Determine the photon flux, Suppose that the x rays are emitted from a focal...

Suppose that the x rays are emitted from a focal spot isotropically. The photon flux is 3.28 x 10 6 photons mm -2 sec -1 at a distance of 0.75 m from the focal spot. What is the

Determine the force of the attraction, If the distance between the earth an...

If the distance between the earth and moon were halved, the force of the attraction between them would be: a) One fourth as great b) One half as great c) Twice as g

Forces and nature,

Cosmology., A universe is spatially flat, and contains both matter and a co...

A universe is spatially flat, and contains both matter and a cosmological constant. For what value of Om,0 is t0 exactly equal to H0 -1?

Maxwells equations, Maxwell's equations (J.C. Maxwell; 1864): Four ele...

Maxwell's equations (J.C. Maxwell; 1864): Four elegant equations that describe classical electromagnetism in its entire splendor are following.

What is the principle of an optical fibre, Explain power of a lens. What is...

Explain power of a lens. What is the principle of an optical fibre? What is a thin prism? Describe angular dispersion between two colours for a prism.

Verify the rms potential drops across the three elements, The given circuit...

The given circuit diagram shows a series LCR circuit linked to a variable frequency 230 V source: (a) Verify the source frequency which drives the circuit in resonance. (b) G

Calculate the value of the unknown resistance, In a Wheatstone bridge ABCD,...

In a Wheatstone bridge ABCD, a galvanometer is connected between A and C, and a battery among B and D. A resistor of unknown value is connected among A and B. When the bridg

Evidence for existence of particles, The idea that everything is made up of...

The idea that everything is made up of very small particles has been developed over many years supported by several experiments: (i)                Brownian motion :

Calculate the sunrise local horizon points, This problem examines the seaso...

This problem examines the seasonal solar radiation budget at three geographical locations: the Equator, 40º North, and 80º North. NOTES: At a given geographical location, N