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yarga [219]
3 years ago
5

Earth, the Sun, and billions of stars are contained within

Physics
2 answers:
Nitella [24]3 years ago
3 0
I think it is the Milky Way.
Kamila [148]3 years ago
3 0
In the Milky Way galaxy
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2. Connect concepts on the left with a description on the right.
Nuetrik [128]

plzzz explain me your questions

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2 years ago
Which factors affect absorption and reflection of thermal energy? Check all that apply.
V125BC [204]
A and C, The Color and Texture of the material. 
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3 years ago
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For anti-ballistic missile system, the time of flight tf is determined by the initial speed v0 of the missile and the maximum ra
umka2103 [35]
Refer to the diagram shown below.

The following discussion assumes a simplistic analysis that ignores air resistance and variations in the terrain that the missile travels over.

Let the launch velocity be V₀ at an angle of θ relative to the horizontal.
The horizontal component of velocity is V₀ cosθ.
If the time of flight is t_{f}, then
r=V_{o} \, t_{f}
where r = the range of the missile.

Also, the time, t, when the missile is at ground level is given by
0=V_{o} sin\theta \, t- \frac{1}{2}gt^{2}
where g = acceleration due to gravity.

t = 0 corresponds to when the missile is launched. Therefore
t_{f} =  \frac{2V_{o}sin\theta}{g}

Therefore
r= \frac{2V_{o}^{2} sin\theta cos\theta}{g} = \frac{V_{o}^{2} sin(2\theta)}{g}

Typically, θ=45° to achieve maximum range, so that
r= \frac{V_{o}^{2}}{g}

This analysis is more applicable to a scud missile rather than a powered, guided missile.

Answer:
t_{f} =  \frac{r}{V_{o} cos\theta} \\\\ r= \frac{V_{o}^{2} sin(2\theta)}{g}
Usually, θ=45°

6 0
3 years ago
Is an aquarium a system ?
sweet [91]

No

Explanation:Brooo it does not contribute to the eco system

6 0
2 years ago
Car A and Car B approach each other
vagabundo [1.1K]

The original frequency of horn of Car A is 1071 Hz.

Explanation:

Doppler effect describes the change in the frequency of sound waves with respect to the observer. As the sound waves emitted from a source need to travel the air medium to reach observer, it will undergo loss in energy. So there will be change in its frequency compared to original frequency. Depending upon the direction of travel of source and observer the shifting of frequency will vary.

f'=\frac{v-v_{o} }{v-v_{s} } f

Here vo is the observer velocity and vs is the velocity of the source. So Vo = 15 m/s as car B is the observer and Vs = 35 m/s as car A is the source. And f is the frequency of sound wave at source that is car A.

Similarly, the doppler shift in frequency is the frequency of sound heard by car B which is f' = 1140 Hz. And v is the speed of sound that is v = 343 m/s

1140 = \frac{343-15}{343-35}*f= 1.0649 *f

f = 1140/1.0649= 1071 Hz.

Thus, the original frequency of horn of Car A is 1071 Hz.

3 0
3 years ago
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