Posts by anil

Total # Posts: 74

maths
a committee consists of 7 people.In how many waya a president,secretary and treasurer can be chosen

advance physics
A carnot’s engine with air as working substance is initially at 3270C and pressure of 12 atmospheres. The volume is one litre to start with. The expansion or compression ratio is 1:6. Find the lowest temperature and efficiency. (?= 1.4)

mathematics
... a straight road observes that at two points l km apart, the angles of elevation of a pole in front of him are 30° and 75°.

Business communication
the state government of sindland is going to bring some changes. They are bringing a change in human right issue. They want to secure sindland state ecologically. They want safeguard their existing freshwater resource. In addition they want to secure its ecosystem and ...

Artificial Intelligence
Consider a very simpli?ed model of AES in which there will be only one P box and one S box and an 8 bit key. Use 0xAE as the key. Show, step by step, how one encrypts the string T h e (without any embedded blanks) assuming that each letter is from ISO, thus Ox54, 0x68, 0x65 as...

maths
the ratio of two number is 2:3 and their sum is 30 find the numbers

sciene
A 4 meter long ladder weighing 25kg rest with its upper end against a smooth wall and lower end on rough ground. What should be the minimum coefficient of friction between the ground and the ladder for it to be inclined at 60 degree with the horizontal without slipping?

Math
On a shelf of length 7 m . mathematics and English books r to be arranged. Mathematics books occupied 4 m. Then 1)find d fraction of shelf left for English books.

math
sum of 1 to 198 odd positive intigers

math
an open rectangular box has external dimensions as follows: 100cm long,90cm wide and 80cm deep if it is made from wood 2cm thick, calculate the volume of wood in the box

science
what wt. of hno3 is required to make 1lt. if 2N solution to be used as an oxidising agent 3cu+8HNO3=3cuno3+2NO+4H2O

science
will silver nitrate solution mixed with calcium sulfate solution produce white precipitation? Will it be because formation of silver sulfate?

math
4( x-2) metres of rope is used to fence this rectangular enclosure.Find x

Statistics - Please help
Here are the monsoon rains (in millimeters) for the 23 strong El Nino years between 1871 and 2004: 628 669 740 651 710 717 698 653 604 781 784 790 811 830 858 896 806 790 792 957 872 a. To make the stemplot of these rainfall amounts, round the data to the nearest 10, so that ...

statistics
El Nino and the mosoon. The earth is interconnected. For example, it appears that El Nino, the periodic warming of the Pacific Ocean west of South America, affects that the monsoon rains that are essential for agriculture in India. Here are the monsoon rains (in millimeters) ...

Math
If52 men can do a piece of work in 35days in how many days 28 men will do it?

Math - 8th grade
65 days

Chemistry
whatis formula iron ore dencity

physics
If M and m are particles connected by light inextensible string. M is held at center and rotated about horizontal axis as M is in equilibrium.What is torque ABOUT ITS CENTER

physics
Two tugboats are towing a ship.Each exerts a force of 6000 N and the angle between two ropes is 60 degrees.What is the resultant force on the ship?

Science Dr. Bob222
I don't know how to find the specific heat in q1. I have q1 = 320 (specific heat) #2) How do I find heat vaporitzation for q2?

Science
Ten pounds of liquid water is at a temperature of 180 degrees F at standard atmospheric conditions. Determine the energy required to convert this to water vapor (steam) at a temperature of 212 degrees F.

stats
here the inter arrival time t~unif(4,8) the for the prob. that there will be watting > 6.5 mint = intgral(from 6.5 to 8 mint of 1/(8-4) ) = .0375

math
A lawn sprinkler covers a rectangular pattern of 20ft x 30ft. 1)If the flow rate of the sprinkler is 2.5 gpm, derive a formula for calculating the time (hours) to apply D inches of water over one 20ft x 30ft area. 2)What are the units on the constant?

