The gap between electrodes in a spark plug is 0.06 cm. In order to produce an electric spark in a gasoline-air mixture, the electric field must reach a value of 3 × 106 V/m. What minimum voltage must be supplied by the ignition circuit when starting the car?
What will be an ideal response?
1800 V
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In contrast to the photosphere's continuum, the spectrum of the chromosphere is dominated by ________ lines
Fill in the blank(s) with correct word
A billiard ball collides in an elastic head-on collision with a second stationary identical ball. After the collision which of the following conditions applies to the first ball?
a. maintains the same velocity as before b. has one half its initial velocity c. comes to rest d. moves in the opposite direction
A 3.0-? resistor is connected in parallel with a 6.0-? resistor. This combination is then connected in series with a 4.0-? resistor
The resistors are connected across an ideal 12-volt battery. How much power is dissipated in the 3.0-? resistor? A) 6.0 W B) 2.7 W C) 5.3 W D) 12 W
The sky is blue because of
a. interference b. diffraction c. scattering d. dispersion e. polarization