Two young children face each other standing on roller skates. If the first child (mass of 40 kg) pushes off from the second child (mass of 30 kg) to the right with a speed of 4 m/s, what is the speed and direction of the second child

Physics make-up packetname_cle14. an observer hears a sound with a frequency of 400 hz. if the speed of sound is 340 m/s, what is the wavelength of the sound? a. 0.85 mb. 1.2 mc. 2.75 m13.6 m15. as sound travels from steel into air, its speed decreases. if the frequency of the wavedoesn't change, what happens to its wavelength? a. it increases(b) it decreasesc. it remains the samed. there is not enough information given

What are atoms of the same element with varying number of neutrons

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages