Energy is released during a nuclear reaction due to a conversion between mass and energy. Mass is not conserved. The initial and final amounts are different. If a total of 1.0 gram of mass is "missing", how much energy has been released?
a. 9.0 × 10^11 J
b. 9.0 × 10^17 J
c. 9.0 × 10^15 J
d. 9.0 × 10^13 J
e. 9.0 × 10^16 J
d
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In making a transition from state n = 1 to state n = 2, the hydrogen atom must
A) absorb a photon of energy 10.2 eV. B) emit a photon of energy 10.2 eV. C) absorb a photon of energy 13.58 eV. D) emit a photon of energy 13.58 eV.
A charge of 40 pC is distributed on an isolated spherical conductor that has a 4.0-cm radius. Point A is 1.0 cm from the center of the conductor and point B is 5.0 cm from the center of the conductor. Determine the electric potential difference VA - VB
a. +1.8 V b. +29 V c. +27 V d. +7.2 V e. +9.0 V
A glucose transporter changes shape when it binds to a molecule of glucose. The shape change moves glucose down its concentration gradient to the opposite side of the membrane, where it detaches from the transport protein. What does this illustrate?
a. facilitated diffusion b. passive diffusion c. active transport d. energy fueled pump e. open channel transport
The Huygens probe took numerous pictures as it descended to the surface of Saturn's moon Titan in 2005. What did the pictures show?
A) features or erosion, including what appeared to be dry river valleys and lakebeds B) primitive life forms C) a densely cratered surface D) lava flows of molten basalt