A 20.0 cm long test tube and an oscilloscope (a device for measuring frequency) are used to determine the speed of
sound. A student blows air over the open end of the test tube
to allow s 428 Hz vibration to resonate. Assuming the note
produced is at the fundamental frequency, the speed of sound
in the tube is ___ m/s.

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

Me with this and you will be marked brainliest

How many meters will a car travel if its speed is 45 m/s in an interval of 11 seconds? question 2 options: a) 450 meters b) 495 meters c) 4.09 meters d) 498 meters