The basic function of a carburetor of an automobile is to atomize the gasoline and mix it with air to promote rapid combustion. As an example, assume that 30 cm3 of gasoline is atomized into N spherical droplets, each with a radius of 2.0 × 10^?5 m. What is the total surface area of these N spherical droplets?
45000 cm2
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During a lecture demonstration, a professor places two coins on the edge of a table. She then flicks one of the coins horizontally off the table, simultaneously nudging the other over the edge. Describe the subsequent motion of the two coins, in particular discussing whether they hit the floor at the same time
A. Both coins will hit the ground at the same time because the vertical component of the velocity is exactly the same for both coins. However, the horizontal component of the velocity are the same for the 2 coins, and so, the both coins will hit the ground at the same distance from the table. B. Both coins will hit the ground at the same time because the vertical component of the velocity is exactly the same for both coins. However, the horizontal component of the velocity are different for the 2 coins, and so, the first coin will hit the ground at a farther away distance from the table. C. Both coins will hit the ground at the same time because the horizontal component of the velocity is exactly the same for both coins. However, the vertical component of the velocity are different for the 2 coins, and so, the first coin will hit the ground at the same place as the second coin. D. The two coins will fall at the same rate. The nudged one will fall straight down, whereas the flung one will fall in a half parabola. Both coins though will land at the same time, because when they land is determined by their initial vertical velocity, and both coins had an initial vertical velocity of 0 m/s.
The ability of a steel to be hardened to a specific depth is the _________.
Fill in the blank(s) with the appropriate word(s).
For photovoltaic cells, the potential difference for two silicon cells in series will at most be ________
a. 0.1 b. 0.5 c. 1.0 d. 2.0 e. 5.0 volts.
The two spacecraft constantly observing the Sun are ________ and ________
Fill in the blank(s) with correct word