Saturday

February 25, 2017
Total # Posts: 305

**Kumar**

What is science?

*December 11, 2016*

**Kumar**

What is number?

*December 10, 2016*

**Kumar**

What is the life of earth ? explain and why?

*December 10, 2016*

**Physics**

A square loop,circular loop prepared from a straight wire of length L are moved out of a uniform magnetic field,acting normal to the plane of the paper at a constant velocity v.Draw the variation of induced emf with time for both the loops. How will the graphs look

*December 2, 2016*

**Physics**

Given below are the some of the function of x and t to represent the displacement (transverse or longitudnal ) of an elastic wave . State whether it is stationary or travelling wave or none of them. (i) y = 3sin(5x+0.5t) + 4cos(5x+0.5t) (ii) y = 3sin(5x+0.5t) + 4cos(5x-0.5t) (...

*December 2, 2016*

**Physics**

A hoop of mass 'm' is projected on a floor with linear velocity 'v' and reverse spin 'w'. The co efficient of friction is 'u'. What is the (i) time of pure rolling? (ii) velocity of return?

*December 2, 2016*

**Physics**

If 0.01% of electrons are removed from 18 gm water, then calculate the charge produced in the water.

*December 2, 2016*

**Physics**

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 hammer would be no more effective than hitting it with a feather. Because the hammer is weightless in space. Man B says that he found mass of the ...

*December 2, 2016*

**maths**

a man gives 40% of his money to his children and 20% of the remaining to a trust. if he is still left with rs.9600.what did he originally have?

*November 18, 2016*

**math**

by what number should 3-³ be multiplied to obtained 4 ?

*August 23, 2016*

**science**

Write an equation to show reaction of pop with water

*August 3, 2016*

**science(physics)**

A bullet of mass 100g moving with20m/sec .Strikes a wooden plank and peretrates up to 20cm.Calculate the resistance offered by the wooden plank.

*July 27, 2016*

**What Hapened, Zn+ Cu2+**

Zn2++ Cu

*June 23, 2016*

**Math**

Write 1.5 billion to indian place value system.

*June 11, 2016*

**PHYSIC**

IN YOUNG DOUBLE SLIT EXPERIMENT LIHGIT WAVE LENGTH 620NM is ured on 2slit are 0.3 mm interference fringes observed on the screen are 1.3 a) calculate the distance fr6 the screen and the fringd width if the distance double

*June 6, 2016*

**statistics**

2. At a local university, a sample of 49 evening students was selected in order to determine whether the average age of the evening students is significantly different from 21. The average age of the students in the sample was 23 years. The population standard deviation is ...

*May 24, 2016*

**physics**

A body is moving with velocity of 10_1.If the motion is uniform; what will be its velocity after 10 second

*May 18, 2016*

**Math**

A plant 73cm tall.how many more centimetres does it have to grow before it is 1 metre tall?

*April 30, 2016*

**physics**

An elevator cable can withstand a maximum tension of 1.83×104 N before breaking. The elevator has a mass of 420 kg and a maximum acceleration of 2.27 m/s2 . Engineering safety standards require that the cable tension never exceed two-thirds of the breaking tension

*April 21, 2016*

**Calculus**

216pi

*March 1, 2016*

**maths**

A train 300 m long overtook a man walking along the line in the same directionat the rate of 3km/hr and passed him in 36seconds find the speed of the train.

*February 4, 2016*

**maths**

At an election, a candidate secures 40% of the total votes but is defeated by the only other candidate by 300 votes .find out the total number of votes polled.

*February 4, 2016*

**Science**

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 will cover in 1 hour of his journey

*January 26, 2016*

**math**

30 34 38

*January 15, 2016*

**JNU**

A two digit number is such that the product of the digits is 8. When 18 is added to the number, the digits are reversed. Find the number.

*December 26, 2015*

**Chemistry**

What is the ionic strength of 0.2 M Na2HPO4 in a solution?

*December 21, 2015*

**math**

5% profit

*December 20, 2015*

**Rs argrwal**

Bd is öne of the diagonal of quad. Abcd.if al | bd and cm| bd ,show that ar(quad.abcd)=1/2xbdx(al+cm)

*December 1, 2015*

**math**

Find the height of a cuboid whose volume is 168 cubic metre and the area of the base is 28 square metre. The length of a reservoir is 2.5m. It's width is 2 m and its height is 4 m. If it is half-filled with water, find the volume of the water in the reservoir. Pls consider...

