The free end of a torsional spring deflects through 90° when subjected to a torque of 4 n-m. the spring index is 6. determine the coil wire diameter and number of turns with the following data: modulus of rigidity 80 gpa ; modulus of elasticity 200 gpa; allowable stress = 500 mpa.

i think the answer is a, hope this : )

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer

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.