Answer the following questions :
If the value of g suddenly becomes twice its value , it will become two times more difficult to pull a heavy object along the floor. why ?

If the value of g suddenly becomes twice its value,it will become two time more difficult to pull a heavy object along the floor.Why?

Answer the following questions : Does the value of g depend on the mass of the falling body ? why ?

Answer the following questions : Explain why the value of g is zero at the centre of the earth.

Answer the following questions : Explain why the value of g changes if we go inside the earth ?

Answer the following questions : Does the value of g change while going deep inside the earth ? why ?

Answer the following questions : Explain the factors affecting the value of g.

Answer the following questions : If g =GM /r^2, then where will the value of g be high, at Goa Beach or on the top of the Mount Everest ?

Answer the following questions : What is the difference between mass and weight of an object ? Will the mass and weight of an object on the earth be the same as their values on Mars ? why ?

Choose the correct alternative answer for the following question What is the value of |5 times 3 -(7 times 2) times 4| ?

Veena observes that during winter setting of milk into curd takes more time while during summer, the same process happens faster. She asks about this difference in time taken to her elder sister. She also asks her sister about why certain reactions occur rapidly while others occur slowly. Her sister explains her about the various factors that affect the rate of chemical reactions. Based on the above scenario, answer the following questions. The reaction of aluminum metal with dilute hydrochloric acid takes place faster as compared to zinc metal. What could be the reason for this difference?