The ground-state energy of an electron in a hydrogen atom is ?13.6 eV. This means that the binding energy of that electron is
A. ?13.6 eV.
B. +13.6 eV.
C. Some other value (specify).
B. +13.6 eV.
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A 6.0-?F air-filled capacitor is connected across a 100-V potential source (a battery). After the battery fully charges the capacitor, it is left connected and the capacitor is immersed in transformer oil, which has a dielectric constant of 4.5
How much additional charge flows from the battery onto the capacitor during this process? A) 1.2 mC B) 2.1 mC C) 2.5 mC D) 1.7 mC
A 550- N person empties her lungs as much as possible and is then completely immersed in water of density 1000 kg/m3 while suspended from a harness connected to a spring scale. The spring scale reads now 21.2 N. What is her density?
A) 1050 kg/m3 B) 1040 kg/m3 C) 1030 kg/m3 D) 960 kg/m3 E) 56.1 kg/m3
Web designers increasingly rely on JavaScript, HTML5, and CSS3 standards to create browser- and device-independent animations.
Answer the following statement true (T) or false (F)
The focal length of the lens of a simple film camera is 40.0 mm. By what amount should the distance between the lens and the film be increased or decreased to change the focus from a person
who is 25 m from the lens to one who is 4.0 m from the lens? A) 0.2 mm B) 0.3 mm C) 0.4 mm D) 0.5 mm E) 0.7 mm