An atom is said to have been ________ when it absorbs a photon with sufficient energy to free an electron
Fill in the blank(s) with correct word
ionized
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In Jules Verne's From the Earth to the Moon, scientists are launched from the surface of Earth by a cannon
With what speed would their capsule have to leave the cannon if the speed of the capsule is required to be zero m/s at the point between Earth and the Moon where their gravitational pulls on the capsule are equal? The mass of Earth is 5.97 × 1024 kg, the mass of the Moon is 7.35 × 1022 kg, the distance between Earth and the Moon is 3.84 × 108 m, the radius of Earth is 6.37 × 106 m, and G = 6.67 x 10-11 N•m2/kg2. A) 11,100 m/s B) 11,200 m/s C) 10,400 m/s D) 15,700 m/s E) 15,800 m/s
A light source simultaneously emits light of two wavelengths, 460 nm and 654 nm, respectively. The source is used in a double-slit interference experiment where the slit spacing is a 0.0431 mm, and the distance between double slits and the screen is 0.90 m. What is the separation between the second-order bright fringes of the two wavelengths as they appear on the screen? (1 nm = 10?9 m)
a. 4.1E–3 m b. 2.1E–3 m c. 8.1E–3 m d. 6.9E–3 m e. 4.7E–2 m
In order to simulate weightlessness for astronauts in training, they are flown in a vertical circle. If the passengers are to experience weightlessness, how fast should an airplane be moving at the top of a vertical circle with a radius of 2.5 km?
A) 79 m/s B) 310 m/s C) 260 m/s D) 160 m/s E) 510 m/s
Complete and balance the equation: Mg + HC2H3O2 ? _____________________
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