Friction _____.
1 answer:
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Answer:
Explanation:
Given that,
Mass, m = 27 grams
Volume of the substance, V = 15 cm³
We need to find the density of the substance. We know that, the density of an object is given by mass per unit volume. So,
So, the density of the substance is equal to .
Answer:
The value of the angle is .
Explanation:
Given:
The condition for diffraction minima is
where, is the slit-width,
is the angle of incidence,
is the order number and
is the wavelength of the light.
The wavelength of an electron traveling through a medium is governed by de Broglie's hypothesis.
According to de Broglie's hypothesis
Here, is Planck's constant,
is the mass of the electron and
is the velocity of the electron.
For first minimum .
From equation (1), we have