What is the energy of the first rotational state of the hydrogen (H2) molecule? The separation between the protons is 10?10 m and the mass of each proton is 1.67 × 10^?27 kg. (h = 6.626 × 10^?34 J ? s and 1 eV = 1.6 × 10^?19 J.)
0.008 eV
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Which fundamental quantity does the average person measure most often every day?
a. Mass b. Length c. Time d. Electric charge
An LRC circuit has R = 15.0 ?, L = 25.0 mH, and C = 30.0 ?F. The circuit is connected to a 120 V (rms) source with frequency 200 Hz
(a) What is the impedance of the circuit? (b) What is the rms current in the circuit? (c) What is the rms voltage across the resistor? (d) What is the rms voltage across the inductor? (e) What is the rms voltage across the capacitor? (f) If the current in the circuit is given by I = I0 sin ?t, the voltage is given by
Conversion of Units: Hydraulicists often express rainfall in acre-feet. This is the amount of water required to cover an area of one acre to a depth of one foot. There are 640.0 acres in a square mile, and 5280 feet in one mile. How many cubic feet are there in one acre-foot?
Fill in the blank(s) with the appropriate word(s).
When you scuff electrons from a carpet onto your shoes, you become
A) negatively charged. B) positively charged. C) polarized. D) ionized. E) neutralized.