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klio [65]
3 years ago
11

Pelo nossa observaçao do cotidiano,podmos perceber facilmente que se uma pedra for largada do alto de um predio , ele ira se des

locar em direçao ao solo ,enquanto que a fumaça produzida pela queima da madeira sobe para os ceus. Como aristosteles explicava estes movimentos?
Physics
1 answer:
dsp733 years ago
3 0

Answer:

Esses movimentos são movimentos naturais.

Explicação:

Se uma pedra cair do topo de um telhado ou edifício, a pedra se moverá em direção à terra, enquanto a fumaça produzida devido à queima da madeira vai para cima, então de acordo com Aristosteles esses tipos de movimento são chamados de movimento natural porque de acordo à definição de movimento natural que não requer nenhuma força, então esses dois movimentos também se movem na direção para baixo e para cima sem usar qualquer força, então podemos dizer que esses movimentos são naturais.

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Calculate the average value of an AC signal with a peak amplitude of 10V and a frequency of 10 kHz.
Solnce55 [7]

Answer:

V(average)=6.37 V

Explanation:

Given Data

Peak Voltage=10V

Frequency=10 kHZ

To Find

Average Voltage

Solution

For this first we need to find Voltage peak to peak

So

Voltage (peak to peak)= 2× voltage peak

Voltage (peak to peak)= 2×10

Voltage (peak to peak)= 20 V

Now from Voltage (peak to peak) formula we can find the Average Voltage

So

Voltage (peak to peak)=π×V(average)

V(average)=Voltage (peak to peak)/π

V(average)=20/3.14

V(average)=6.37 V

3 0
3 years ago
Suppose that two sources of sound produce waves of the same exact amplitude and frequency, but are out of phase by one-half of a
tia_tia [17]

Answer:

option D is right

........

8 0
3 years ago
Read 2 more answers
A building is being knocked down with a wrecking ball, which is a big metal sphere that swings on a 15-m-long cable. You are (un
Charra [1.4K]

Answer:

1.9 s

Explanation:

We are given that

Length of cable=l=15 m

We have to find the time you have to move out of the way.

We know that

Time period,T=2\pi\sqrt{\frac{l}{g}}

Where g=9.8m/s^2

By using the formula

T=2\pi\sqrt{\frac{15}{9.8}}

T=2\times 3.14\times \sqrt{\frac{15}{9.8}}=7.77 s

Time you have to move out

t=\frac{T}{4}=\frac{7.77}{4}=1.9 s

Hence,time you have to move out of the way=7.77 s

6 0
4 years ago
A car and driver weighing 5060N passes a sign stating "Bridge out 27.5 meters ahead." She slams on the brakes and the car decele
OlgaM077 [116]

Answer:

<u>198785.714286 Joules</u>

Explanation:

W=f*d

F=ma\\F=516.326530612*-14\\F=-7228.57142857 N\\

<u>To find work:</u>

Now that the force and the distance are known, plug and chug:

W=f*d\\W=-7228.57142857*27.5\\W=-198785.714286J

Note that the question is asking for the magnitude of work, so the negative can be discarded as it is a directional component.

So, your answer is

<u>198785.714286 Joules</u>

6 0
3 years ago
A loop of wire is perpendicular to a magnetic field such that the field is coming straight at you through the loop. The field be
Umnica [9.8K]

Answer:

we will have induced magnetic field towards us

now in order to induce the magnetic field towards us we must have induced current in the loop and its direction is counterclockwise.

Explanation:

As per lenz law we know that the rate of change in magnetic flux linked with the closed loop will induced EMF in the loop and the direction of this induced current in the loop will always oppose the causes due to which it is induced

Here we know that magnetic field is straight towards us and it start decreasing with time

So we can say that flux linked with the coil will also decrease with time

Now as per lenz law the induced magnetic field of the loop is in such a direction that it will increase the magnetic flux in the coil.

So we will have induced magnetic field towards us

now in order to induce the magnetic field towards us we must have induced current in the loop and its direction is counterclockwise.

5 0
3 years ago
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