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3 years ago

Why is Pluto not considered a planet?

2 answers:

4 0

Pluto is considerd a dwarf planet because it was too small in size to be an acutal planet and its location in space. Pluto and planets like it are now called Dwarf planets. Pluto is also called a Plutoid, a plutoid is a dwarf planet that is farther out in space then the planet Neptune.

I hope that helped☺️

ASHA 777 [7]3 years ago

3 0

Pluto is actually considered to be a dwarf planet and was not considered a planet due to the fact that it was too small in size and it's location is space. Pluto and others similar to it are called dwarf planets. Pluto is also referred to as a plutoid, which is any dwarf planet farther out than the planet Neptune.

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What happens to the molecules in water as it freezes?

Keith_Richards [23]

The molecules give off heat.

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4 years ago

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ametal of mass 0.6kg is heated by an electric heater connected to 15v batter when the ammeter reading is 3A its tempeeature rise

Vedmedyk [2.9K]

Answer:

692 J/kg/°C

Explanation:

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3 years ago

What causes high and low tides?

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The gravitational effect of the moon causes both the high tide and low tides.

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4 years ago

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How much energy (in kj) do 3.0 moles of photons, all with a wavelength of 670 nm, contain? how much energy (in kj) do 3.0 moles

Kisachek [45]

1 mole of photons contain $6.023 \cdot 10^{23}$ photons (Avogadro number). This means that 3.0 moles of photons contain
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The wavelength of the light in the problem is $\lambda=670 nm=670\cdot 10^{-9}m$ , so the frequency is
$f= \frac{c}{\lambda}= \frac{3\cdot 10^8 m/s}{670 \cdot 10^{-9}m}=4.48 \cdot 10^{14}Hz$

The energy carried by a single photon is
$E=hf$
where $h=6.62 \cdot 10^{-34}Js$ is the Planck constant, while f is the frequency. Since this is the energy carried by a single photon, the energy carried by 3.0 moles of photons will be the energy of the single photon multiplied by the total number of photons:
$E=Nhf=(1.81 \cdot 10^{24})(6.62 \cdot 10^{-34}Js)(4.48 \cdot 10^{14}Hz )=5.36 \cdot 10^5 J$
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3 years ago

Which statement is true about vectors?

lora16 [44]

Vectors need direction and magnitude to exist, otherwise, it becomes scalars that do not require direction to be expressed.

eg - Velocity is a vector as it needs direction, but speed is scalar and does not need direction

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