a small rock with a mass 0.20 kg is attachted to the lower wns od a long string and moves in a horixontal circle with radiu 0.6 m. what angle does the string make with vertical

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

What do you think car designers do if the damage caused by a crash test is too severe?

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?