An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is A) -30cm B) +30cm C) -15cm D) +15cm

This question is worth 54 points ! rock falls from a ledge to the ground what energy conversion occurs during this process a potential to kinetic b kinetic to potential c thermal to mechanical d chemical to mechanical

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.

Which two particles are found in the center of an atom