PW Solutions

\( \mathrm{P} \) is (1) (2) (3) (4)....

Obtain the binding energy (in MeV) of a nitrogen nucleus (_7^14 N), given m(_7^14 N)=14.00307 u {...

Name any three viruses, which have RNA genetic material.

Enzyme required for removing RNA primer during DNA replication is (1) Primase (2) Ligase (3) DNA...

After fast running, man has fast heartbeat, slow pulse and shallow breathing. In such conditions...

Which of the following element is a component of ferredoxin? (a) Copper (b) Manganese (c) Zinc

A mixture of amylose and amylopectin is called: a. Lactose b. Starc...

In Balmer series of emission spectrum of hydrogen, first four lines with different wavelength H_α...

Find a unit vector perpendicular to both the vectors \( (2 \hat{i}+...

The unit vector perpendicular to vectors \( \hat{i}-\hat{j} \) and \( \hat{i}+\hat{j} \) forming...

Social exclusion can be both a cause asell as consequence of poverty. Explain.

Assertion (A) Ear muscles of external ear in man are poorly developed. Reason (R) These muscles ...

Which of the following elements has the maximum electron affinity? (a) I (b) Br (c) Cl (d) F (199...

The bulk modulus of a spherical objects is B. If it is subjected to uniform pressure , the fr...

An integer is chosen between 0 and 100 . What is the probability that it is (i) divisible by 7 ? ...

A sample of radioactive element containing 4 × 10^16 active nuclei. Half life of element is 10 da...

Which of the following functions has finite number of points of discontinuity in R([·] represents...

, Density ofhich of the following element is highest : (A) Pt (B) Hg (C) Mn (D) Cu, ,

The half-life period for a first order reaction is: a. Independent ...

What is a parking orbit?

The vector sum of the forces of 10  N and 6  N can be (1) 2  N (2) 8  N (3) 18  N (4) 20  N.

The charge balance equation of species in \( 0.100 \mathrm{M} \) acetic acid solution is given b...

An angular magnification (magnifying power) of 30 X is desired using an objective of focal length...

Find the volume of the parallelopiped whose sides are given by the ...

Prove that: \[ \sin 10^{\circ} \sin 30^{\circ} \sin 50^{\circ} \sin 70^{\circ}=\frac{1}{16} \]

The half-life of a radioactive isotope X is 20 yr. It decays to another element Y which is stable...

Prove that \( \sin 10^{\circ} \sin 30^{\circ} \sin 50^{\circ} \sin ...

pProve that the lengths of two tangents drawn from an external point to a circle are equal./p

The lengths of two tangents drawn from an external point to a circl...

If the system of linear equations \[ \begin{array}{l} 2 x+3 y-z=-2 \\ x+y+z=4 \\ x-y+|\lambda| z...

What is difference between magnification and angular magnification ...

The height y and the distance x along the horizontal plane of a projectile on a certain planet (w...

The lengths of two tangents drawn from an external point to a circle are 0. \( \equiv 0^{\circ} \) P

Prove that the angle between the two tangents drawn from an external point to a circle is supplem...

In Fig a square is inscribed in a circle of diameter d and another square is circumscribing the c...

The minimum value of determinant \( \Delta=\left|\begin{array}{ccc}...

The distance of the \( z \)-axis from the image of the point \( M \) \( (2,-3,3) \) in the plane...

In a regular polygon of \( n \) sides, each corner is at a distance...

A graph is drawn between velocity and time for the motion of a particle. The area under the curve...

If \( P= \) power delivered by a motor is dependent of force \( =F \), velocity \( =v \) and den...

The area under velocity-time graph for a particle in \( \mathrm{P} ...

Resistance of \( p-n \) junction is low when forward biased and high when reverse biased.

Find an anti derivative (or integral) of the following functions by the method of inspection. cos...

Taking force, length and time to be the fundamental quantities find the dimensions of (a) density...

Three vectors \( \vec{A}, \vec{B} \) and \( \vec{C} \) add up to zero. Find which is false. (A) ...

, , I. A, B and C are vectors having a unit magnitude.If A⃗+B⃗+C⃗=0 then A⃗·B⃗+B⃗·C⃗+C⃗·A⃗ will b...

A chromosome having sub- terminal centromere is called (A) Telocentric (B) Acrocentic (C) Metace...

How can you calculate the following? (i) Speed from distance-time graph. (ii) Acceleration from v...

If the angle between two tangents drawn from an external pointto a circle of radius a and centre ...

Prove the following : sin 10^∘sin 30^∘sin 50^∘sin 70^∘=1/16

If the arithmetic mean of the roots of the equation x^2-6 x+8=0 is