Which reaction is a single replacement reaction? ? a. 2h2+o2-2h20b. 2h202-2h20+o2c. koh+hci+h2od. cu+ 2agno3- 2ag +cu(no3)2

Asuppose a suitcase has a mass of (m) 30 kg and a net force (n) of 10 kg*m/s. what is the acceleration rate of the suitcasein m/s? show your work to support your answer.

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?