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3 years ago

Examples such as the innovation between the Wright Brothers and the Boeing 747 led to the ___. *

Physics

1 answer:

Sladkaya [172]3 years ago

7 0

Answer:

Examples such as the innovation between the Wright Brothers and the Boeing 747 led to the progress of materials since industrial revolution.

Explanation:

Wright brothers made the first successful flight in history of a self-propelled, heavier than aircraft, and Boeing 747 is first ever wide body airplane produced.

However, these innovations; Wright Brothers and the Boeing 747 are big competitors in the market, as they try to improve their product. They have created unprecedented material progress since the industrial revolution.

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Which of the following is a compound?<br><br> (A) Brass<br> (B) Rust<br> (C) Iron<br> (D) Steel

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Rust is a compound of iron and oxygen.

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4 years ago

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A ballast is dropped from a stationary hot-air balloon that is at an altitude of 576 ft. Find (a) an expression for the altitude

Nadya [2.5K]

Answer:

Explanation:

If a ball dropped from a stationary hot-air balloon that is at an altitude of 576 ft, an expression for the altitude of the ballast after t seconds can be expressed using the equation of motion;

$S = ut + \frac{1}{2}at^{2}$

S is the altitude of the ballest

u is the initial velocity

a is the acceleration of the body

t is the time taken to strike the ground

Since the body is dropped from a stationary air balloon, the initial velocity u will be zero i.e u = 0m/s

Also, since the ballast is dropped from a stationary hot-air balloon, the body is under the influence of gravity, the acceleration will become acceleration due to gravity i.e a = +g

Substituting this values into the equation of the motion;

$S = 0 + \frac{1}{2}gt^2\\ S = \frac{1}{2}gt^2\\$

a) An expression for the altitude of the ballast after t seconds is therefore

$S = \frac{1}{2}gt^2\\$

b) Given S = 576ft and g = 32ft/s², substituting this into the formula in (a);

$576 = \frac{1}{2}(32)t^2\\\\\\576*2 = 32t^2\\1152 = 32t^2\\t^2 = \frac{1152}{32} \\t^2 = 36\\t = \sqrt{36}\\ t = 6.0secs$

This means that the ballast strikes the ground after 6secs

c) To get the velocity when it strikes the ground, we will use the equation of motion v = u + gt.

v = 0 + 32(6)

v = 192ft

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4 years ago

Which of the following is accurate in describing converging and diverging lenses?

kenny6666 [7]

B. Both of these types of lenses have the ability to produce real images.

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3 years ago

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Two objects are dropped from rest from the same height. Object A falls through a distance <img src="https://tex.z-dn.net/?f=d_A"

Alenkinab [10]

Answer:

The answer to your question is given below

Explanation:

Since both object A and B were dropped from the same height and the air resistance is negligible, both object A and B will get to the ground at the same time.

From the question, we were told that object A falls through a distance to dA at time t and object B falls through a distance of dB at time 2t.

Remember, both objects must get to the ground at the same time..!

Let the time taken for both objects to get to the ground be t.

Time A = Time B = t

But B falls through time 2t

Therefore,

Time A = Time B = 2t

Height = 1/2gt^2

For A:

Time = 2t

dA = 1/2 x g x (2t)^2

dA = 1/2g x 4t^2

For B

Time = t

dB = 1/2 x g x t^2

Equating dA and dB

dA = dB

1/2g x 4t^2 = 1/2 x g x t^2

Cancel out 1/2, g and t^2

4 = 1

4dA = dB

Divide both side by 4

dA = 1/4 dB

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3 years ago

If you increase the force on a box, it will have...

slavikrds [6]

Greater or more acceleration

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3 years ago

Examples such as the innovation between the Wright Brothers and the Boeing 747 led to the ______________ _________________. *

Examples such as the innovation between the Wright Brothers and the Boeing 747 led to the ___. *