Questions
What are some examples of supersonic wings? Double-wedge airfoil Thick cambered airfoils Swept wings All of...

What are some examples of supersonic wings?

Double-wedge airfoil

Thick cambered airfoils

Swept wings

All of the above

A and C above

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A 4.70 kg block hangs from a spring with spring constant 2300 N/m . The block...

A 4.70 kg block hangs from a spring with spring constant 2300 N/m . The block is pulled down 5.50 cm from the equilibrium position and given an initial velocity of 1.10 m/s back toward equilibrium.

1) What is the frequency of the motion?

2) What is the amplitude?

3) What is the total mechanical energy of the motion?

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explain current and circuits with resistors connected in series and in parallel. Also give examples. not...

explain current and circuits with resistors connected in series and in parallel. Also give examples.
not by hand please and do not copy others work from chegg.
Thanks

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On a frictionless air table, Puck A with mass ?A = 0.120 kg is moving at...

On a frictionless air table, Puck A with mass ?A = 0.120 kg is moving at speed ?A = 2.80 m/s in the +? direction when at the origin it hits Puck B (of mass ?B = 0.140 kg), which is initially at rest. Puck A is deflected in the collision into a final velocity of ?'A = 2.10 m/s at an angle of 30° from the + ? axis. The collision is not elastic.

a) Write down equations expressing conservation of momentum in both the ? and ? directions.

b) Solve the equations for velocity (?'B, ?'B) of Puck B.

c) What fraction of the initial kinetic energy is lost in this collision?

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1.explain why changing the axis of rotation of an object chances its monent of inertia ?...

1.explain why changing the axis of rotation of an object chances its monent of inertia ?
2. Why does a long pole help a tightrope walker stay balanced?
3. Stars orginate as large bodies of slowly rotating gas. Because of gravity, these clumps of gas decrease in size . What happens to the angular speed of a star as shrinks?explain.

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A 1.08 kg copper rod rests on two horizontal rails 0.84 m apart and carries a...

A 1.08 kg copper rod rests on two horizontal rails 0.84 m apart and carries a current of 60 A from one rail to the other. The coefficient of static friction between rod and rails is 0.53. What is the smallest magnetic field (not necessarily vertical ) that would cause the rod to slide?

A) What is the angle of B from the vertical? (deg)

B) What is the magnitude of B?

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1. Describe location in the universe. 2. Compare and contrast distance, time, and speed. 3. Discuss...

1. Describe location in the universe.

2. Compare and contrast distance, time, and speed.

3. Discuss the speed of light and the theory of special relativity.

4. Discuss inertia and momentum and the difficulties accelerating to speed of light.

5. Compare and contrast Solar Sails, Ion Engines, and Warp Drives - accelerating in space.

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Astronomers estimate that there are between 200 billion to 400 billion stars contained within the Milky...

Astronomers estimate that there are between 200 billion to 400 billion stars contained within the Milky Way and Andromeda Galaxy probably has 1 trillion stars. There may be around 500 billion galaxies in the observable universe.

So, my question is, statistically speaking because of the number of stars, there is should be lots of chances of stars going supernova; where at times they glow brighter than a whole galaxy. Why then do we not see many supernovas, for example like the 1987A? Why have we not been able to see one in our own galaxy since the SNR G1. Should there not be more supernovas in surrounding galaxies and even our own one as it has around 400 billion stars.

I appreciate that there are different types of stars and various life span, but our galaxy being almost as old as the universe, surely there should be stars dying all the time.

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3.   Resistors and capacitors are not marked with their exact values, but only approximate values with...

3.   Resistors and capacitors are not marked with their exact values, but only approximate values with a tolerance. Determine the tolerance marked on the resistors and capacitors you are using. If there is a discrepancy between the two quantities compared in Question 2, can the tolerance values explain the difference?

7.What fraction of the initial potential remains after one time constant has passed? After two time constants? Three?

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A pair of speakers separated by distance d = 0.640 m are driven by the same...

A pair of speakers separated by distance d = 0.640 m are driven by the same oscillator at a frequency of 681 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers as in the figure below. (Use v = 343 m/s.) Two speakers are side by side, with one speaker on the left and one on the right. The speakers are separated by a distance d and emit sound waves in the same direction. A man stands directly in front of the speaker on the right but a distance x away from the speaker. (a) How far must the observer walk before reaching a relative maximum in intensity? m (b) How far will the observer be from the speaker when the first relative minimum is detected in the intensity? m

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John detects a distant meteoroid moving toward earth on a straight line that is 3Re from...

  1. John detects a distant meteoroid moving toward earth on a straight line that is 3Re from earth center as shown. She is assigned by NASA to find out if the meteoroid will be deflected toward earth and if so to what value its speed must be increased to avoid coming to earth.

What minimum speed did John calculate for the meteoroid to be moving in order not to be deflected toward earth by earth

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Part 1 - A projectile is launched vertically from the surface of the Moon with an...

Part 1 - A projectile is launched vertically from the surface of the Moon with an initial speed of 1170 m/s. At what altitude is the projectile's speed two-fifths its initial value?

Part 2 - A mass attached to a spring oscillates with a period of 3.11 s. If the mass starts from rest at x = 0.0440 m and time t = 0, where is it at time t = 2.83 s?

PLEASE POST THE ANSWERS TO BOTH PARTS CLEARLY, ALSO PLEASE RESPOND IF SOMETHING IS INCORRECT, THANK YOU!

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explain difference limen for frequency and loudness difference limen

explain difference limen for frequency and loudness difference limen

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Fourier's theorem, which essentially states that a real-time function, such as the pressure changes occurring near...

Fourier's theorem, which essentially states that a real-time function, such as the pressure changes occurring near the surface of the eardrum, can be converted into a spectral representation of the sound. In other words, a sound can be described in either the temporal domain or the frequency domain. Briefly discuss the importance of Fourier's theorem in relation to the physical aspects of sound and to the hearing sciences in general.

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Light, heat ... energy - are all electromagnetic waves. Discuss the differences between them.

Light, heat ... energy - are all electromagnetic waves. Discuss the differences between them.

In: Physics