<span>Science is always defined as the body of knowledge and linked to something
related to the physical world, phenomena and lives of everything that exist on
Earth. Science is categorized in various ways. Pure, practical or theoretical, is the largest
distinction of science or whether
science is applied. Generally, pure
science is subdivided into Physical sciences, Earth sciences, and Life
sciences. Physical sciences deal with
energy and matter, Earth sciences explain Earth’s phenomena, to the solar
system where it belongs and its atmosphere. And finally, life sciences describe
internal processes of living organisms, its relationship to each other and to
its environment.</span>
D) waves are used to transmit the rail signal though the air. these waves are encoded at different frequencies for different stations
Answer:
32 amu is the right choice because both protons and neutrons have a mass of 1 amu. Electrons have no mass so go with the last choice
Given that force is applied at an angle of 30 degree below the horizontal
So let say force applied if F
now its two components are given as
Now the normal force on the block is given as
now the friction force on the cart is given as
now if cart moves with constant speed then net force on cart must be zero
so now we have
so the force must be 199.2 N
