1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
stepladder [879]
3 years ago
8

Col. Joe Kittinger of the United States Air Force crossed the Atlantic Ocean in nearly 86 hours. The distance he traveled was 57

000 m. Suppose Col. Kittinger is moving with a constant acceleration during most of his flight and that his final speed is 10.0 percent greater than his initial speed. Find the initial speed based on this data.
Physics
1 answer:
Savatey [412]3 years ago
7 0

Answer:

Initial speed Vo=631.229 mi/h

Explanation:

For this problem, I used miles instead of meters, because that seems more accurate. Since the final speed is 10% (0.1) higher than initial, then mathematically it means

V_{f}=V_{o}+0.1*V_{o}=1.1*V_{o}

First, find the acceleration,  with this formula

<em>V^{2} _{f}-V^{2}_{o}=2*a*dist</em>

<em>Which results in</em>

a=\frac{(1.1*V _{o})^{2}-V^{2}_{o}}{2*57000} =0.000002*V_{o}^{2}

Now substitute in this equation:

V _{f}-V_{o}=a*t\\ (1.1-1)*V_{o}=0.000002*V_{o}^{2}*86

This became in a quadratic equation. Dividing both sides by initial speed and solving and, since we used time in Hours and for distance miles, then the speed should have units of miles per hour:

0.1*V_{o}=0.000158*V_{o}x^{2} \\ V_{o}=631.229mi/h

You might be interested in
What is the wavelength of a radio photon from an "am" radio station that broadcasts at 1120 kilohertz?
Alex73 [517]

The wavelength of the radio photon  is 268 m.

Electromagnetic waves travel with the speed of 3×10⁸m/s in vacuum. The speed of a wave <em>c i</em>s related to its frequency<em> f</em> and wavelengthλ as follows:

c=f\lambda

Thus the wavelength is given by,

\lambda =\frac{c}{f}

Substitute 3×10⁸m/s for <em>c</em> and 1120×10³Hz for <em>f</em>.

\lambda =\frac{c}{f}\\ =\frac{3*10^8m/s}{1120*10^3Hz} \\ =267.8 m\\ =268 m

Thus the wavelength of the radio photon from an AM station is 268 m

6 0
3 years ago
To find amplitude, measure
polet [3.4K]
<span>from a trough to the rest position and from a crest to the rest position.

</span>
3 0
3 years ago
Read 2 more answers
PHYSICS PLEASE HELP!
Salsk061 [2.6K]

Answer:

It would take two half-lives which would be 130days

The substance has a half-life of 30 minutes. There has been two cycles that have occurred.

idk the last one

Explanation:

3 0
3 years ago
A car going 22 m/s increases its speed to pass a truck. Five seconds later the car is going 35 m/s. Calculate the acceleration o
jonny [76]

Answer:

I don't know

Explanation:

4 0
2 years ago
Read 2 more answers
To introduce you to the concept of escape velocity for a rocket. the escape velocity is defined to be the minimum speed with whi
Mama L [17]
A projectile fired upward from the Earth's surface will usually slow down, come momentarily to rest, and return to Earth. For a certain initial speed, however it will move upward forever, with its speed gradually decreasing to zero just as its distance from Earth approaches infinity. The initial speed for this case is called escape velocity. You can find the escape velocity v for the Earth or any other planet from which a projectile might be launched using conservation of energy. The projectile of mass m leaves the surface of the body of mass M and radius R with a kinetic energy Ki = mv²/2 and potential energy Ui = -GMm/R. When the projectile reaches infinity, it has zero potential energy and zero kinetic energy since we are seeking the minimum speed for escape. Thus Uf = 0 and Kf = 0. And from conservation of energy,
Ki + Ui = Kf + Uf
mv²/2 -GMm/R = 0
∴ v = √(2GM/R) 

This is the expression for escape velocity. 
3 0
2 years ago
Read 2 more answers
Other questions:
  • With what average speed must you drive your car if your average speed for the entire 23 km is to be 25 km/h?
    10·1 answer
  • What is the frequency of an ocean wave that is traveling at a speed of 45 m/s if it has a wavelength of 3 meters.
    13·1 answer
  • There are 92 naturally occurring elements. How does this relate to the number of compounds?
    12·1 answer
  • Calculate the force on an object that has a mass of 12kg and an acceleration of 4m/s2.
    5·2 answers
  • What is the first step dealing with an injured relationship
    10·2 answers
  • What are three things that travel in waves
    14·2 answers
  • A tourist is walking at a speed of 1.3 m/s along a 9.0-km path that follows an old canal. If the speed of light in a vacuum were
    12·2 answers
  • The thermal conductivity of a sheet of rigid, extruded insulation is reported to be k=0.029 W/m.K. The measured temperature diff
    8·1 answer
  • a jogger does 3.45 E 6 J of work and gives off 1.67 E 6 J of heat. what is the change in her internal energy? show your work​
    9·1 answer
  • What is chronology?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!