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(a) Calculate the lowest energy of the electron in He+. Is it lower than that of H?
(b) If this electron absorbs a photon and makes a transition to the 2p orbital, what is the frequency of the absorbed photon?
The threshold of dark-adapted (scotopic) vision is 8.0 ? 10-11 W/m2 at a central wavelength of 450 nm. how many photons per second enter the eye
A child does 350 J of work while pulling a box from the ground up to his tree house with a rope. The tree house is 6.6 m above the ground
A wire etched onto a computer chip carries a current of 0.000000033 A. In 1.8 milliseconds, how many electrons flow past a point on the wire
The linear impulse delivered by the hit of a boxer is 248 N • s during the 0.373 s of contact. What is the magnitude of the average force exerted on the glove by the other boxer? React in units of N
A 92.0-kg astronaut and a 1200-kg satellite are separated from the space ship, and are both at rest with respect to the ship without any method of getting to the ship. how far away from the ship is the satellite
While looking through the Mt. Palomar telescope, you discover a large planetary object orbited by a single moon. calculate the density of Planet Hephaestus
It eventually launches horizontally off of the table and takes the path of a projectile until it hits the ground 40 centimeters from the edge of the table.
You are driving along a highway at 25.5 m/s when you hear a siren. You look in the rear-view mirror and see a police car approaching you from behind with a constant speed, How fast was the police car moving
The angular velocity of a wheel is given by %uDBC0%uDF9D(t) = (2.00 rad/s2)t + (1.00 rad/s4)t3. What is the angular acceleration of the wheel as a function of time
A 40 g rifle bullet travelling 260 m/s buries itself in a 4.0 kg pendulum hanging on a 3.0 m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of pendulum's displacement.
An open-tube mercury manometer is used to measure the pressure in an oxygen tank. The atmospheric pressure is 1020mbar .1 bar = 105 N/m2. Determine the absolute pressure (in Pa) in the tank
An electron is accelerated through a potential difference of 10 Megavolts. By what factor has the mass of the electron increased
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