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rosijanka [135]
3 years ago
13

Answer this question

Physics
1 answer:
ArbitrLikvidat [17]3 years ago
3 0

Answer:

i) 2

ii) No

Explanation:

i) The man will hear two sounds: one through the rail, and one in the air.

ii) The sounds will not reach the man at the same time.  Sound travels faster through solids than through gases, so he will hear the sound through the rail before he hears the sound in the air.

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A satellite dish is in the shape of a parabolic surface. Signals coming from a satellite strike the surface of the dish and are
RSB [31]

Answer: 6.125 ft

Explanation:

If this dish has the form of a concave upward parabola and its vertex p is at the origin, its corresponding equation is:

x^{2}=4py

Where:

x is the radius, which can be found by dividing the diameter d=14 ft by half. Hence x=\frac{d}{2}=\frac{14 ft}{2}=7 ft

y=2 ft is the depth

p is the vertex of the parabola, where its base is

Finding p:

p=\frac{x^{2}}{4y}

p=\frac{(7 ft)^{2}}{4(2 ft)}

Finally:

p=6.125 ft This is where the the receiver should be placed

3 0
3 years ago
What is the current through a wire if 240 coulombs of charge pass through the wire in 2.0 minutes?
xenn [34]
Current = charge/time = 240/2x120 =1A.
Current flowing is 1 ampere. 
4 0
3 years ago
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Match the type of boundary with its characteristic.
olga_2 [115]

At Divergent boundary, Crust is created.

At Convergent boundary, Crust is destroyed.

At Transform boundary, Crust is neither created nor destroyed.

<h3>What occurs at Divergent, Convergent and Transform boundary?</h3>

A divergent boundary occurs when two tectonic plates move away from each other. At this boundary, new oceanic crust is created.

Convergent boundaries are those boundaries where two plates are pushing into each other. These boundaries are pushing one of the plates under the other and back into the mantle to melt.

Transform boundaries are places where plates slide sideways past each other. At this boundary, Crust is neither created nor destroyed.

Learn more about boundary here: brainly.com/question/14298823

#SPJ1

7 0
2 years ago
The atomic number of beryllium (Be) is 4, and the atomic number of barium (Ba) is 56. Which comparison is best supported by this
Vesnalui [34]
The atomic number of beryllium (Be) is 4, and the atomic number of barium (Ba) is 56. the <span>comparison is best supported by this information is that beryllium has a lower atomic radius than Barium</span>
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Oliga [24]

Answer:

because when squeezing you are increasing pressure within the bottle and there is less pressure on the outside

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