Otto Cycle Question
The Otto Cycle You have a “standard” Otto cycle. At the start of the adiabatic compression $P=100 kPa$ and $T=25 C$. If the efficiency of this engine is $eta=0.48$ and… Click here to read more
The Otto Cycle You have a “standard” Otto cycle. At the start of the adiabatic compression $P=100 kPa$ and $T=25 C$. If the efficiency of this engine is $eta=0.48$ and… Click here to read more
The Ampere Balance The Ampere Balance is made up from 2 parallel horizontal wires. Wire T is above wire H. Wire T makes a balanced pendulum The upper wire segment… Click here to read more
Photomultiplier Light incident on a photomultiplier cathode has an intensity of $1.2 pW/cm^2$ and an wavelength of $\lambda=450 nm$. The cathode area for light is $0.2 cm^2$ and the photomultiplier has… Click here to read more
The 2N3904 Transistor The current amplification $\beta$ value of the 2N3904 transistor is given by the relation $\beta=1.4T(C)+195$. For a temperature of T=25 C the value of $\beta=230$ from the… Click here to read more
Bumpy road A car with 4 passengers travels on a rough road with “bumps” at a distance $d$ from each other (a bumpy road). Because of these bumps the car… Click here to read more
Nuclear Reactions Please find the value of Q that is released in the nuclear reactions $^{40}Ca rightarrow e^+ + 40K + nu$ $^{98}Ru rightarrow 4He + 94Mo$ $^{44}Nd rightarrow 4He… Click here to read more
Pencil on tip A pencil sits on its point in an unstable equilibrium. The pencil is 18 cm long and has a mass of 7 grams. From a quantum mechanical… Click here to read more
Rolling wheel A full wheel rolls on an inclined plane without slipping. In an experiment, you measure the following experimental data for this rolling wheel: Wheel Radius: $R = (3.25… Click here to read more
The 741 Circuit The schematics of the 741 circuit is presented. It contains a reference current generator made with resistor R5, and transistors Ql1, Q12 and R5. Then R10 and… Click here to read more
The tennis balls The “standard” speed of the tennis balls is 100 mph. At this speed the tennis balls bounce off the tennis rackets. If the speed is sufficiently high,… Click here to read more
The common emiter amplification For the given common emitter transistor amplification circuit, connect the oscilloscope at the in, at the out and at the base ofthe transistor. For the following… Click here to read more
The Stromboli Volcano When the Stromboli volcano is active a big gas bubble rise up in the volcano lava. At some moment when the pressure of the bubble is big,… Click here to read more
Electron wave An electron travels toward negative values of $x$ having a kinetic energy $E=2 eV$. Please write the equation of this electron wave and describe its characteristic values. The… Click here to read more
The Radium 226 nucleus Assume that the activity of a $^{226}Ra$ (Radium 226 nucleus) source is $2.5 Ci$ a) At a distance of 50 cm away from this source, please… Click here to read more
The photoelectric effect of a laser A 360 nm laser with a power of 20 mW produces a photoelectric effect on a certain material. The work function of the anode… Click here to read more
The amplifier Find the values of the first stage components from the two stage amplifier for the conditions: Overall current amplification $A_i=-200$, overall voltage amplification $A_v=-20$, $R_{c1}=R_{in2}$ d) Q point… Click here to read more
The bicycle When you are on a bicycle and you pedal, the chain transfers the rotation to the rear sprocket and from it to the rear wheel. This rear wheel… Click here to read more
Please derive the Bohr model of atom starting from the second Law of Physics ($F=m*a$) Assume hydrogen atom. $Z=+1$ (a single charge $e$ is the nucleus) From Newton law and… Click here to read more
1. The lifetime of a particle in its own reference system frame is $6*10^{-11} s$. In the laboratory system the particle travels 25 m before decaying.To make this experimentally possible… Click here to read more
Two disks are mounted on top of the other and can rotate. A mass $M$ is connected by a string with the smaller disk (of radius $R$) and exerts a… Click here to read more