A proton (mass = 1.67 × 10^?27 kg, charge = 1.60 × 10^?19 C) moves from point A to point B under the influence of an electrostatic force only. At point A the proton moves with a speed of 50 km/s. At point B the speed of the proton is 80 km/s. Determine the potential difference VB ? VA
a. +20 V
b. ?20 V
c. ?27 V
d. +27 V
e. ?40 V
b
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If an aluminum alloy’s numerical designation is followed by “H18”, it is strainhardened to _________hardness.
Fill in the blank(s) with the appropriate word(s).
Titan's surface has been mapped using Earth based visual telescopes
Indicate whether the statement is true or false
A herd of sheep eats 10 bales of hay every 4 days. If a bale of hay costs $2.85, how much will it cost to feed the sheep hay for one year?
a. $912.50 b. $2,600.63 c. $28.50 d. $3,650.00
An LRC series circuit has R = 15.0 ?, L = 25.0 mH, and C = 30.0 ?F. The circuit is connected to a 120-V (rms) ac 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?