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An electron in the hydrogen atom jumps from a level in which the energy is 1.89 eV higher than the energy of the final lower-energy level.
(a) What is the frequency of the light emitted in this transition?
(b) What is the wavelength of the emitted light? What is its color?
A capacitor consisting of two plates separated by a distance d of 4.25 x 10^-3, with an area A of 8.15 x 10^-4 m^2, What is the numerical value of the energy for the capacitor
A 3.8 kg ball is at rest on the floor in a 1.2 m ? 1.2 m ? 1.2 m room of air at STP. Air is 80% nitrogen (N2) and 20% oxygen (O2) by volume. What is the thermal energy of the air in the room
A tennis ball is hit with a speed of 27 m/s at an angle of 45o. It lands on the flat roof of a 13-m-tall building. What is its velocity at landing
A 1200-turn coil of wire that is 2.0cm in diameter is in a magnetic field that drops from 0.14T to 0 T in 11ms. What is the emf of the coil
After the NEAR spacecraft passed Mathilde, on some occasion's rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid Eros, final destination for the mission.
Alice made a telephone call from her home telephone in New York to her fiance stationed in Baghdad, about 10,000km away, Estimate the time taken for signals sent by telephone cable
The exhaust temperature of a Carnot heat engine is 305°C. What is the intake temperature if the efficiency of the engine is 32%
An object is placed to the left of the converging lens, and the final image produced by the two-lens combination lies 21.2 cm to the left of the diverging lens. How far is the object from the converging lens
What minimum coefficient of kinetic friction is required to bring the crate to a stop over a distance of 5.0 m along the lower surface.
A subway train starts from rest at a station and accelerates at a rate of 1.56m/s2 for 13.7s, Find the total distance covered
A cylindrical capacitor has an inner conductor with a radius of 1.1mm and an outer conductor with a radius of 3.5mm. What is the capacitance per unit length
A rigid (constant volume) container holds 4.6 moles of an ideal gas initially at 190 K and 2.0 atm. How much gas is in the container at the final pressure and temperature
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