A net force of 15 N north is used to pull an object. If the acceleration of the object 8 m/s2 north, what is the mass of the object?

The density of gold is 19.3g/cm3. what is the volume of a 13 g gold nugget? ( density: d= m/v)

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 best represents the law of conservation of mass ?