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When light of wavelength 300 nm falls on a cobalt surface, electrons having a maximum kinetic energy of 0.24 eV are emitted. Find values for the following.
(a) the work function of cobalt
eV
(b) the cutoff wavelength
nm
(c) the frequency corresponding to the cutoff wavelength
Hz
A pendulum clock that works perfectly on Earth is taken to the Moon. (a) Does it run fast or slow there? (b) If the clock is started at 12:00 midnight, what will it read after one Earth day (24.0 h)? suppose that the free-fall acceleration on the ..
What is the efficiency of a cyclical heat engine in which 65.0 kJ of heat transfer occurs to the environment for every 95.0 kJ of heat transfer into the engine
Neglecting air resistance, how fast is it going when it hits the balloon? Illustrate what is the acceleration of the cannonball just before it hits the balloon?
A silicon rod (at 30 degrees celsius) with a uniform cross section connects to a battery with 9 Volts of terminal voltage and .50 A current flows. what is new resistance of rod
compass needle points 25 degrees E of N outdoors. However, as it is placed 17 cm to the east of a vertical wire inside a building it points 61 degrees E of N. What is the magnitude of the current in the wire? The earth field there is 0.50X10^-4 T ..
A force vector points at an angle of 50.6° above the +x axis. It has a y component of +280 newtons. Calculate the magnitude of the force vector.
If, as is typical, each of them breathes about 500 {rm{ cm}}^3 of air with each breath, approximately what volume of air (in cubic meters) do these astronauts breathe in a year.
Enumerate all the 2S+1LJ terms arising from electronic configuration 1s2 2s2 2p4 (Oxygen). What is the ground state of the system
An object with mass 2.7 kg is executing simple harmonic motion, attached to a spring with spring constant k=280N/m. Calculate the maximum speed attained by the object
A jet aircraft with a mass of 4,675 kg has an engine that exerts a force (thrust) equal to 60,100 N. what is the jet's acceleration
An electron is released from rest at the negative plate between two 10.0 cm long parallel plates separated by 1.00 cm, What is the electron's velocity when it strikes the other plate
For the neutral chlorine atom 35,17 CL, determine the mass number and number of protons
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