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asambeis [7]
3 years ago
7

Help me with this plzzz

Physics
2 answers:
Ksenya-84 [330]3 years ago
6 0
Assuming that there is no wind or air resistance, the acceleration due to gravity will remain the same. (9.81m/s^2) therefore B is out.

Potential energy is stored energy. Meaning, that when something is in motion, it will decrease and kinetic energy will increase.

A is correct
Marysya12 [62]3 years ago
4 0

Answer:

yeah I'm Pretty sure it's b

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Acceleration involves a change in speed and _______<br> (Fill in the blank space)
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Acceleration involves a change in speed and Direction
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Read 2 more answers
People benefit by participating in the market because
solniwko [45]

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Market participation allows individuals to specialize and, with trade, ultimately consume more.

3 0
3 years ago
Consider two metallic rods mounted on insulated supports. One is neutral, the other positively charged. You bring the two rods c
EastWind [94]

Answer:

I think it will be half of the initial charge

Explanation:

Because we know, the resulting charge will be q1+q2/2, since one is neutral so the charge will be half q/2

3 0
3 years ago
You are playing a violin, where the fundamental frequency of one of the strings is 440 Hz, as you are standing in front of the o
Natalka [10]

Answer:

a)   L = 440 cm

Explanation:

In the open tube on one side and cowbell on the other, we have a maximum in the open part and a node in the closed part, therefore the resonance frequencies are

             λ₁ = 4L             fundamental

             λ₃ = 4L / 3       third harmonic

             λ₅ = 4L / 5       five harmonic

             

The violin string is a fixed cure in its two extracts, so both are nodes, their length from resonance wave are

              λ₁ = 2L                    fundamental

             λ₂ = 2L / 2              second harmonic

             λ₃ = 2L / 3              third harmonic

             λ₄= 2L / 4               fourth harmonic

They indicate that resonance occurs in the fourth harmonic, let's look for the frequency

              v =λ f

for the fundamental

              v = λ₀ f₀

              V = 2L f₀

for the fourth harmonica

              v = λ₄  f ’

              v = L / 2  f'

             2L f₀ = L / 2 f ’

             f ’= 4 f₀

             f ’= 4 440

             f ’= 1760 Hz

for this frequency it has the resonance with the tube

           f ’= 4L

           L = f ’/ 4

           L = 1760/4

           L = 440 cm

b) let's find the frequency of the next harmonic in the tube

             λ₃ = 4L / 3

             λ₃ = 4 400/3

             λ₃ = 586.6 cm

            v = λf

            f = v / λlam₃

            f₃3 = 340 / 586.6

            f3 = 0.579

as the minimum frequency on the violin is 440 Beam there is no way to reach this value, therefore there are no higher resonances

6 0
3 years ago
What is the gravitational force between two 60.0 kg people sitting 100 m<br> apart?
Finger [1]

Answer:

2.4 × 10^(-11) N

Explanation:

F = Gm²/r²

F = 6.67×10^(-11) × 60² / 100²

= 2.4×10^(-11) N

7 0
3 years ago
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