*November 22, 2015*

**math**

Find two positive real numbers x and y such that they add to 120 and x^(2)y is as large as possible

*November 21, 2015*

**Maths**

find two positive real numbers x and y such that their product is 800 and x+2y is as small as possible

*November 19, 2015*

**maths**

The ratio of speed of A and B is 2:3 and A takes 10 minutes more than the time taken by B to reach a destination. If A had walked at triple the speed, and B at half the speed, the difference between time taken by A and B will be: a) 15 minutes b) 20 minutes c) 25 minutes d) 30...

*October 2, 2015*

**soild**

A piece of material subjected to three mutually perpendicular stresses of 70, 56 and 84 MPa. If E= 200 Gpa, Poissions ratio= 0.28 Determine 1) Principal strains 2) Shear modulus 3) Bulk modulus.

*August 7, 2015*

**rd. math**

Pl find out hcf using division method 180,252,576

*July 29, 2015*

**Physics**

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 make an angle of 60° with the vertical. The length of the pendulum is 2.3 m. Find the speed of the bullet. ?m/s Any help is greatly appreciated. ...

*July 21, 2015*

**math**

I don't no

*July 11, 2015*

**total pitches**

#60 pitch chain moving 180" conveyor. if one pitch 3/4. how many pitches need.

*June 9, 2015*

**need ratio**

1 1/2:4 1/2 need ratio

*June 9, 2015*

**MATH**

cut the iron peace in to ten total is 4 5/8. calculate if cut 1/16

*June 8, 2015*

**math**

two 12" PULEY MOVING CONVAYOR. IF IN MIDDLE BELT LENGTH 3 FEET,CALCULATE TOTAL LENGTH.

*June 8, 2015*

**electromagnetism**

magnet A. The difference in fall times depends on the strength of the magnets.

*April 14, 2015*

**chemistry**

You have to prepare a pH 5.00 buffer, and you have the following 0.10M solutions available: HCOOH, HCOONa, CH3COOH, CH3COONa, HCN, and NaCN. Which solutions would you use? HCOOH HCOONa CH3COOH CH3COONa HCN NaCN

*March 23, 2015*

**chemistry**

Is sodium isotonic with Mg²+

*January 23, 2015*

**chemistry**

WHAT IS THE FORMULA FOR 5.97 X 10 TO THE 11TH POWER

*December 31, 2014*

**Algebra**

Tell whether the each statement is sometimes, always or never true 1) If n is zero then x^-n is 1 2) If n is negative integer then x^-n=1 3) If x is zero then x^-n is 1 4) If n is an integer then x^-n>1

*December 12, 2014*

**Advanced math**

Find the Fourier sine expansion of the function sin(x) - sin(4x)

*November 17, 2014*

**Math**

CAN-179 SUrE-354 I-2

*October 29, 2014*

**physics**

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 axis. (Nonconservative forces are not involved.) In the graphs, the potential energies are U1 = 10 J, U2 = 35 J, and U3 = 50 J.

*October 22, 2014*

**calculus**

Find the points of the paraboloid z=x^{2}+y^{2}-1 at which the normal line to the surface coincides with the line joining the origin to the point. What is the acute angle betwwen the normal and the z-axis at these points?

*October 18, 2014*

**calculus**

A cable runs along the wall from C to P at a cost of $3 per meter, and straight from P to M at a cost of $5 per meter. If M is 16 meters from the nearest point A on the wall where P lies, and A is 50 mters from C, find the distance from C to P such that the cost of installing ...

*October 18, 2014*

**calculus**

Find the points of the paraboloid z=x^{2}+y^{2}-1 at which the normal line to the surface coincides with the line joining the origin to the point. What is the acute angle betwwen the normal and the z-axis at these point

*October 18, 2014*

**calculus**

Will u please answer it with detailed

*October 18, 2014*

**calculus**

how would you represent the area outside given y= 4cos(2theta) but outside y=4 ?

*October 18, 2014*

**Algebra**

detremine whether the relation is a function or not 1)y=-15 2)x=5 3)((1,0),(1,4),(-1,1)) 4)((6,3),(5,-2),(2,3)) PLEASE EXPLAIN WITH DEETAILED

*October 18, 2014*

**Algebra**

CRITICAL THINKING Explain how you know that the slope of the line through (4, 5) and (4, 5) is positive without calculating.

