Ablock of mass m is pushed up against a spring, compressing it a distance x, and the block is then released. the spring projects the block along a frictionless horizontal surface, giving the block a speed v. the same spring projects a second block of mass 4m, giving it a speed of 5v. what distance was the spring compressed in the second case?

Explanation:

By energy conservation we know that spring energy is converted into kinetic energy of the block

so we will have

so we will have

now we will have same thing for another mass 4m which moves out with speed 5v

so we have

now from above two equations we have

so we have

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).

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.