If a bioreactor has a biomass yield of 0.5 g of dry cell weight per liter of medium, and you start with 100 liters of medium, how much total biomass can be harvested? Formula: Biomass yield (g)=Yield (g/L)×Volume (L) 

A parallel-plate capacitor, with air between the plates, is connected across a voltage source. This source establishes a potential difference between the plates by placing charge of magnitude 4.15 x 10-6 C on each plate. The space between the plates is then filled with a dielectric material, with a dielectric constant of 7.74. What must the magnitude of the charge on each capacitor plate now be, to produce the same potential difference between the plates as before?

For the circuit shown in the figure, I = 0.50 A and R = 12 Ω. What is the value of the emf ε? three resistors and battery.jpg

Two square air-filled parallel plates that are initially uncharged are separated by 1.2 mm, and each of them has an area of 190 mm2. How much charge must be transferred from one plate to the other if 1.1 nJ of energy are to be stored in the plates? (ε0 = 8.85 × 10-12 C2/N ∙ m2)

An electron moves with a speed of 8.0 × 106 m/s along the +x-axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of 60° to the +x-axis and lying in the xy-plane. (1 eV = 1.60 × 10-19 C, mel = 9.11 × 10-31 kg) Calculate the magnitude of (a) the magnetic force on the electron. (b) the acceleration of the electron.

An electron accelerates from 0 to  10×104m/s in an electric field. Through what potential difference did the electron travel? The mass of an electron is 9.11×10-31kg and its charge is −1.60×10-19 C.

The hot and neutral wires supplying DC power to a light-rail commuter train carry 800 A and are separated by 75.0 cm. What is the magnitude and direction of the force between 50.0 m of these wires? (Current on both wire move opposite directions)

A capacitor with neoprene rubber as the dielectric stores 0.185mJ of energy with a voltage of 50V across the plates. If the area of the plates is 500cm2, what is the plate separation?

Which relapse process occurs when behavior returns after a context change?

Which of the following best describes resurgence?