Saturday

May 28, 2016
Total # Posts: 44

**Physics**

sound wave of frequency 166 Hz travels with a speed 332 ms−1 along positive x-axis in air. Each point of the medium moves up and down through 5.0 mm. Write down the equation of the wave and calculate the (i) wavelength, and (ii) wave number. How far are points which ...
*March 26, 2016*

**Physics**

The steady-state amplitude of a weakly damped forced oscillator is given by 2 2 2 2 2 2/1 0 0 [( ) 4 ] ( ) ω −ω + ω ω = b f a Depict it as a function of frequency and obtain expression for resonance frequency. Also obtain expression for peak value of ...
*March 26, 2016*

**Physics**

train moving with speed 72 km h−1 emits a whistle of frequency 600 Hz. A person is standing stationary on the platform. Calculate the frequency heard by the person if the train (i) approaches and (ii) recedes away from the listener.
*March 26, 2016*

**maths **

The first term of A.P. of 20th terms is 2and its last term is 59 . Find its 6th term from the end .
*March 14, 2016*

**maths **

The first term of A.P. of 20th terms is 2and its last term is 59 . Find its 6th term from the end .
*March 13, 2016*

**chemistry**

Sir Noman na tapos uka :D
*January 2, 2016*

**st.Xavier's high school**

0.1+2×2.4÷0.2-0.7 1.1×0.1+3.01-1.01
*July 18, 2015*

**physivs**

a body of mass o.1 kg is attached to a spring and placed on a horizontal frictionless table. the spring is stretched 20cm,when a force of 5N is applied .what will be the period of oscillation when the mass is set in motion?
*December 31, 2014*

**physics**

what will be the centipetal acceleration on a man whose mass is 80 kg,when resting on a ground at the equator if the radius of the earth'R' is 6.4x10 power 6 meter.
*December 31, 2014*

**physics**

the speed of an object at the end of 4 successive seconds is 20,25,30 and 35 meters per second,respectively.the acceleration of this object is?
*December 31, 2014*

**physics**

a ball of weight 200 grams,is tied to the end of a cord and whirled in a horizontal circle of radius 0.6 m.if the ball makes five complete revolutions in 2 seconds,what will be the linear speed of the ball?
*December 31, 2014*

**physics**

a rock is dropped from a high brige.at the end of 3 seconds of free fall the speed of the rock is:[in centimeters per second,g=10 m/second square]
*December 30, 2014*

**math**

express 0.003522....in p/q form
*June 24, 2014*

**Maths**

132cm2
*February 11, 2014*

**math**

what is 24/99 to 8 to the exponets
*November 14, 2013*

**maths**

there is a figur given and the triangleABC,D,E,F are respectively find the perimeter of triangleDEF
*August 26, 2013*

**physics**

an aeroplane takes off at an angle of 30 degree to the horizontal. if the component of its velocity is 250 km/h, what is the actual velocity?
*May 4, 2013*

**stats**

A researcher hypothesizes that a new herbal supplement improves memory. A sample of n = 25 college students is obtained and each student takes the supplement daily for six weeks. At the end of the 6-week period, each student is given a standardized memory test, and the average...
*October 23, 2012*

**stats**

For a normal population with µ = 100 and σ = 20: 1. What is the probability of a particular score being greater than 110? 2. What is the probability of a particular score being less than 50?
*October 23, 2012*

**stats**

Given a normal distribution with µ = 80, σ= 5, and given a sample size of n = 25, describe the following characteristics of the sampling distribution: 1. Central tendency 2. Variability
*October 23, 2012*

**stats**

A normal distribution has a mean of µ = 28 with σ = 5. What is the minimum raw score needed to be in the top 25% of the distribution?
*October 23, 2012*

**CHEM AP**

Complete and balance the following equation. MnO4^‾ (aq) + CH3OH(aq) ¨ Mn^2+(aq) + HCO2H(aq) (acidic solution) I KNOW ITS a redox, so i followed the steps and got: 4MnO4^- (aq) + 5CH3OH (aq) + 11H2O (l) + 12H^+ (aq) ¨ 4Mn^2+ (aq) + 5HCO2H (aq) can ...
*September 27, 2011*

**mechanics**

center og gravity of a circle
*July 17, 2011*

**maths**

We can cut a square diagonally in half to get two triangles. Suppose the perimeter of the square is 3cm longer than the perimeter of a resulting triangle. What is the perimeter of the square?
*April 19, 2011*

