A vessel contains a mixture of milk and water in the respective ratio of 10 : 3. Twenty-six litre of this mixture was taken out and replaced with 8 litre of water. If the resultant respective ratio of milk and water in the mixture was 5 : 2, what was the initial quantity of mixture in the vessel ? (in litre)

Anonymous User Maths SBI PO 30 Jun, 2018 800 views

The cost price of item B is Rs. 150/- more than the cost price of item A. Item A was sold at a profit of 10% and item B was sold at a loss of 20%. If the respective ratio of selling prices of items A and B is 11 : 12, what is the cost price of item B?

Anonymous User Maths SBI PO 30 Jun, 2018 1940 views

A parallel plate capacitor of capacitance 10 is connected to a emf 10 volt and fully charged. Now a dielectric slab (k = 3) of thickness equal to the gap between the plates, is completely filled in (slowly)the gap, keeping the cell connected. During the filling process?

(a) The increase in charge on the capacitor is 200

(b) The heat produced is zero

(c) Energy supplied by the cell = increase in stored potential energy + work done on the person who is filling the dielectric slab.

(d) Energy supplied by the cell = increase in stored potential energy + work done on the person who is filling the dielectric slab + heat produced

Anonymous User Physics 28 Jun, 2018 137 views

If a, b, c are rational, show that the roots of the equation are rational.

Gautam Singh Maths 25 Jun, 2018 71 views

An electron of mass initially at rest moves through a certain distance in a uniform electric field in time t1. A proton of mass also initially at rest takes time t2 to move through an equal distance in this uniform electric field. Neglecting the effect of gravity, the ratio t2/t1 is nearly equal to

Anonymous User Physics IIT 22 Jun, 2018 361 views

The variation of specific heat capacity (C) of a solid as a function of temperature (T). The temperature is increased continuously from 0 to 500 K at a constant rate. Ignoring any volume change, the following statement(s) is (are) correct to a reasonable approximation.

(A) The rate at which heat is absorbed in the range 0-100 K varies linearly with temperature T.

(B) Heat absorbed in increasing the temperature from 0-100 K is less than the heat required for increasing the temperature from 400-500 K.

(C) There is no change in the rate of heat absorption in the range 400-500 K.

(D) The rate of heat absorption increases in the range 200-300 K.

Rahul Kumar Physics 16 Jun, 2018 85 views

A steady current I flows along an infinitely long hollow cylindrical conductor of radius R. This cylinder is placed coaxially inside an infinite solenoid of radius 2R. The solenoid has n turns per unit length and carries a steady current I. Consider a point P at a distance r from the common axis. The correct statement(s) is (are)

(A) In the region 0 < r < R, the magnetic field is non-zero

(B) In the region R < r < 2R, the magnetic field is along the common axis

(C) In the region R < r < 2R, the magnetic field is tangential to the circle of radius r, centered on the axis

(D) In the region r > 2R, the magnetic field is non-zero

Anonymous User Physics 16 Jun, 2018 105 views

## Based on the statements given here choose the correct answer. Based on the statements given here choose the correct answer.

P.Gases can be cooled and converted into liquid below its critical temperature by increasing the pressure on it.

Q.Above the critical temperature, a gas (vapour) can not be liquefied however great the pressure it is subjected to

(A)Both P and Q are true and Q explain P

(B)Both P and Q are the true but Q cannot explains P

(C)Only P is true

(D)Q is true

Anonymous User Chemistry 13 Jun, 2018 79 views

If a ball is thrown vertically upward with speed u, the distance covered during the last t seconds of its ascent is:

Devendra Yadav Physics 12 Jun, 2018 237 views

A point charge Q is moving in a circular orbit of radius R in the x-y plane with an angular velocity ω. This can

be considered as equivalent to a loop carrying a steady current Q2ωπ. A uniform magnetic field along the positive

z-axis is now switched on, which increases at a constant rate from 0 to B in one second. Assume that the radius of the orbit remains constant. The application of the magnetic field induces an emf in the orbit. The induced emf is defined as the work done by an induced electric field in moving a unit positive charge around a closed loop. It is known that, for an orbiting charge, the magnetic dipole moment is proportional to the angular momentum with a proportionality constant γ.

Question : The change in the magnetic dipole moment associated with the orbit, at the end of the time interval of the magnetic field change, is?