*October 18, 2014*

**algebra 1**

Adding 3w-4 on both sides 3w-4+4=18-3w+3w-4 3w=14 dividing both sides by 3 3w/3=14/3 w=14/3

*October 17, 2014*

**calculus**

ind the point(s) on the cone z^2 = x^{2}+3y^{2} that are closest to the point (-1,-7,0)

*October 17, 2014*

**calculus**

A sample poll of 100 voters revealed the following information concerning three candidates A, B, and C who were running for three offices. 10 voted in favor of both A and B, 35 voted in favor of A or B but not C, 25 voted in favor of B but not A or C, 65 voted in favor of B or...

*October 17, 2014*

**physics**

A mass of 3.25 kg is attached to the end of a spring that is stretched 20 cm by a force of 14 N. It is set in motion with an initial position x_0 = 0 and initial velocity (in m/s) v_0 = -11. Find the amplitude, period, and frequency of the resulting motion. You should assume ...

*October 17, 2014*

**calculus**

Use Lagrange multipliers to find the maximum and minimum values of f(x,y)=x^2y+3y^2-y subject to the constraintx^2+y^2less than or equal to 10

*October 17, 2014*

**calculus**

Given g(x) = (x + cosx)/(e^x - 2x^3 + 5). Find g'(x). Do not need to simplify.

*October 17, 2014*

**calculus**

Find the point on the surface z = 2x2+xy+3y2 where the tangent plane is parallel to the plane 8x-8y-z=5.

*October 17, 2014*

**math**

Solve the initial value problem 3(y-1)^2 = y'', with y(0) = 3 and y'(0) = 4. Assume y does not equal 1.

*October 17, 2014*

**calculus**

f(x)= 3+4xe^{-5x}complete the sentences concerning the function a) the function f is decresing on the iterval...... b) the function f is increacing on the interval c) the function f is concave down on the interval d) the function f is concave up on the interva

*October 17, 2014*

**Algebra**

Given the following piecewise function: Find the Given the following piecewise function: f(x)= {?(x+10 for -9 ?x<-2@3 for -2 ?x ?0@2x-6 for 0<x ?5 )? Find the domain. Find the range. Find the intercepts. Is f continuous on its domain? If not, state where f is ...

*October 17, 2014*

**Algebra**

Describe how projections play a role in the least squares solution?

*October 17, 2014*

**math**

determine the number of zeros at the end of 50! using prime factorization

*October 16, 2014*

**algebra**

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 the total pages of book?

*May 2, 2014*

**math**

fedrick ordered a new sign for her store. The sign has 4 sides . It also has 2 right angles. 1 acute angle , and 1 obtuse angle . What is the shape of the sign. 1. Hexagon 2. Trapezoid 3. rhombus 4. parallelogram

*April 10, 2014*

**math**

john ordered a new sign for her store. The sign has 4 sides . It also has 2 right angles. 1 acute angle , and 1 obtuse angle . What is the shape of the sign. 1. Hexagon 2. Trapezoid 3. rhombus 4. parallelogram

*April 10, 2014*

**MATH**

Ella ordered 16 pizzas for a p. After the party,, there were 3 5/8 pizzas left. How much pizza was eaten? solve the problem

*April 4, 2014*

**math**

The 6th grade classes have started a contest to collect cans for recycling. The first class to reach 500 cans will win. The chart below shows the two classes in the lead. How many cans does each class have left to meet their goal? show the work . find how much they collected. ...

*March 24, 2014*

**biology**

In chickens, males have two Z sex chromosomes (ZZ) and females have one Z and one W sex chromosome (ZW). The mechanism for inheritance of the sex chromosomes is exactly the same as for X and Y sex chromosomes in other species. In chickens the character of ‘barred’ or...

*March 19, 2014*

**Biology**

A poultry farmer hopes to profit from the current craze for keeping egg laying chickens as pets and wishes to increase his stock of interesting and unusual breeds. (a) The farmer crossed a pure-breeding white chicken with a pure-breeding black chicken and found that 100% of ...

*March 19, 2014*

**science**

What type of prac do you think you need to use a filter funnel and filter paper. please help quickly

*March 5, 2014*

**Computer Science**

The Daily Gazette accepts classified ads in several categories. For most ads, the newspaper charges 10 cents per word for the first 50 words, and 8 cents per word for every word after that. Design Visual Logic Flowchart for a program that accepts data about an ad: customer ...

