A proton (+1.6 × 10^-19 C) moves 10 cm along the direction of an electric field of strength 4.0 N/C. The electrical potential difference between the proton's initial and ending points is:
a. 4.8 × 10^-19 V.
c. 0.044 V.
b. 0.40 V.
d. 6.4 × 10^-19 V.
B
Physics & Space Science
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Ideal Gas Law: An ideal gas has a pressure of 2.5 atm, a volume of 1.0 L at a temperature of 30°C. How many molecules are there in this gas? (R = 8.31 J/mol ? K,1.00 atm = 101 kPa, NA = 6.022 × 1023)
A. 6.1 × 1023 B. 6.0 × 1022 C. 2.4 × 1022 D. 2.3 × 1023
Physics & Space Science
When oxygen and hydrogen gases combine, the result is
A) water. B) methane. C) a noble gas.
Physics & Space Science
There are 10 mm in a(n) ______________
Fill in the blank(s) with correct word
Physics & Space Science
The energy of a photon of wavelength 400 nm is _____________.
a. 
b. 
c. 
d. 
e. 
Physics & Space Science