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irinina [24]
3 years ago
5

A power source supplies an electric potential difference of 9.0 V to the plates of a capacitor. The energy stored in the capacit

or is 9.8 × 10–4 J. The dielectric constant of the dielectric in the capacitor is 5.1.
The ratio of the area of the plates to the distance between the plates, rounded to two significant figures, is
____ × 10^5 m.

Quizlet says 5.4 as the answer. Not sure if that's right.
Physics
1 answer:
Anarel [89]3 years ago
6 0

Answer:

5.4

Explanation:

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If the work function of a material is such that red light of wavelength 700 nm just barely initiates the photoelectric effect, w
marishachu [46]

Answer:

2.13 x 10^-19 J or 0.53 eV

Explanation:

cut off wavelength, λo = 700 nm = 700 x 10^-9 m

λ = 400 nm = 400 x 10^-9 m

Use the energy equation

E = \frac{h c}{\lambda _{o}}+K

Where, K be the work function

\frac{h c}{\lambda} = \frac{h c}{\lambda _{o}}+K

K =hc\left ( \frac{1}{\lambda } -\frac{1}{\lambda _{0}}\right )

K =6.63\times 10^{-34}\times 3\times 10^{8}\left ( \frac{1}{4\times 10^{-7} } -\frac{1}{7\times 10^{-7}}\right )

K = 2.13 x 10^-19 J

K = 0.53 eV

3 0
3 years ago
Predict the gravitational force between two 15-kg balls whose centers are 35 m apart.
ArbitrLikvidat [17]

F=G\frac{m_1-m_2}{r^2}

=\frac{(6.67\times10^{-11}N*m/kg^2)(15kg) }{(0.35m)^2}

=1.2\times10^{-7} N

Because the weight of one ball is mg = 147 N, the gravitational force between the two balls is 1.2\times10^{-7}N or 8.4*10^3 parts per billion of the  weight.

5 0
2 years ago
Explain how and why water travels through the four Earth systems as it moves through the water cycle
Nostrana [21]
Water in the Earth system is influencing all aspects of life on Earth. ... The returning water falls directly back into the oceans, or onto land as snow or rain. It soaks into the soil to move into the groundwater or runs off the Earth's surface in streams, rivers and lakes, which drain back into the oceans.
6 0
3 years ago
Mercury is commonly used in thermometer give reasons​
evablogger [386]

Answer:

hi

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Explanation:

pls mark as a BRAINLIST

6 0
3 years ago
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