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mars1129 [50]
3 years ago
7

A car starts moving from the position of rest with uniform acceleration of 8m/s^calculate the distance travelled by it during 10

th minute of its motion.
Physics
1 answer:
ad-work [718]3 years ago
8 0

We calculate the coordinates at t₁ = 9 min and t₂ = 10 min, since the 10th minute is between t₁ and t₂.

As it leaves from rest, it means that the initial speed is zero


t₁=9 min=540 s

t₂=10 min=600 s

x₁=at₁²/2=8*540²/2=4*291600=1166400 m

x₂=at₂²/2=8*600²/2=4*360000=1440000 m

Δx=x₂-x₁=1440000-1166400=273600 m represents the distance traveled by the car in the 10th minute of travel




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Aluminium has a work function of 4. 08 eV. The cutoff wavelength and cutoff frequency for the photoelectric effect is 303.9nm and 911.7× 10¹⁷ s⁻¹ respectively.

Work Function is the minimum energy required to eject an electron from a photoelectric material.

Cutoff Wavelength is the maximum wavelength below which electron will be ejected

Cutoff Frequency is the minimum frequency required to eject electron.

Let the work function of Aluminium be Φ

Given,  work function Φ = 4.08eV

We know that hc/λ =  Φ

where, h is Planck constant

c is speed of light

λ is wavelength of light used

Hence, on subsitution

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⇒ λ = 303.9 nm

Hence, cutoff wavelength used is 303.9 nm

We know that ν = c/λ

ν = 3 × 10⁸ / 303.9

⇒ ν = 911.7 × 10¹⁷ s⁻¹

Hence, cutoff frequency used is 911.7 × 10¹⁷ s⁻¹

Learn more about Work function here, brainly.com/question/24180170

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3 0
2 years ago
If you mix water that is 80° with the same amount of water that is 20° what will the resulting temperature be
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50

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Which of the following lists contains only examples of renewable sources of energy?
anyanavicka [17]
<h3><u>Answer;</u></h3>

A. wind, tidal, geothermal, and hydroelectric

<h3><u>Explanation</u>;</h3>
  • Renewable energy sources are the energy sources that are constantly being replenished, such as sunlight, wind, and water. This means that we can use them as much as we want, and we do not have to worry about them running out.
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5 0
3 years ago
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