Lions can run at speeds up to approximately 80.0 km/h. A hungry 145-kg lion running northward at top speed attacks and holds onto a 24.0-kg Thomson's gazelle running eastward at 60.0 km/h. 1) Find the speed of the lion-gazelle system just after the lion attacks. (Express your answer to three significant figures.)

An electron is traveling with initial kinetic energy k in a uniform electric field. the electron comes to rest momentarily after traveling a distance d. (a) what is the magnitude of the electric field

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.