Solve the problem. An apple drops from a tree and falls a distance of 3.4m on Earth- how fast is it going when it hits?​

Your pendulum clock which advances 1.0 s for every complete oscillation of the pendulum is running perfectly on earth at a site where the magnitude of the acceleration due to gravity is 9.80 m/s2. you send the clock to a location on the moon where the magnitude of the acceleration due to gravity is 1.65 m/s2.

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.

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?