It took 2 seconds and 1000 joules
of work for a
weightlifter to lift
a bar weight above
his head. How much
power did this take?

Cggvhb hnxukfhv. lggvkkfvf fkjfr j

The capital letters and lowercase letters smoothly run together without lifting the pen

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.