All categories

3 years ago

If a tree fall in a forest does it make a sound?

Physics

1 answer:

Dmitry [639]3 years ago

8 0

it does make a sound but no one is there to hear it

You might be interested in

A 10-turn coil of wire having a diameter of 1.0 cm and a resistance of 0.50 Ω is in a 1.0 mT magnetic field, with the coil orien

n200080 [17]

Answer:

The voltage across the capacitor is 1.57 V.

Explanation:

Given that,

Number of turns = 10

Diameter = 1.0 cm

Resistance = 0.50 Ω

Capacitor = 1.0μ F

Magnetic field = 1.0 mT

We need to calculate the flux

Using formula of flux

$\phi=NBA$

Put the value into the formula

$\phi=10\times1.0\times10^{-3}\times\pi\times(0.5\times10^{-2})^2$

$\phi=7.85\times10^{-7}\ Tm^2$

We need to calculate the induced emf

Using formula of induced emf

$\epsilon=\dfrac{d\phi}{dt}$

Put the value into the formula

$\epsilon=\dfrac{7.85\times10^{-7}}{dt}$

Put the value of emf from ohm's law

$\epsilon =IR$

$IR=\dfrac{7.85\times10^{-7}}{dt}$

$Idt=\dfrac{7.85\times10^{-7}}{R}$

$Idt=\dfrac{7.85\times10^{-7}}{0.50}$

$Idt=0.00000157=1.57\times10^{-6}\ C$

We know that,

$Idt=dq$

$dq=1.57\times10^{-6}\ C$

We need to calculate the voltage across the capacitor

Using formula of charge

$dq=C dV$

$dV=\dfrac{dq}{C}$

Put the value into the formula

$dV=\dfrac{1.57\times10^{-6}}{1.0\times10^{-6}}$

$dV=1.57\ V$

Hence, The voltage across the capacitor is 1.57 V.

5 0

3 years ago

Canned vegetables are usually more expensive than fresh vegetables true or false

aalyn [17]

Answer:

Explanation:

true because i depends (what market you go to) and how much the vegetable weighs

5 0

2 years ago

Two friends are having a conversation. Anna says a satellite in orbit is in freefall because the satellite keeps falling toward

Leno4ka [110]

Answer:

Anna is correct.

Explanation:

Anna is right as a satellite is in free fall because it keeps falling toward Earth, meaning that gravity is the only force acting on it. Tom is incorrect because an object does not have to accelerate at a certain speed to be considered to be in free fall. As long as gravity is the only force acting upon the object, it is considered to be in free fall.

4 0

3 years ago

Photosynthesis transforms molecules of water and carbon dioxide into Molecules of?

brilliants [131]

Into molecules of sugar and oxygen.
The complete reaction of the photosynthesis is in fact:
$6CO_2+6H_2O \rightarrow C_6H_{12}O_6+6O_2$
and the energy of the light coming from the sun is also used to make the reaction possible.

7 0

3 years ago

The speed of light is now defined to be c-2.99792458 x 10^8 m/s

Harman [31]

Yes, that statement is loaded with veracity, and is true as well. Did you have a question to ask ?

8 0

2 years ago

Read 2 more answers