid monoprotic acid with molar mass equal to 137.9 g/mol was titrated with 0.1879 M sodium hydroxide solution.
1. 2 answers
2. 670 views

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