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Think the Bohr energy expression (Equation 30.13) as it applies to singly ionized helium He+ (Z=2) and an ionized atom with Z=4 and only a single electron orbiting the nucleus. This expression predicts equal electron energies for these two species for certain values of the quantum number n (the quantum number is dissimilar for each species). For quantum numbers less than or equal to 9, what is the highest energy (in electron volts) for which the helium energy level is equal to the ionized atom energy level?
Sam's job at the amusement park is to slow down and bring to a stop the boats in the log ride. how much work does Sam do to stop it
Many cultures around the world still utilize a simple weapon called ablowgun, a tube with a dart that fits tightly inside. A sharp breath into the end of the tube launches the dart. When exhaling powerfully, a healthy person can supply air at a gauge..
Mary and her younger brother Alex decide to ride the carousel at the State Fair. Mary sits on one of the horses in the outer section at a distance of 2.0 m from the center. What is Mary's angular speed M and tangential speed vM
A 1000 kg car carrying four 76 kg people travels over a rough "washboard" dirt road with corrugations 4.0 m apart which causes the car to bounce on its spring suspension. The car bounces with utmost amplitude when its speed is 18 km/h. The car now ..
1) Airplane travelers sometimes note that their cosmetics bottles, toothpaste tube, and other containers have leaked through a flight (when flown in cargo hold- checked baggage) what may cause this? When blood pressure is measured, why should the blo..
You apply a constant force F? =(?68.0N)i^+(36.0N)j^ to a 400kg car as the car travels 47.0m in a direction, How much work does the force you apply do on the car
A 20 g bullet inelastically collides with a 3 kg wooden block at rest. find How much energy is lost in the collision
questionthink the sun to be at the origin of a xy-coordinate system. a telescope spots an asteroid in the xy-plane at a
A 10 kg object is moving at 6.36 m/s. The object passes 3m over rough surface with a frictional force of 20 N. How far does the object compress the spring
You are standing at x=9.0km Lightning bolt 1 at x=0km and lightning bolt 2 at x=12.0km Both flashes reach your eye at the same time. what is the time difference between the two flashes
A long, straight wire lies along the y-axis and carries a current of 10.4 A in the positivey direction. A second long, straight wire, parallel to the first and 9.5 cm to the right, carries a current of 5.10 A in the negativey direction. At what worth..
A concave mirror (f = 49 cm) produces an image whose distance from the mirror is one-fourth the object distance. Determine the object distance.
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