Answer:
Explanation:
here it is given that the crate is sliding down with constant speed
so we will have
now we can say
so here we have
a = 0
now from Newton's II law we can say that sum of all forces on the system is always product of mass and its acceleration
so here we will have
Answer:
Explanation:
a ) At constant pressure , work done = P x Δ V
= 200 x 10³ x ( .1 - .04 )
= 12 x 10³ J .
b )
At constant temperature work done
= n RT ln v₂ / v₁
= PV ln v₂ / v₁
= 200 x 10³ x .04 ln .1 / .04
8 x 10³ x .916
= 7.33 x 10³ J .
Answer:
Few millimeter thick aluminium, water, wood, acrylic glass or plastic.
Explanation:
The materials that are best for protection against beta particles are few millimeter thickness of aluminium, but for the high energy beta-particles radiations the low atomic mass materials such as plastic, wood, water and acrylic glass can be used.
These materials can also be used in personal protective equipment which includes all the clothing that can be worn to prevent any injury or illness due to the exposure to radiation.
Answer:
Explanation:
= number of polarizers through which light pass through = 5
= Angle between each pair of adjacent polarizers
= Intensity of unpolarized light
= Intensity of transmitted beam after passing all polarizers
It is given that
we know that the intensity of light after passing through "n" polarizers is given as
inserting the values
