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If we have two different elements, and each has an electron drop from the first excited state to the ground state, they will both have emission lines. But these lines may be very different between the two elements. Explain how this is possible.
A particle is acted on by two torques about the origin: τ1 has magnitude 10 N m and pointsin the direction of increasing x, and τ2 has a magnitude of 12N m and points in the direction of decreasing y.
Two water reservoirs are open to the atmosphere. The manometer contains mercury with the density of 13,600kg/m cubed. What is the difference in elevation if the manometer reading is 25cm.
A cubic foot of lead that weighs 700 lb is submerged in water. What is the buoyant force acting on it? The volume of one cubic foot of water weighs 62.4 lb
The activation energy for vacancies in Cu is w.28 eV. Find the fractional number of vacancies at the melting temperature. Estimate the contribution of vacancies to the thermal expansion at the melting temperature.
A geostationary satellite is one whose orbit is fixed with respect to the rotating Earth. Where specifically must the satellite be placed
question1two plates detached by a distance 16.8 mm are charged to a potential dissimilarity of 7.25 volts. a constant
Spider-Man attempts to save passengers on an out-of-control train using his web-slinging power. If the train (m = 137,000 kg) was at first travelling at 33m/s and he needs to stop it within 46 s, what is the magnitude of force he must provide.
An object is placed in front of a converging lens in such a position that the lens (f = 16.0 cm) creates a real image located 27.0 cm from the lens. Then, with the object remaining in place, the lens is replaced with another converging lens (f = 18.0..
a given capacitor is connected to a 12.0 v battery and when fully charged stores 2.58 x 10-6 j of energy. if the
A car speeds along the curved exit ramp of a freeway. The radius ofthe curve is 86 m. A 68 kg passenger holds the arm rest of a car door witha 220 N force to keep from sliding across the front seat of thecar.
A car makes a trip due north for three-fourths of the time and duesouth one-fourth of the time. The average northward velocity has amagnitude of 24 m/s, and the averagesouthward velocity has a magnitude of 23 m/s.
A heat engine operates among 40°C and 380°C. Being a real engine, its efficiency is only 60 percent of that theoretically possible for a Carnot engine at these temperatures. If it absorbs heat at a rate of 60 kW, at what rate does it exhaust heat?
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