math - help please
A lawn sprinkler covers a rectangular pattern of 20ft x 30ft. If the flow rate of the sprinkler is 2.5 gpm, derive a formula for calculating the time (hours) to apply D inches of water over one 20ft x 30ft area. 2)What are the units on the constant?

math
A lawn sprinkler covers a rectangular pattern of 20ft x 30ft. 1)If the flow rate of the sprinkler is 2.5 gpm, derive a formula for calculating the time (hours) to apply D inches of water over one 20ft x 30ft area. 2)What are the units on the constant?

algebra
solve e^x / 3 = 5^x using logs.

math
A triangle has an angle whose sine is equal to sq rt 2/2. The angle is larger than 52 degrees in measure. Find the EXACT measure (in degrees) of the angle.

Econ more help please
See question below at **** Suppose local govt decides that a tax is the best way to address the inefficiency created by outdoor concerts. Assuming the social cost curve and the private cost curve are parallel to each other, how much does the tax on concerts have to be to ...

Econ - urgent please help
Suppose local govt decides that a tax is the best way to address the inefficiency created by outdoor concerts. Assuming the social cost curve and the private cost curve are parallel to each other, how much does the tax on concerts have to be to achieve the socially optimal ...

Econ please help
Suppose local govt decides that a tax is the best way to address the inefficiency created by outdoor concerts. Assuming the social cost curve and the private cost curve are parallel to each other, how much does the tax on concerts have to be to achieve the socially optimal ...

algebra
Town has popultion of 5,000.Number of people infected after t days with a disease is N(t) = 5000/1 + 21.7e^-0.4t Find number initially infected find number infected after 12 days

algebra
Pa^t and Pe^rt are two forms of the same exponential function. One would expect to obtain the same answer for f(18). Explain why you may not get the same answer for f(18) in practice.

math - another ? - exponentials
The two formulas f(t) = Pa^t and f(t) = Pe^rt provide two models for the same exponential growth or decay function. How are the exact values of a and r related? (Hint: Find a formula for a as a function of r)

algebra - exponentials
Pa^t and Pe^rt are two forms of the same exponential function. One would expect to obtain the same answer for f(18) (after finding P and a and P and r). Explain why you may not get the same answer for f(18) in practice.

algebra
$7,000 is invested into two accounts: 4,000 into an account paying 5% interest compounded monthly and $3,000 into an account paying 4.1% interest compounded continuously. compute the total interest earned at the end of 2 years.

Math - logs
I need help solving this because it involves 2 bases: log (base 2) [log (base 5) 25]= ???

algebra
rectangular open-topped box is made from a 9 x 16 piece of cardboard by cutting x-inch squares out of each corner and folding up the sides. What size square should be cut out to produce a volume of 120 cubic inches?? I set it up with 120 = (16-2x)(9-2x)(x) I get to y = 2x^3 - ...

Geometry
2. This cone bottom tank is the perfect solution for transporting chemicals such as pesticides around to various locations. The cone shape of this plastic tank equips it not only for easy draining of materials, but also provides an easy cleaning process. a. What is the volume ...

Geometry
An engineer designed a 620 ft long water canal to drain a rainwater detention pond. It is to have a trapezoid cross-section that is 8 ft deep, 15 ft across the bottom, with walls sloping outward at an angle of 40. (a)Calculate the volume of earth that needs to be ...

Maths
The fuel rods for a certain type of nuclear reactor are bundled into a cylindrical shell. Consider this cross-section showing 19 identical fuel rods: a) If the diameter of the one rod is 2.8cm, calculate the shaded area of the cross-section. b) If the length of the cylindrical...

algebra
So if the distance and height are reachable, why are these equations poor models of hitting a baseball: y = -0.5x^2 + 216x + 3 y = -0.002x^2 + 0.879x + 3.981 y = -0.002x^2 + 0.8732x - 3.981

algebra
why are these equations poor models of hitting a baseball: y= -0.002x(x-433.1) I get maximums of (216,93). Other problems' maximums are in the (220, 100)range. So are they poor models because the distance and heights are unreasonable? 2) Why is the constant a in y=ax^2 + ...