Anonymous User IIT Physics 06 Jun, 2018 439 views

A thermal power plant produces electric power of 600 kW at 4000 V, which is to be transported to a place 20 km away from the power plant for consumers' usage. It can be transported either directly with a cable of large current carrying capacity or by using a combination of step-up and step-down transformers at the two ends. The drawback of the direct transmission is the large energy dissipation. In the method using transformers, the dissipation is much smaller. In this method , a step-up transformer is used at the plant side so that the current is reduced to a smaller value. At the consumers' end, a step-down transformer is used to supply power to the consumers at the specified lower voltage. It is reasonable to assume that the power cable is purely resistive and the transformers are ideal with power factor unity. All the currents and voltages mentioned are rms values.

Question :

If the direct transmission method with a cable of resistance 0.4 Ω km–1 is used, the power dissipation (in %) during transmission is?

Anonymous User Physics IIT 04 Jun, 2018 894 views

## The radius of the orbit of an electron in a Hydrogen like atom is 4.5a, where a is the Bohr radius The radius of the orbit of an electron in a Hydrogen like atom is 4.5a, where a is the Bohr radius.Its orbital angular momentum is .It is given that h is Plank constant and R is Rydberg contant. The possible wavelength(s) when the atom de-excites, is (are)?

Anonymous User Physics IIT 03 Jun, 2018 1020 views

## Body falling Two ball of the same waight but different area which tuch the ground first if they loose from hight

Anonymous User Physics 26 May, 2018 69 views

Circle(s) touching x-axis at a distance 3 from the origin

and having an intercept of length on y-axis is (are)

Devendra Yadav Maths 06 May, 2018 739 views

Let PQ be a focal chord of the parabola The tangents to the parabola at P and Q meet at a point lying on the line y = 2x + a, a > 0.

1.Length of chord PQ is?

2.If chord PQ subtends an angle θ at the vertex of y2 = 4ax, then tanθ =

Devendra Yadav Maths 30 Apr, 2018 2233 views

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Anonymous User Advanced Data Structures 26 Apr, 2018 71 views

## Where did this 8(x+h ) come from If a chord is not ahttps://www.innovayz.com/questions-answers/question-detail?q_code=114&q_detail=If+a+chord%2C+which+is+not+a+tangent%2C+of+the+parabola+y2+%3D+16x+has+the+equation+2x+%2B+y+%3D+p%2C+and+midpoint+%28h%2C+k%29%2C+then+what+is%28are%29+possible+value%28s%29+of+p%2C+h+and+k+%3F+

Anonymous User Maths 06 Apr, 2018 76 views

The function has a local minimum or a local maximum at x =?

abhay rai Maths 15 Mar, 2018 75 views

The synthesis of alkyl fluorides is best accomplished by?

Kavita Pathak Chemistry 14 Mar, 2018 292 views

An organ pipe open at one end is vibrating in first overtone and is in resonance with another pipe open at both ends and vibrating in third harmonic. The ratio of length of two pipes is?

Kavita Pathak Physics 14 Mar, 2018 1936 views

The wheel of a car is rotating at the rate of 1200 revolutions per minute. On pressing the accelerator for 10 seconds it starts rotating at 4500 revolutions per minute. The angular acceleration of the wheel is?

Anonymous User Physics 14 Mar, 2018 1938 views

In a npn transistor electrons enter the emitter in s. 4% of the electrons are lost in the base. The current transfer ratio will be?

Devendra Yadav Physics 14 Mar, 2018 73 views

Hail storms are observed to strike the surface of the frozen lake at with the vertical and rebound at with the vertical. Assume contact to be smooth, the coefficient of restitution is?

Devendra Yadav Physics 12 Mar, 2018 420 views

Explant is required to be disinfected before placing in culture. This is done by?

Preeti Rai Biology 12 Mar, 2018 186 views

What is amount of work done in moving a point charge Q around a circular arc of radius r at the centre of which another point charge q is located?

Rahul Kumar Physics 07 Mar, 2018 1050 views

Calculate the Fermi energy for gold at 0K. The density of gold is , and the molar mass is 197 g/mol.

Rahul Kumar Physics 27 Feb, 2018 182 views

Consider an expanding sphere of instantaneous radius R whose total mass remains constant. The expansion is such that the instantaneous density remains uniform throughout the volume. The rate of fractional change in density is constant. The velocity v of any point on the surface of the expanding sphere is proportional to?

Devendra Yadav Physics 25 Feb, 2018 1429 views