*February 20, 2014*

**General Chemistry**

How do the vapour pressure of two substance at the same temperature but with different strengths of the inter-molecular forces compare. Give a molecular explanation of why this is so.

*February 5, 2014*

**Chem**

Qc is the reaction quotient. And also, how would i solve this: Calculate the equilibrium concentration of each compound if 0.310 moles of H2 and 0.310 moles of I2 are placed in a 4.30 liter container at 520°C. Kc = 0.190 for the reaction at this temperature.

*February 5, 2014*

**Chem**

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 3.50 liter container at 30°C. Kc = 0.440 at this temperature.

*February 5, 2014*

**Math**

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, what happens to P as t gets very large? b. If P(0)=800, what happens to P as t gets very large? c. If P(0)=800, what happens to dP/dt as t gets very ...

*December 11, 2013*

**Math**

∫[dy/(y^2-1)] How do i solve this?

*December 10, 2013*

**Calculus**

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.

*December 10, 2013*

**Physics**

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 meters, he turns right and walks at a rate of 4m/s to the rail, which is 12 meters from his turning point. What is his velocity relative to the water...

*November 13, 2013*

**math**

Ram Dubey recently purchased a chain of dry cleaners in North Uttar Pradesh. Although the business is making a modest profit now, Ram suspects that if he invests in a new press, he could recognize a substantial increase in profits. The new press costs $ 15,400 to purchase and ...

*October 11, 2013*

**Chemistry 12**

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 the concentration of KIO3 in the final mixture of the dilution.

*October 2, 2013*

**math**

A. 10 yearsc B. 11 and 33

*July 14, 2013*

**English**

need complex sentence with cordinate& subordinate

*June 24, 2013*

**math**

An electric pole touches the ground due to bending in a wind. It is found that standing part of pole is equal to the distance of end touching the ground. If the end touching the ground from the pole is at distance 4 m, what was the length of pole before bending ?

*April 27, 2013*

**finance**

Fashion Distributors Incorporated currently sells on terms of 2/10, net 30, with bad debt losses at 1% of gross sales. Of the 99% of the customers that pay, 50% take the discount and pay on Day l0; the remaining 50% pay on Day 30 (average collection period of 20 days). FDI'...

*April 8, 2013*

**math**

This question

*March 21, 2013*

**math**

for what value of k are the roots of the quadratic equation (k+4)x*x+(k+1)x+1=0?

*March 14, 2013*

**Algebra**

118

*March 4, 2013*

**physics**

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 black body,the temperature of the sun is....

*February 28, 2013*

**physics**

You and a friend are going to a river, where they have a rope swing. Your friend, who has a mass of 60 kg, hops on the end of the rope. You tug horizontally on your friend with a force of 300 N, pulling them back until you can't move them any more. Then you let go and ...

*February 21, 2013*

**physics**

A cylindrical glass of radius r=3 cm is full of salt water of height h=10 cm with the water's refraction index changing linearly from the bottom n1=1.401 to the top n2=1.400. A flashlight is positioned so that light shines horizontally onto the glass. If we look at the ...

*February 21, 2013*

**physics**

Two protons and two positrons form a square as shown in the figure. All the particles are initially at rest. Due to Coulomb's repulsion, the particles fly off to infinity. Determine the ratio vp/ve where vp and ve are the final velocities of the protons and positrons, ...

*February 21, 2013*

**maths**

A man is visiting a village where each person either always tells the truth or always lies. There are 5 villagers standing in a row, and the man asks each of them how many of the 5 men standing in the row always tell the truth. Each villager gives an integer answer from 0 to 5...

*February 19, 2013*

**maths**

Find the number of triples of integers a<b<c with a≥−10, such that a(b−c)^3+b(c−a)^3+c(a−b)^3=0

*February 19, 2013*

**science**

A ski jumper launches from a ski jump that is oriented parallel to a hill. The jump has a vertical drop of 50 m and the coefficient of friction μ between the skier and the jump is 0.05. The launch point is 5 m above the hill and there is a small lip at the bottom of the ...

*February 17, 2013*

**green lawns**

With a chemical test differentiate between H2SO4 and H2SO3

*February 3, 2013*