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A hydrogen atom is initially at n =3 state. How much energy is required to ionize this atom
An x-ray photon with wavelength 5.0 pm collides with a free electron initially at rest. find the maximum possible kinetic energy acquired by the electron
Use standard enthalpies of formation to determine ?Horxn for: 3NO2(g) + H2O(l) ? 2HNO3(aq) + NO(g) Enter in kJ. Find the change in internal energy for this reaction. Enter in kJ.
To make a simple microscope a student places two converging lenses of +20 D at opposite ends of a 34 cm long tube. What is the tube length of the microscope
An object is located 15 cm in front of (to the left of) a converging lens with a focal length of 10 cm. To the right of the converging lens, What is the location of the final image
X-rays having an energy of 350 keV undergo Compton scattering from a target. The scattered rays are detected at 37.0° relative to the incident rays. Find the energy of the recoiling electron
Consider diving 30.0m below the surface of the ocean (density 1.03 grams/cc). what is the gauge pressure at that depth
A down jacket has a surface area of 0.75 m2 and is filled with a 4.1 cm thick layer of down, At what rate is heat conducted through the coat
The super ball is not replaced by a clay ball the same size and mass. The ball is dropped from the same height and it sticks to the table. Calcluate the impulse exerted on the clay ball
A head-butter can accelerate himself from rest to head-butting speed of 8.5 m/s, At the moment of impact, what impulse does the head butter produce
You are driving north on 107th Avenue at a speed of 28.7 mph. At what frequency do you year the siren
calculate the altitude of geosynchronous satellite, calculate the speed needed to move this mass from the surface fo the Earth to the altitude of 3R_E
Water flows through a 4 cm diameter pipe at 4 m/s and with a gauge pressure of 2 atm. what will be the pressure in the narrower pipe
A photon with energy 1.85 eV is absorbed by a hydrogen atom. Find the speed of the electron released from the state in part (a) when it is far from the nucleus
A 1.08 g sample of caffeine, C8H10N4O2, burns in a constant-volume calorimeter that has a heat capacity of 7.85 kJ/K. The temperature increases from 298.55 K to 303.37 K. What is the molar heat of
When a ceiling fan rotating with an angular speed of 5.6 rad/s is turned off, What is the moment of inertia of the fan
The volume flow rate in an artery supplying the brain is 3.0 x 10-6 m3/s. If the radius of the artery is 5.4 mm, determine the average blood speed
A tow truck is pulling a car out of a ditch by means of a steel cable (Y = 2.0 x 1011 N/m2) that is 8.24 m long and has a radius of 0.402 cm. How much has the cable stretched
Solve an equilibrium problem (using an ice table) to calculate the pH of each solution. A solution that is 0.20 M in HCHO2 and 0.14M in NaCHO2
What percentage of the 131I released by the explosion would have remained by that time? Use the first order kinetic equation: [A] = [A]o e-kt
Two physical pendulums (not simple pendulums) are made from meter sticks that are suspended from the ceiling at one end. Determine the period of the wood pendulum
A simple pendulum is made from a 0.691-m-long string and a small ball attached to its free end. how much time elapses before it attains its greatest speed
When responding to sound, the human eardrum vibrates about its equilibrium position. What is the maximum acceleration of the eardrum
The sun moves in an orbit about the center of the Milky Way Galaxy at a speed of 290 km/s with a radius of 3 x 1020 km. How many stars are in the galaxy
During a violent storm, the wind over a flat, 200 m2 roof has a velocity of 10 m/s. What is the net force on the roof