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4 years ago

15. Meteoroids can form when comets break apart, creating dust clouds.

Physics

1 answer:

Liula [17]4 years ago

7 0

Answer (s):

15. True

16. False

17. True

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A stationary horn emits a sound with a frequency of 228 Hz. A car is moving toward the horn on a straight road with constant spe

stiks02 [169]

Answer: 26.84 m/s

Explanation:

Given

Original frequency of the horn $f_o=228\ Hz$

Apparent frequency $f'=246\ Hz$

Speed of sound is $V=340\ m/s$

Doppler frequency is

$\Rightarrow f'=f_o\left(\dfrac{v+v_o}{v-v_s}\right)$

Where,

$v_o=\text{Velocity of the observer}\\v_s=\text{Velocity of the source}$

Insert values

$\Rightarrow 246=228\left[\dfrac{340+v_o}{340-0}\right]\\\\\Rightarrow 366.84=340+v_o\\\Rightarrow v_o=26.8\ m/s$

Thus, the speed of the car is $26.84\ m/s$

4 0

3 years ago

Which one is NOT an application of heating effect of electric current ? * Required to answer. Single choice.(1 Point) Electric b

solmaris [256]

Answer:

Electromagnet.

Explanation:

Electric bulb and electric water heather are application of heating effect of electric current. The electromagnet is not the result of heating effect of electric current. The bulb gives light due to the heating effect similarly the water is heated or warmed by the heating effect of electric current.

5 0

3 years ago

The application of solid-state physics that is the study of the arrangement of atoms in a solid is

balandron [24]

Answer:

crystallography.......

8 0

3 years ago

The position x of a particle moving along x axis varies with time t as x = Asin(wt) , where A and w are constants . The accelera

Elodia [21]

Let's see

$\\ \rm\Rrightarrow x=Asin(\omega t)\dots(1)$

Now we know the formula of acceleration

$\\ \rm\Rrightarrow \alpha=-A\omega^2sin(\omega t)$

$\\ \rm\Rrightarrow \alpha=-Asin(\omega t)\times \omega^2$

From eq(1)

$\\ \rm\Rrightarrow \alpha=-x\omega^2$

$\\ \rm\Rrightarrow \alpha=-\omega^2x$

6 0

2 years ago

Read 2 more answers

What kind of gas cloud is most likely to give birth to stars? what kind of gas cloud is most likely to give birth to stars? a co

navik [9.2K]

Hello!

The kind of gas cloud that is most likely to give birth to stars is a cold, dense gas cloud.

Stars are formed in giant molecular clouds, called "star nurseries". These are regions with molecular Hydrogen, Helium, and little amounts of other elements. These are cold and dense regions, and the gas cloud collapses, forming a protostar. The protostar gradually heats, powering nuclear reactions in its center, which increases the temperature even more and giving birth to a star.

Have a nice day!

7 0

3 years ago