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An electron decays from the n = 4 orbit to the n = 1 orbit in the hydrogen atom. If the work function of aluminum is 4.3 eV, does the ensuing photon have enough energy to knock an electron out of aluminum? If so what is the wavelength of the electron that comes out of the aluminum?
What is an initial and final energy of the system energy? It takes .005 seconds for the bullet to embed itself into the block. What is an average impact force it experience.
A 2.5-kg cart is rolling along a frictionless, horizontaltrack towards a 1.5-kg cart that is held initially at rest. Thecarts are loaded with strong magnets that cause them to attract oneanother. Thus, the speed of each cart increases.
you are given a slide with two slits cut into it and asked how far apart the slits are. you shine white light on the
two small plastic balls hang from the threads of negligible mass. each ball has a mass of 0.14 g and a charge of
36 kg of a liquid metal with a latent heat of fusion of 33.18 kJ/kg freezes while at its melting temperature of 398 °C. Calculate the change in entropy of the metal
A 0.26 kg rock is thrownvertically upward from the top of a cliff that is 33 m high. Assuming thatair resistance can be ignored, find the initial speed of the rock
A train at rest emits a sound at a frequency of 1000 Hz. What is the frequency heard by the observer
A cylinder with a moveable piston holds 2.71 mol ofargon at a constant temperature of 307 K. Calculate the heat added to the gas
the electric potential at a position located a distance of 18.9 mm from a positive point charge of 8.70times10-9c and
Consider a swinging pendulum with length l= 10 cm, a mass of 1 gm swinging at the end of it with an amplitude, Calculate the total energy ( potential plus kinetic) in ergs of the swinging pendulum
An expansion process on a diatomic ideal gas , has a linear path between the initial and final coordinates on a pV diagram. The coordinates of the initial state are: the pressure is 300 kPa, the volume is 0.060 m3, and the temperature is 390 K.
The power of lightbulb is 100 Watts. I found the intensity of lightbulb which is about 812 Watt/m^2. Using these information, find the intensity of the Sun
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