Physics.

p = m/v where m is mass and v is volume and p is density.
buoyant force = weight of fluid = mg = (pv) g where v is volume inside the fluid and p is the density of fluid

Fb is due to the water, drawn opposite direction of mg. Fb = p water multiplied with V block * g


10 = mg - (1000kg/mcubed) (1x10^-3 mcubed) * g

10 = mg- lg where g is 10

20 = mg so m ---> kg

scale reading = (mg-Fb)

p fluid = 2 kg / 2/3 X 10 ^ -3 m^3 = 3x10^3 kg/m^3



Chapter 16/17

A wave is a disturbance that propagates from one place to another. The easiest type of wave to visualize is a transverse wave, where the displacement of the medium is perpendicular to the direction of motion of the wave.

In a longitudinal wave, the displacement is along the direction of wave motion.

ANY traveling wave, wave speed is where v = wavelength / T

V = wavelength * frequency

frequency = 1/t (time)


The speed at which the wave moves depends on how quickly one particle of the string is accelerated upward in response to the net pulling force.

V = square root of (F divided by m/L)


Describing harmonic wave function: since the wave has the same pattern at x + wavelength, as it does at x, the wave must be of the form:

y(x) = A cos ((2pie/wavelength) * X)

ALSO, as the wave propagates in time the peak moves as, x = wavelength (t/T)