23 A sound wave is detected by a microphone. The output from the microphone is connected to the Y-input of a cathode-ray oscilloscope (c. r.o.). The trace on the c. r.o. is shown.
The time-base is set at 0.20 ms per division.
What is the frequency of the sound wave?
A 1000Hz B 1250Hz C 2000Hz D 2500Hz

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

Apropagating wave in space with electric and magnetic components. these components oscillate at right angles to each other. it may travel in a vacuum. determine the term.