an object of mass 800 gram hangs on a spring calculate the force exerted by the object of acceleration due to gravity is 10m/s square​

The purpose of a lab is to do your "expirements" the importance of the topic is so you can now what the story is about and the last one is because no one is me with my question ( what is 3 over 4 x - 9 = 27 maybe you can )

//(b) both involve the use of levers;

It maybe because uranus is made of gas but uranus has a solid core in the middle