A 0.05 Kg piece of coper at 95C is placed in water at 20C. The final temperature if 23.5C, what was the mass of the water?

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem