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4 years ago

Plz help me out with this

Physics

1 answer:

Natalija [7]4 years ago

8 0

B. Copernicus described the orbits of the planet's as circular.

Explanation:

He claimed that the sun was the center of the solar system.The believe was that earth was at the center of the universe.The idea was that planets moved in perfect circles rather than ellipse.The planets orbited the sun instead of the earth.This illustration was called heliocentric.

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Copernicus model: brainly.com/question/11523103

Keywords : Copernicus ,model

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Displacement vectors of 4 km north, 2km south, 5 km north, and 5km south combine to a total displacement of A 2 km south B 16 km

prohojiy [21]

I would prolly say C. 16 km south.

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3 years ago

Read 2 more answers

Directions Part 2: Using what you learned about the formation of the Grand Canyon and which layer is oldest, try to answer the f

kykrilka [37]

Answer: Neighbour

Explanation: Taken perspective from the given clues:

The Neighbor walks to work

The Handyman rides a bike

The Cook rides a motorcycle

The Maid drives a car

The Nephew has a dog

If we assume that the handyman delivered the iPad in the mailbox, then

The direction of the cook, Nephew and his dog are perpendicular to the direction of the bike of the handyman. So, it can't be the cook, Nephew and the maid.

The two suspects are the handyman and the neighbour.

If the handyman actually dropped the iPad and left, then, the neighbour should be the culprit.

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4 years ago

The siren on an ambulance is emitting a sound whose frequency is2550 Hz. The speed of sound is 343 m/s.(a) If the ambulance is s

Sati [7]

Answer:

0.13451 m

0.124196 m

0.119997901132 m

Explanation:

$v_o$ = Velocity of the observer

$v_s$ = Velocity of sound source

v = Velocity of sound in air = 343 m/s

Wavelength is given by

$\lambda=\dfrac{v}{f}\\\Rightarrow \lambda=\dfrac{343}{2550}\\\Rightarrow \lambda=0.13451\ m$

The wavelength is 0.13451 m

From Doppler effect we have the formula

$f=f'\dfrac{v}{v-v_s}\\\Rightarrow f=2550\dfrac{343}{343-26.3}\\\Rightarrow f=2761.7619198\ Hz$

$\lambda=\dfrac{343}{2761.7619198}\\\Rightarrow \lambda=0.124196\ m$

The wavelength is 0.124196 m

$f=f'\dfrac{v+v_o}{v-v_s}\\\Rightarrow f=2550\dfrac{343+12}{343-26.3}\\\Rightarrow f=2858.38332807\ Hz$

$\lambda=\dfrac{343}{2858.38332807}\\\Rightarrow \lambda=0.119997901132\ m$

The wavelength is 0.119997901132 m

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4 years ago

Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 12.0 m/s toward the east and the

Daniel [21]

Answer: 25.7m/s

Explanation: the cars have equal masses so we only consider their velocities,

The cars traveled together at 65° north of east this is with a velocity equal to the resultant velocity,

Using the force diagram as shown below;

Tan 65° = Vn/Ve

Ve is velocity of the car traveling east

Vn is velocity of car traveling north

Tan 65° = V2/12

2.144 = V2/12

V2 = 12 * 2.144

V2 = 25.7 m/s

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3 years ago

Consider a car that travels between points A and B. The car's average speed can be greater than the magnitude of its average vel

ryzh [129]

Answer: A.True

Explanation: simply put the magnitude of the speed is a function of Distance while the magnitude of velocity is a function of Displacement. Displacement is the average Distance moved in different directions which will be smaller in magnitude compared to the Total Distance used the calculating the magnitude of speed.

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4 years ago