Heat given to a body which raises its temperature by 1°C is

Anonymous User Physics Thermodynamics 04 Apr, 2020 57 views

An insulated container of gas has two chambers separated by an insulating partition. One of the chambers has volume V1 and contains ideal gas at pressure P1 and temperature T1. The other chamber has volume V2 and contains ideal gas at pressure P2 and temperature T2. If the partition is removed without doing any work on the gas, the final equilibrium temperature of the gas in the container will be

Anonymous User Physics Thermodynamics 04 Apr, 2020 71 views

Area bounded by the curve y = x + sinx and its inverse function between the ordinates x = 0 and  in sq. units is

Anonymous User Maths Area 02 Apr, 2020 71 views

Area of the region bounded by y = |x| and y = 1 - |x| in sq. units is

Anonymous User Maths Area 02 Apr, 2020 60 views

Area of the region bounded by y = |x| and y=2 in sq. units is

Anonymous User Maths Area 02 Apr, 2020 61 views

The area bounded by , axis of abscissa and two ordinates corresponding to two points of minima of the function y = f(x) is

Anonymous User Maths Area 02 Apr, 2020 62 views

The area bounded by   and  is

Anonymous User Maths Area 02 Apr, 2020 57 views

The area enclosed between the curve  and the co-ordiante axes is

Anonymous User Maths Area 02 Apr, 2020 58 views

The area (in square units) of the region bounded by

is

Anonymous User Maths Area 02 Apr, 2020 66 views

The area bounded between the parabolas  and  , and the straight line y = 2 is

Anonymous User Maths Area 02 Apr, 2020 63 views

The area bounded by the curves  and is

Anonymous User Maths Area 02 Apr, 2020 67 views

The area bounded by the curves y=cosx and y=sin x between the ordinates x=0 and

Anonymous User Maths Area 02 Apr, 2020 63 views

The area under the curve  with boundaries as X-axis and the ordinates x = 0, x = 3 in sq. units is

Anonymous User Maths Area 02 Apr, 2020 63 views

The area (in square units) bounded by the curves  , x-axis and lying in the first quadrant is

Anonymous User Maths Area 02 Apr, 2020 67 views

A body is thrown vertically up to reach its maximum height in t seconds. The total time from the time of projection to reach a point at half of its maximum height while returning (in seconds) is

Anonymous User Physics 02 Apr, 2020 94 views

Calculate rms speed of O2 at 273 K and 1 * 10^5Pa pressure. The density of O2 under these conditions is 1.42 kg m–3.

Anonymous User Chemistry 01 Apr, 2020 286 views

Calculate the pressure exerted on the walls of a 3 litre flask when 7 gms of N2 are introduced into the same at 27°C.

Anonymous User Chemistry 01 Apr, 2020 80 views

Explain the following
a) Although Au is soluble in aqua-regia, Ag is not
b) Zinc and hot copper is used for recovery of Ag from the complex [Ag(CN)2]–

c) Aluminium metal is frequently used as a reducing agent for extraction of metal such as chromium manganese etc.

d) Partial roasting of sulphide ore is done in the metallurgy of copper.

Anonymous User Chemistry Matallurgy 31 Mar, 2020 70 views

Cinnabar (HgS) and galena (PbS) on roasting often gives their respective metals but zinc blende (ZnS) does not. Explain.

Anonymous User Chemistry Matallurgy 31 Mar, 2020 78 views

Aluminium cannot be prepared by the electrolysis of aqueous solution of its salts. Why?

Anonymous User Chemistry Matallurgy 31 Mar, 2020 64 views

Write short notes on Amalgamation , Hydrometallurgy, Self reduction, Electrolytic reduction?

Anonymous User Chemistry Matallurgy 31 Mar, 2020 65 views

If two tangents drawn from a point P to the parabola y2 = 4x are at right angles, then the locus of P is

Anonymous User Maths Parabola 31 Mar, 2020 69 views

A person is to count 4500 currency notes. Let an denote the number of notes he counts in the nth minute.If a1 =a2 =...=a10 =150 and a10, a11,....arein an A.P. with common difference –2, then the time taken by him to count all notes is

Anonymous User Maths Sequences and Series 31 Mar, 2020 59 views

The line L given by   passes through the point (13, 32). The line K is parallel to L and has the equation

.Then the distance between L and K is?

