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A 0.210-A current is charging a capacitor that has circular plates 15.8 cm in radius. The plate separation is 4.00 mm. (a) What is the time rate of increase of electric field between the plates?
The turbine exit pressure is 10KPa. The overall efficiency of the turbine is 0.83. Calculate the thermal efficiency, the heat rate and the steam and water massflow rates required for an outputof 10M
A He+ ion is placed in an excited state, so that its remaining electron occupies the n=5 state. The electron can make a transition to any lower energy state, thereby giving off a photon.
A cyclotron is sometimes used for carbon dating. Carbon-14 and carbon-12 ions are obtained from a sample of the material to be dated and are accelerated in the cyclotron. If the cyclotron has a magn
Calculate the two longest wavelengths of the incident photons that will experience this sharp drop. The target metal of the photoelectric effect apparatus has a work function of 2.05 eV.
A Hydrogen atom exists in an excited state for typically around 10 nanoseconds. How many revolutions would Bohr's theory suggest that an electron would make in an n = 2 state before decaying?
What is the final temperature of the water, cup, and bear when they reach thermal equilibrium? The specific heats of silver, aluminum, and liquid water are, respectively, 234 J/(kg·K), 910 J/
Find the angle for total internal reflection when light starts in water and reflects off air.
Consider two electric dipoles p1 and p2 located at the origin (0, 0, 0) and on the x-axis at (a, 0, 0) respectively. p1 points in the x-direction: p1 = p^i and p2 points in the z-direction: p2 = p^
Find the quality (x) of a saturated wet mixture with a specific volume of 0.175 ft^3/lbm at a pressure of 1000 psig. State the answer in the proper units. Show all of your work. You need to use a st
If a dielectric material with kappa=3.60 is inserted so that it fills the volume between the plates (with the capacitor still connected to the battery), how much additional charge will flow from the
Calculate the temperature at which the second state becomes stable. For simplicity you may assume that both the change in S and the change in V are zero over these temperature and pressure ranges.
A 97-mW vertically polarized laser beam passes through a polarizer whose polarizing angle is 15° from the horizontal. What is the power of the laser beam when it emerges from the polarizer?
An RLC oscillator circuit contains a 53.0 Ω resistor and a 1.60-mH inductor. What capacitance is necessary for the time constant of the circuit (the 1/e value) to be equal to the oscillat
A sample with a temperature of 106.51 degrees C is dropped into an insulated cup containing water whose mass is the same as the sample and whose temperature is initially 50 degrees C. The sample r
what was the average dose rate 3.5 billion years ago? State the source of all values used in your calculation. Please show all work.
Calculate and compare the electron densities of a piece of aluminum 1 cm thick and a piece of iron of the same density thickness. Show your work.
A neutron passes two points 1.0 meter apart in 1.0 microsecond. Calculate the neutron's energy in units of both joules (J), ergs and electron volts. Please show all work.
A particular material has a dielectric constant of 1.7 and a dielectric strength of 14.0 MV/m. If this material is used between the plates of a parallel-plate capacitor, what is the minimum area of
Two spaceships approach Earth with equal speeds, as measured by an observer on Earth, but from opposite directions. A meterstick on one spaceship is measured to be 60 cm long by an occupant of the o
This process takes place at constant pressure and the heat capacities at constant pressure of water and ice are 4180 and 2090 J/kg deg respectively. The heat of fusion of ice is 3.34x10^5 J/kg. Calc
The combination of two circular, coaxial coils of radius a separated by a distance also equal to a, with equal currents I in each coil circulating in the same direction, is known as a pair of "Helm
An automobile suspension involves both leaf springs with stiffness k and shock absorbers resist motion with a force -uv. The system is critically damped. If a car has mass 2000 kg and has shock abso
You stand at the center of a carousel spinning at rate w. You throw a ball horizontally with some velocity Xdot from height Zo. At a point where the ball has position v = (Xdot, Ydot, Zdot), what is
Explain the function of the activator added in trace quantities to many inorganic scintillators. Why are activators not needed in organic scintillators?