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Question 1) The walls of a blackbody cavity are at a temperature of 27oC. What is the frequency of the radiation of maximum intensity? Question 2) Assume that a 100 - W light bulb gives off 2.50% of its energy as visible light. How many photons of visible light are given off in 1.00 min? (Use an average visible wavelength of 550 nm) Question 3) What is the energy of photons (joules) emitted by an 107.5-MHz FM radio station? Question 4) What is the longest wavelength of light that will emit electrons from a metal whose work function is 3.50 eV? Question 5) A metal with a work function of 2.40 eV is illuminated by a beam of monochromatic light. If the stopping potential is 2.5V, what is the wavelength of the light? Question 6) What is the de Broglie wavelength of a 1000 kg car moving at a velocity of 25 m/s? Question 7) A hydrogen atom in its ground state is excited to the n = 5 level. It then makes a transition directly to the n = 2 level before returning to the ground state.
a) What are the wavelengths of the emitted photons?
b) Would any of the emitted wavelengths be in the visible region? Question 8) What is the longest wavelength light capable of ionizing a hydrogen atom in the ground state?
You are playing raquetball at the rec center. When you are 10 m away from the wall you hit a ball 24 m/s towards the wall at an angle of 30 degrees. How high above the launch point does the ball hit the wall
An object is placed 5.0 cm to the left of a converging lens that has a focal length of 20 cm. explain what the resulting image will look like, in terms of image distance, magnification, upright vs inverted, and virtual vs real?
Male mosquitoes in the mood for mating find female mosquitoes of their own species by listening for the characteristic "buzzing" frequency of the female's wing beats
An infinite, non conducting sheet has a surface charge density is +9.78pC/m2. How much work is done by the electric field due to the sheet
Standing waves on a 1.0m long string that is fixed at both ends are seen at successive frequencies of 24 Hz and 63 Hz. What are the wave speed and fundamental frequency?
Sean climbs a tower that is 84.7 m high to make a jump with a parachute. what is the potential energy of Sean
A police car is moving towards you at a speed of 36.0 m/s. Its siren produces a frequency of 850 Hz. What frequency do you hear after it passes by you
A copper rod is fastened securely at both ends to immovable supports. What is the magnitude |?T| of the change in temperature of the rod when it ruptures
An electron and a proton are initially very far apart (effectivelyan infinite distance apart). They are then brought together to forma hydrogen atom, in which the electron orbits the proton at anaverage distance of 5.39*10-11 m.
A "Carnot" refrigerator (reverse of a Carnot engine) absorbs heat from the freezer compartment at a temperature of -17°C, How much work must be done by the refrigerator to change 0.20 kg of water at 24°C into ice at -17°C
A uniform disk has a mass of 3.7 kg and a radius of 0.40 m. The disk is mounted on frictionless bearing and is used as a turntable. What is the final angular momentum of the system
At an absolute pressure of 101.3 kPa and ten mperature of 20 degC the dynamic viscosity of a certain diatomic gas is 2*10^-5 Pa.sec, calculate its approximate relative molecular mass
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