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High-energy gamma rays can reach a radiation detector by Compton scattering from the surroundings. This effect is known as back-scattering. Show that, when E>> mec2, the back-scattered photon
The minimum stopping distance for a car traveling at a speed of 30m/sand is 60 m including the distance traveled during the driver's reaction time of 0.53 s. What is the minimum stopping distance fo
The CFO estimates that a proposed expansion would require an investment of $3.4 million. What is the WACC for the funds Klose will be raising? Round your answer to two decimal places.
The phase angle of an RLC series circuit with a capacitive reactance of 40 OMEGA, a resistor of 100 OMEGA and a certain inductor at 1000 Hz is 40.0°. The circuit has an inductive reactance of 20
A 120 g ball attached to a spring with spring constant 2.9 N/m oscillates horizontally on a frictionless table. Its velocity is 24 cm/s when x0 = 4.1 cm.What is the amplitude of oscillation? What is
In Bohr model of hydrogen atom, the average kinetic energy of the electron in the first excited state is four times the smaller than in the ground state. For a particle in a box, the kinetic energy
Consider an electron in a box. If the energy of the first excited state is 10 eVlarger than the energy of the ground state, what is the size of the box.
Apply boundary conditions to obtain the minimum energy of the electron in this box. Compare this energy with that of the n = 10 state of hydrogen.
A wave with frequency 2000Hz,and wavelength 0.1m (in some certain medium), what is its speed in this medium?
An athlete swims a length L of a pool in a time t1 and makes the return trip to the starting position in a time t2. If she is swimming initially in the positive x-direction, determine the average ve
Find the average intensity of the microwaves, given they are absorbed over a circular area 20.0 cm in diameter. What is the peak electric field strength of the microwave? What is its peak magnetic f
In order to do this, the astronaut's shuttle must escape the gravity of Earth by firing it's thrusters. What speed, vesc, must the astronaut's shuttle attain to escape the Earth?
A steam pipe is covered with 1.50 cm thick insulating material of thermal conductivity .2000 cal/cm degress C s. How much energy is lost every second when the steam is at 205 degrees C and the surro
If the frequency is variable and the length of the closed (at both ends) tube is fixed at 45 cm, sketch the plastic tube showing the positions of the nodes and anti-nodes for the three lowest resona
A professional diver performs a dive from a platform 10 m above the water surface. Estimate the order of magnitude of the average impact force she experiences in her collision with the water. State
A block of mass 0.222 kg is placed on the end of a spring which has a stiffness of 150. N/m. It is pulled down 2.60 cm and released. What is the frequency of oscillation? What is the period of oscil
In fact she detects only 0.593 times the rate you count and claims that you must be pretty calm in spite of everything that is going on. How fast are you moving with respect to the Moon?
You have a ball on a wire that is twirled in a circular orbit with a radius of 3.3 m, and the centripetal force acting on the ball, that has a mass of 47 kg, is 353 N. What is the speed of the ball
The beam is 4.60 m long and has a mass of 260 kg (excluding the mass of the two supports). Each support is 0.530 m from its end of the beam. In unit-vector notation, what are the forces on the beam
Explain, using either time-dilation or length contraction arguments. If they want to make the trip in 22 y what distance would the person travelling at nearly the speed of light measure (in light ye
You are out on your friend's boat in Mission Bay soaking up rays and fishing for tuna. You have a big fat worm on the end of your fishing line. You are holding your fishing rod so the worm is comple
A particle has a rest mass of 6.64×10^-27 kg and a momentum of 2.10×10^-18 kg m/s. (a) What is the total energy (kinetic plus rest energy) of the particle?
As 771.0 kg copper bar is put into a smelter for melting. The initial temperature of the copper is 300.0 K. How much heat must the smelter produce to completely melt the copper bar? (The specific he
A cylinder fitted with a movable piston contains ideal gas at 27°C, pressure 0.50 x 105 Pa and volume 1.25 m3. What will be the final temperature if the gas is compressed to 0.80 m3 and the pressu
The coefficients of linear expansion of aluminum and steel are 2.4 x 10-5 K-1, and 1.2 × 10-5 K-1, respectively. The temperature is raised to 90°C. The increase in the length of the joined r