The de broglie wavelength of an electron with a velocity of 6.00 × 106 m/s is m. the mass of the electron is 9.11 × 10-28 g.

Explanation:

The de Broglie wavelength is given by the following formula:

(1)

Where:

is the Planck constant

is the momentum of the atom, which is given by:

(2)

Where:

is the mass of the electron

is the velocity of the electron

This means equation (2) can be written as:

(3)

Substituting (3) in (1):

(4)

Now, we only have to find :

>>> This is the de Broglie wavelength of the electron

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards