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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?
The drawing (not to scale) shows one alignment of the sun, earth, and moon. find the magnitude of the net gravitational force on the moon
A simple circuit is set up that only consists of a 12 V battery connected to a light bulb with a resistance of 1 Ohms. What current flows through the light bulb
The nucleus 124 55 Cs has a half-life of 30.8 s and a molar mass of 124 g. What is the initial activity (decay rate) of the sample
A current of 1.00 Amperes is maintained in a simple circuit with a total resistance of 3.00 ohms. How much heat is generated in 4.00 s
A hot-air balloon has a volume of 2741 m3. The density of the air outside the balloon is 1.205 kg/m3. How much weight can the balloon lift
An ideal spring has the spring constant k = 428 N/m. find the distance this spring must be stretched from its equilibrium position for 28 J of work to be done.
A thin film of acetone (n = 1.25) coats a thick glass plate (n = 1.52). White light is incident normal to the film. Calculate the thickness of the acetone film
Double slits of 0.115 mm separation are placed at the front of a lecture room that is 17.1 m long. what is the separation between the first two bright fringes
A cone has radius R = 30.0 cm and is on a horizontal table. The angle formed by the height and side at the vertex = 60.0°. What is the magnitude of the net flux that enters the cone
A proton and an alpha particle after being accelerated through same potential difference enter a uniform magnetic field the direction of which is perpendicular to their velocities
a stone is dropped into a river from a bridge 42.5 m above the water. another stone is thrown vertically down 1.13 s
a rifle with a weight of 25 n fires a 4.0 g bullet with a speed of 290 ms.a find the recoil speed of the rifle.b if a
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