Calculate the frequency in hertz of photons of light with energy of 8.10 × 10^-19 J
a. 0.82 × 10^14 Hz
b. 0.82 × 10^15 Hz
c. 1.22 × 10^15 Hz
d. 1.22 × 10^14 Hz
c
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Spectral lines are produced when an electron makes a transition from one energy state to another
Indicate whether the statement is true or false
When you look at yourself in a pocket mirror, and then hold the mirror farther away, you see
A) more of yourself. B) less of yourself. C) the same amount of yourself.
Identical point charges (+20 ?C) are placed at the corners of an equilateral triangle with sides of 2.0-m length. How much external energy is required to bring a charge of 45 ?C from infinity to the midpoint of one side of the triangle?
a. 26 J b. 16 J c. 23 J d. 21 J e. 12 J
A 50 m long by 5 m diameter rocket at launch is moving upward at 180 km/h when its sides are at -45ºC and the surrounding air is 25ºC. Estimate the heat transfer from the surrounding air.
What will be an ideal response?