**Math**

We can cut a square diagonally in half to get two triangles. Suppose the perimeter of the square is 3cm longer than the perimeter of a resulting triangle. What is the perimeter of the square?
*April 19, 2011*

**Chemistry**

Iron metal is formed during the reduction of iron(III) oxide: Fe2O3 + 3CO 2Fe + 3CO2 When 24.3 kg of Fe2O3 react with 14.6 kg of CO and 7.8 kg of Fe are recovered, what is the percent yield for the reaction? Pls.. help I am having a hard time finding the answer. The wordings ...
*April 13, 2011*

**english**

i've to write paragraph on birthdays.main idea is birthdays are fun.
*January 14, 2011*

**Math7**

thank you very much! :)
*January 10, 2011*

**Math7**

A small tectangular box has a width of 18cm and a volume of 720cm. a.)determine the height and the length of the box. b.) is there more than 1 answer? Explain.
*January 10, 2011*

**Math7**

thanks
*January 10, 2011*

**Math7**

poul has 124.8m of encing to build a rectangular pen. He wants the pen to have the largest possible area. Calculate the length and width of the pen to one decimal place. I don't get it at all
*January 10, 2011*

**english**

you just discovered that your new hat is magical.write about your new special abilities
*December 22, 2010*

**english**

december is the month for gift giving.write about a gift that you would like to give to a special person?
*December 22, 2010*

**PHYSICS **

MOMENT OF INIRTIA OF HOLLOW CONE .Q2 MOMENT OF INIRTIA OF SOLID CONE WHOSE DENSITY IS VERING WITH RADIUS .
*November 3, 2010*

**PHYSICS **

MAXIMUM ELLONGATION IN SPRING WHEN THE MASS WITH SPRING IS THROWN WITH VELOCITY 4M FROM EQUILIBRIUM GIVEN THAT K=50 MASS OF BODY IS 5KG
*November 3, 2010*

**Account**

The capital structure of Bombay Refrigeration Company Ltd. Consists of an equity share capital of Rs. 3, 00,000 (share of Rs. 10 par value) and Rs. 3,00,000 10% debentures. Sales increased by 20% from 30,000 to 36,000 units, the selling price is Rs. 10 per unit. Variable cost ...
*October 1, 2010*

**science**

what is a dormancy? i have to write one paragraph.
*May 23, 2010*

**psychology**

What is the name of the type of thinking that humans do naturally? What is the weakness of this type of thinking?
*April 8, 2010*

**chemistry**

GUYS I HAVE A PROJECT DUEE.. AND I HAVE NO IDEAA WHAT TO DOO.. PLEASE HELP MEEE. THIS CHAPTER IS ABOUT ELECTROCHEMISTRY! QUESTION--> I HAVE BEEN LUCKY ENOUGH TO OBTAIN A SHRINKY DINK 2000(FOR THOSE OF YOU IN THE KNOW, OR THOSE OF YOU WHO ARE AROUND ELEMENTARY AGE BOYS, YOU ...
*November 22, 2008*

**chemistry**

Laws passed in some states define a drunk driver as one who drives with a blood alcohol level of 0.08% by mass or higher. the level of alocohol can be determinded byt titrating blood plasma with pottasium dichromate according to the unbalanced redox reaction. igot the balanced...
*November 6, 2008*

**11th grade ..CHEMISTRY**

This is a Quantitative Redox titration. (KMnO4) = 1.8 G.. 500 ML after the experiment we had to record the data of the 3 trials. 1. Trial - VolUme FeSO4 = 10.00 Ml - VOlume KMnO4 11.00 Ml 2. Trial - VolUme FeSO4 = 10.00 ML - VOlume KMnO4 11.15 Ml and we ran outa the solution...
*November 5, 2008*

**CHemistry**

a capsule of vitamin C.. a weak acid, is analyzed by titrating it with 0.425 M sodium hydroxide. it is found that 6.20 Ml of base is required to react with capsule weighing 0.628 g. what is the percentage of vitamin C (C6H8O6) in the capsule?( one mole of vitamin C reacts with...
*October 22, 2008*

**Chemistry**

ASpirin, c9h8o4, is prepared by reating salicylic acid, c7h6o3, with acetic anhydride, c4h6o3, in the reaction. c7h6o3 + c4h6o3---> c9h8o4 + c2h4o2 A student is told to prepare 45.0 g of aspirin. she is also told to use a 55.0 % excess of acetic anhydride and to expect to ...
*September 22, 2008*

**physics**

what is physics?i know that its subject but what is defination of physics? The study of matter, energy, space, and time, and the interactions thereof.
*July 7, 2007*

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