A sound wave in air at 20 Celsius has a frequency of 151 Hz and a displacement amplitude of 5.40×10-3 mm. Part A For this sound wave calculate the pressure amplitude (in Pa).
Use 1.42×105 Pa for the adiabatic bulk modulus.
Pmax= 2.11 Pa
Part B Find the intensity of the wave
Use 1.20 kg/m^3 for the density of air.
I=?

Which notation is used to represent an alpha particle? a. b. c. d.

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system