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Vikki [24]
3 years ago
7

A taxi starts from Monument Circle and travels 5 kilometers to the east for 5 minutes. Then it travels 10 kilometers to the sout

h for 10 minutes.
What is the taxi moving with reference to? (Monument Circle, The passengers, The taxi driver)
What changes? (average speed, average velocity)
What stays the same? (average speed, average velocity, direction)
Physics
2 answers:
Vadim26 [7]3 years ago
7 0

Answer:

Average Velocity changes

Average Speed Remains same

Explanation:

As we know that average speed is the ratio of total distance moved by the object in given interval of time

So initially we know that the distance moved by the car is 5 km in 5 min towards East

So we have average velocity

v = \frac{5}{5} = 1 km/min Towards East

Now in other case it moved 10 km in next 10 min

so its average velocity is given as

v = \frac{10}{10} = 1 km/min Towards South

Since direction of motion changes here so Average velocity is changing while average speed will remain the same

bezimeni [28]3 years ago
5 0
If youre looking for speed the equation would be distance/time

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One speaker generates sound waves with amplitude A.
raketka [301]

Answer:

iv) It is 9x bigger than before

Explanation:

As the amplitudes of the new speakers add directly with the original one, taking into account the phase that they have, the composed amplitude of the sound wave is as follows:

At = A + 4A -2A = 3 A

The intensity of the wave, assuming it propagates evenly in all directions, is constant at a given distance from the source, and can be expressed as follows:

I = P/A

where P= Power of the wave source, A= Area (for a point source, is equal to the surface area of a sphere of radius r, where is r is the distance to the source along a straight line)

For a sinusoidal wave, the power is proportional to the square of the amplitude, so the intensity is proportional to the square of the amplitude also.

If the amplitude changes increasing three times, the change in intensity will be proportional to the square of the change in amplitude, i.e., it will be 9 times bigger.

So, the statement iv) is the right one.

7 0
3 years ago
A circular parallel plate capacitor is constructed with a radius of 0.52 mm, a plate separation of 0.013 mm, and filled with an
olya-2409 [2.1K]

Answer:

289282

Explanation:

r = Radius of plate = 0.52 mm

d = Plate separation = 0.013 mm

A = Area = \pi r^2

V = Potential applied = 2 mV

k = Dielectric constant = 40

\epsilon_0 = Electric constant = 8.854\times 10^{-12}\ \text{F/m}

Capacitance is given by

C=\dfrac{k\epsilon_0A}{d}

Charge is given by

Q=CV\\\Rightarrow Q=\dfrac{k\epsilon_0AV}{d}\\\Rightarrow Q=\dfrac{40\times 8.854\times 10^{-12}\times\pi \times (0.52\times 10^{-3})^2\times 2\times 10^{-3}}{0.013\times 10^{-3}}\\\Rightarrow Q=4.6285\times 10^{-14}\ \text{C}

Number of electron is given by

n=\dfrac{Q}{e}\\\Rightarrow n=\dfrac{4.6285\times 10^{-14}}{1.6\times10^{-19}}\\\Rightarrow n=289281.25\ \text{electrons}

The number of charge carriers that will accumulate on this capacitor is approximately 289282.

6 0
2 years ago
The diagram shows the Earth rotating on it's axis. The two stars show different locations on the surface... How long does it tak
amid [387]
My guess would be about 10 years because stars are hot balls of light that are reflections from years ago so it would most likely take awhile
6 0
2 years ago
Read 2 more answers
Pls help will give brainlist
ale4655 [162]
Potential energy

potential energy is the stored energy an object has, the bike is not moving and it just sitting on the hill, with the stored energy
3 0
2 years ago
What is the speed of a wave frequency of 300hz and a wavelength of 25M
tia_tia [17]

Answer:

7500 m/s

Explanation:

We can use the equation velocity of a wave equals wavelength times  frequency.  Therefore, v = wavelength*f = (25 m)(300 Hz) =  m/s7,500

8 0
3 years ago
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