A book leans against a crate on a table....

A book leans against a crate on a table. Neither is moving Which of the following statements concerning this situation is/are incorrect.
.

The force of the book on the crate is lessthan that of crate on the book .

Although there is no friction acting on the crate there must be friction acting on the book or else it will fall .

The net force acting on the book is zero

The direction of the frictional force acting on the book is in the same direction as the frictional acting on the crate .

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The correct Answer is:

A, B, D

Application of newton's first law and second law .

Which of the following statements concerning the electrostatics is correct -

electric line of force never intersect each other

electric lines of force start from positive charge and end at the negative charge

electric lines of force start or ends perpendicular to the surface lines of force start or ends perpendicular to the surface of a charged metal

all of the above

Virtual memory is the space on the hard drive where to the O.S. begins to store data when it because memory bound

Accessing data from RAM is slower than accessing data from virtual memory

Both of these

If a computer is memory bound, adding more RAM will not solve the problem

Angular quantum number determines the three dimensional shape of the orbital

The pincipal quantum number determines the orientation and energy of the orbital

Magnetic quantum number determines the size of the orbital

Spin quantum number of an electron determine the orientation of the spin of electron relative to the chosen axis