a microscope is provided with a main scale graduated with 20 division in 1 centimetre and working at scale with 50 revision on it of length same as 49 division on it scale. Find the least count of the microscope

Explain why electric current cannot exist if a current doesn't have a voltage source.

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material

What is the magnitude of the gravitational force acting on the earth due to the sun?