Anonymous User Maths Linear Programming 31 Mar, 2020 67 views

The area bounded by the curves y = cosx and y = sinx between the ordinates x = 0 and x = 3π/2 is

Anonymous User Maths Integral Calculus 31 Mar, 2020 63 views

Solution of the differential equation cosxdy = y(sinx – y)dx, 0 < x < p/2 is

Anonymous User Maths Differential Equations 31 Mar, 2020 70 views

Consider the system of linear equations

x1 + 2x2 + x3 = 3

2x1 + 3x2 + x3 = 3

3x1 + 5x2 + 2x3 = 1

The system has

Anonymous User Maths Linear Programming 31 Mar, 2020 73 views

If  and  are the roots of the equation

Anonymous User Maths Quadratic Equation 31 Mar, 2020 57 views

If , then for all real x

Anonymous User Maths Trigonometry 31 Mar, 2020 55 views

Consider 5 independent Bernoulli's trials each with probability of success p. If the probability of at least one failure is greater than or equal to 31/32 , then p lies in the interval

Anonymous User Maths Probability 31 Mar, 2020 62 views

If the mean deviation about the median of the numbers a, 2a, ......., 50a is 50, then |a| equals

Anonymous User Maths Statistics 31 Mar, 2020 60 views

A man saves  200 in each of the first three months of his service. In each of the subsequent months his saving increases by  40 more than the saving of immediately previous month. His total saving from the start of service will be ` 11040 after

Anonymous User Maths Sequences and Series 31 Mar, 2020 65 views

The coefficient of  in the expansion of is?

Anonymous User Maths Binomial Theorem 31 Mar, 2020 56 views

A whistle producing sound waves of frequencies 9500 Hz and above is approaching a stationary person with speed v ms-1. The velocity of sound in air is 300 ms-1. If the person can hear frequencies upto a maximum of 10000 Hz, the maximum value of v upto which he can hear the whistle is

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 62 views

An observer moves towards a stationary source of the sound, with a velocity one­fifth of the velocity of sound. What is the percentage increase in the apparent frequency?

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 57 views

When two tuning forks (fork 1 and fork 2) are sounded simultaneously, 4 beats per second are heard. Now, some tape is attached on the prong of the fork 2. When the tuning forks are sounded again, 6 beats per second are heard. if the frequency of fork 1 is 200 Hz, then what was the original frequency of fork 2?

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 57 views

The displacement y of a particle in a medium can be expressed as:

m, where t is in second and x in the meter.

What is the speed of the wave?

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 65 views

A tuning fork of known frequency 256 Hz makes 5 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per second when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 57 views

A metal wire of a linear mass density of 9.8 g/m is stretched with a tension of 10 kg­-wt between two rigid supports 1 metre apart. The wire passes at its middle point between the poles of a permanent magnet, and it vibrates in resonance when carrying an alternating current of frequency u. The frequency u of the alternating source is

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 64 views

The displacement of a particle varies according to the relation  The amplitude of the particle is

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 54 views

The displacement y of a wave travelling in the x ­direction is given by

where x is expressed in metre and t in second. The speed of the wave­motion, in ms-1 is

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 66 views

Length of a string tied to two rigid supports is 40 cm. Maximum length (wavelength in cm) of a stationary wave produced on it is

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 67 views

A wave  on a string meets with another wave producing a node at x = 0. Then the equation of the unknown wave is

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 57 views

A tuning fork arrangement (pair) produces 4 beats/sec with one fork of frequency 288 cps. A little wax is placed on the unknown fork and it then produces 2 beats/sec. What is the frequency of the unknown fork?

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 63 views

Tube A has both ends open while tube B has one end closed, otherwise they are identical. What is the ratio of the fundamental frequency of tube A and B?

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 65 views

A wave traveling along thex­axis is described by the equation . If the wavelength and the time period of the wave are 0.08 m and 2.0 s, respectively, then a and b in appropriate units are

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 56 views

The speed of sound in oxygen (O2) at a certain temperature is 460 ms-1. The speed of sound in helium (He) at the same temperature will be (assume both gases to be ideal)

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 69 views

A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 53 views

A string is stretched between fixed points separated by 75 cm. It is observed to have resonant frequencies of 420 Hz and 315 Hz. There are no other resonant frequencies between these two. Then, the lowest resonant frequency for this string is

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 59 views

A wave traveling along thex­axis is described by the equation . If the wavelength and the time period of the wave are 0.08 m and 2.0 s, respectively, then a and b in appropriate units are

Anonymous User Physics Waves and Sound Waves 30 Mar, 2020 53 views