A beam of uniform dimensions 100 m long, suspended by a rope in the center of the center, with weights A, B and C, suspended from one end of the beam at a distance of 5, 40 and 90 m, respectively, if A and B weighs 200 and 100 n. How heavy must the beam C be to be in equilibrium?

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

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.