A radiating body originally has a Kelvin temperature To, and its surroundings are at 500K (To > 500K). If the Kelvin temperature of the radiating body is increased to 3To,
the net rate at which the body radiates increases by a factor of 333. What was the original temperature To?
536 K
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If an electron is determined to be at x = 2.000 cm ± 0.0010 cm, what is the minimum uncertainty in the x component of its velocity? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
What will be an ideal response?
Which of the paths shown represent unbound orbits?
A) 1 only B) 2 only C) 3 only D) both 2 and 3 E) There is no such thing as an unbound orbit.
If the maximum possible accuracy in measuring the position of a particle increases, the maximum possible accuracy in measuring its velocity will
A) increase. B) decrease. C) not be affected.
A particle starts from rest at xi = 0 and moves for 10 s with an acceleration of +2.0 cm/s2 . For the next 20 s, the acceleration of the particle is ?1.0 cm/s2 . What is the position of the particle at the end of this motion?
a. zero b. +3.0 m c. ?1.0 m d. +2.0 m e. ?3.0 m