Open Question
(a) A forward-bias voltage of 15.0 mV produces a positive current of 9.25 mA through a p-n junction at 300 K. What does the positive current become if the forward-bias voltage is reduced to 10.0 mV?
1. Intro to Physics Units
Introduction to Units
Back1. Intro to Physics Units
Introduction to Units
- Open QuestionCalculate the minimum beam energy in a proton-proton collider to initiate the p + p → p + p + η^0 reaction. The rest energy of the h^0 is 547.3 MeV (see Table 44.3).
- Open QuestionA particle has rest mass 6.64 * 10-27 kg and momentum 2.10 * 10-18 kg•m/s. (a) What is the total energy (kinetic plus rest energy) of the particle? (b) What is the kinetic energy of the particle? (c) What is the ratio of the kinetic energy to the rest energy of the particle?
- Open QuestionThe atomic mass of 14C is 14.003242 u. Show that the b- decay of 14C is energetically possible, and calculate the energy released in the decay.
- Multiple Choice
The earth's circumference is approximately 40.1 Mm (megameters). What is this circumference in kilometers?
1views - Multiple Choice
Astronomers often detect radio waves with wavelengths of 3,000,000,000 nm. What is this wavelength expressed in decameters (dam)?
1views - Multiple Choice
Rewrite 0.00016 kg in scientific notation.
1views - Multiple Choice
Rewrite 299,800,000 m/s in scientific notation.
1views - Multiple Choice
Rewrite 3.41 × 10−4 in standard form:
1views - Multiple Choice
Rewrite 9.98 × 107 in standard form.
1views - Multiple ChoiceWhich of the following quantities is an acceleration?1views
- Open Question
The position of an object is given by 𝓍 = At + Bt², where 𝓍 is in meters and t is in seconds.
(a) What are the units of A and B?
1views - Open Question
Write the following numbers in powers of 10 notation:
(e) 0.219
1views - Open Question
Write out the following numbers in full with the correct number of zeros:
(c) 2.5 x 10⁻¹
1views - Open Question(b) Is this particle curving upward, curving downward, or moving in a straight line?1views