A person runs up 40 stairs and then come down 10 steps
So total stairs upwards is given as

now here we will have total height reached


Now total energy used or mechanical work done is


Now the mechanical power is given as


Answer:
The SI unit of pressure is Pascal .
Answer:
An isotope is one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behavior but with different atomic masses and physical properties. In medicine, for example, cobalt-60 is extensively employed as a radiation source to arrest the development of cancer. Other radioactive isotopes are used as tracers for diagnostic purposes as well as in research on metabolic processes.
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