algebra
In a real-life situation, to model the distance x and the height of hitting a baseball y as in: y = ax^2 + bx + c 1. When dealing with the initial height of the ball, what is happening when x = 0? Is it that the ball has not yet traveled any distance? 2. What are the possible ...

mba
Find the maximum and minimum values of the following function. 8x3 – 75x2 + 150x

physics
What happens to the size of a hole in a metal plate when the plate is heated / cooled

physics
How do we compensate for thermal expansion /contraction in the construction of railway tracks? How do we compensate for thermal expansion /contraction in the construction of steel bridges? How do we compensate for thermal expansion /contraction in the construction of metal ...

physics
Describe briefly how the volume of a given mass of water changes when it is cooled from 7 ^0 C to 1^0 C use the terms increase, decrease and maximum or minimum

physics
At what temperature is the density of water MAXIMUM ? Why does water have a maximum density ( Other liquids do not)

physics
A liquid expands on heating. Explain briefly how its density will change with rise in temperature

physics
liquids in general expand on heating but when water in an ordinary glass flask with a narrow neck is heated the level is found to first fall and then rise why ?

physics
Name Two solid materials having very low linear expansivity ?

MBA I/ Semester I math
Differentiate following with respect to x f(x) = (3x^2 – 5ax + a^2)^4

physics
What happens to the size of a hole in a metal plate when the plate is heated / cooled

physics
How do we compensate for thermal expansion /contraction in the construction of metal pipes for carrying steam?

physics
How do we compensate for thermal expansion /contraction in the construction of steel bridges?

physics
How do we compensate for thermal expansion /contraction in the construction of railway tracks?

physics
Describe briefly how the volume of a given mass of water changes when it is cooled from 7 ^0 C to 1^0 C use the terms increase, decrease and maximum or minimum

physics
At what temperature is the density of water MAXIMUM ? Why does water have a maximum density ( Other liquids do not)

physics
A liquid expands on heating. Explain briefly how its density will change with rise in temperature

physics
Name Two solid materials having very low linear expansivity ?

physics
liquids in general expand on heating but when water in an ordinary glass flask with a narrow neck is heated the level is found to first fall and then rise. why?

MBA I/ Semester I math
Differentiate following with respect to x. (3x2 – 5ax + a2)4

mba
Differentiate following with respect to x. (3x2 – 5ax + a2)4

physics
If velocity v of particle moving in straight line is related with distance travelled S as v=2(1+S)^1/2. Find the acceleration of the particle.

physics
A partical is projected vertically upward with speed 20 m/s. What will be the time after particle is at a height 15m above the ground( g=15 m/s*s)

physics
A non stop bus goes from one station to another at a speed of 54 km/h. The bus returns from the second station to first station at a speed of 36 km/h. Find the average speed of the bus.

geometry
find the equation to the plane through the point (-1,3,2) and perpendicular to the plane (x+2y+2z=5) and (3x+3y+2z=8)

math
first of all multiply 11 by 3 we get 33 now we add 1 to 33 , we get 34 so the result is - 34 / 3 the negative sign is with the whole term so it will remain with the whole fraction

physics
2.5 kg rifle fires a 20 g bullet at 400 m/s. Find magnitude of the recoil velocity of the rifle.

physics
Star Z has 1/5 the radius of Earth and 1000 times the Earth's mass. If a mass weighs 1.0 N on Earth, what does it weight on Star Z? Thank you.

physics
A chain of length l and mass ë per unit length is fully open and is held on a high frictionless table with y1 of its length hanging from the side of the table as shown in figure. When released, it starts slipping off the table. By calculating the speed of the chain as it ...

physics
A small stone of mass m is stuck on the periphery of a wheel of radius R rolling along the x-axis with a constant speed v. The centre of the wheel was at x = 0 at time t = 0, and stone was on the ground at that time. Find the angular momentum of the stone and its rate of ...

social studies
1-b,2-c,3-c,4-d, 5-a, 6-b, 7-a

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