A meter stick balances horizontally on a knife-edge at the 50.0cm mark. With two 5.0g coins stacked over the 12.0cm mark l, the stick is found to balace at the 45.5cm mark. What is the mass of the meter stick?

mass of the scale is 7.44 g

Explanation:

As we know that the meter scale is balanced at 45.5 cm mark when two coins are placed at 12 cm mark

now we can say that the torque due to weight of the coin is balanced by the weight of scale above the knife edge because the scale remains horizontal

so we will have

battery with hi vtge high val resist in series

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.