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Masteriza [31]
3 years ago
7

Microwave ovens emit microwave energy with a wavelength of 12.1 cm. What is the energy of exactly one photon of this microwave r

adiation?
Physics
1 answer:
EastWind [94]3 years ago
3 0

Answer:

1.64\cdot 10^{-24}J

Explanation:

The energy of a photon is given by:

E=\frac{hc}{\lambda}

where

h=6.63\cdot 10^{-34} Js is the Planck constant

c=3\cdot 10^8 m/s is the speed of light

\lambda is the wavelenght of the photon

For the microwave photons in this problem,

\lambda=12.1 cm=0.121 m

so their energy is

E=\frac{(6.63\cdot 10^{-34}Js)(3\cdot 10^8 m/s)}{0.121 m}=1.64\cdot 10^{-24}J

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An 8.5 kg crate is pulled 5.1 m up a 30 degree incline by a rope angled 17 degrees above the incline. The tension in the rope is
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1. a W_t=746.63 J

  b E_p=212.415 J

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Explanation:

a). The work done by the tension is:

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W_t=746.63 J

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W_n=8.5kg*9.8*cos(30)*2.55

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2. The increase in thermal energy is:

T_e=F*d

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3 years ago
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A 1-kg mass at the earth's surface weighs about C. 10N

The third planet from the Sun is the Earth. It is the seventh largest in terms of size and weighs roughly 5.98 1024 kg. The inherent quality of mass is unaffected by the environment of the object or the technique employed to quantify it.

Newton's law of gravitation can be used to estimate the mass of the Earth. This is set to the fundamental formula, which reads: force (F) = mass (m) times acceleration. Gravitational acceleration (G) is equal to 9.8 m/s2, the Earth's radius is 6.37 106 m, and the gravitational constant (G) is 6.673 1011 Nm2/kg2. The Earth has a mass of 5.96 1024 kg after rearranging the equation and entering all the numbers.

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