Solved numerical problems If a body moving on a straight line with the velocity of 10 mls and it changes
its velocity to 20 m/s in 2 seconds, what is its acceleration?

Sorry i don’t know what to do

From my calculation, i got 3.655moles

Can you show the

Jenny and fred both play a long note on their trombones. a stationary observer hears the sound increasing and decreasing repeatedly in loudness. which of these must be true? the sound waves from the two trombones have slightly different frequencies.the sound waves from the two trombones have the same frequency.the sound waves from the two trombones have slightly different amplitudes.the sound waves from the two trombones have the same wavelength.the sound waves from the two trombones have slightly different velocities.  lolthe answer is          the sound waves from the two trombones have slightly different frequencies.