Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Physics Expert

problem 1: A Surfer sits on his board waiting as waves go by to catch a ride back to shore. Assuming the waves can be modelled as a sine wave given by:

h(x, t) = 1.75 sin (0.03πx - 0.15πt) [m] what is;

a) The maximum vertical movement (rise and fall) that the surfer experiences?
b) The distance between crests of the wave?
c) The angular frequency of the wave?
d) The linear frequency of the wave?
e) Assuming the rider manages to catch one of the waves how fast will they be travelling relative to the shore line?

problem 2: An undersea explosion occurs. If the sea water has density 1.03 x 103 kg/m3 and Bulk Modulus of 2.41x109 Nm-2 ;

a) Determine the velocity of sound in sea water.

b) If the acoustic power released by the explosion is modelled as a continuous 180 kW (for the brief duration of the explosion) determine the distance that an observer would have to be from the explosion for the sound to be just at the “threshold of pain” (1 Wm-2). You may model the distribution of sound energy as “Isotropic”.

c) Find out the sound pressure level in dB at a distance of 1 km from the explosion site.

d) Find out the change in frequency of the 50 Hz component of the explosions complex sound waveform that would be heard by an observer moving at 20 ms-1 directly away from the site of the explosion.

problem 3: A Neutron Star is formed in the aftermath of a Supernova explosion. The star was originally rotating with a period of 20 days and had a mass of 2x1030 kg and radius of 6x108 m. After the explosion the star is found to be rotating with a period of 5x10-3 s.

a) Determine the radius of the collapsed Neutron Star.
b) Determine the density of the material in the Neutron Star
c) State any simplifying assumptions you may have used in determining the above.

problem 4:

a) describe what is meant by the term “Heat Energy”
b) An Aluminium bar 0.5m long, initially at 20 0C is heated until its temperature rises by 50 0C. Determine the change in length of the bar that will occur.
c) Describe what is meant by the term “Adiabatic expansion”.
d) Describe what is meant by the term “Thermal Resistance”.

Physics, Academics

  • Category:- Physics
  • Reference No.:- M91470

Have any Question? 


Related Questions in Physics

Lets assume there is a spring between the cars at impact

Let's assume there is a spring between the cars at impact (good assumption since most cars today are made to crumple instead of bounce off). What would the energy of the each mass do to the spring? Where would that energ ...

On the surface of planet mars the acceleration of gravity

On the surface of planet Mars the acceleration of gravity is estimated as g = 3.7 m/s2. Find the potential energy of a 7 kg stone at the height of 8 m above Mars' surface.

Two ordinary dice are thrown repeatedly the outcome of each

Two ordinary dice are thrown repeatedly; the outcome of each throw is the sum of the two numbers. Joe Shark, who says that 6 and 8 are his lucky numbers, bets even money that a 6 will be thrown before the first 7 is thro ...

A camera is equipped with a lens with a focal length of 40

A camera is equipped with a lens with a focal length of 40 cm. When an object 2.1 m (210 cm) away is being photographed, what is the magnification?

A channel with input x and output y has transition

A channel with input x and output y has transition probability matrix: Assuming an input distribution of the form write down the entropy of the output, H(Y ), and the conditional entropy of the output given the input, H( ...

F every transmitted packet were created by adding together

f every transmitted packet were created by adding together source packets at random with probability 1/2 of each source packet's being included, show that the probability that K' = K received packets suffice for the opti ...

What would be your predictions regarding major social

What would be your predictions regarding major social changes over the coming years (United States of Globally) as we continue in the 21st century? These may be changes in social interaction as social media continues to ...

Starting from rest a runner at a track meet reaches a speed

Starting from rest, a runner at a track meet reaches a speed of 9.6 m/s in 1.5 s. How far does she run during this time, assuming her acceleration is uniform?

Starting from rest a truck travels in a straight line for

Starting from rest, a truck travels in a straight line for 9.0 s with a uniform acceleration of +1.5 m/s2. The driver then applies the brakes for 2.0 s, causing a uniform acceleration of -3.0 m/s2 over that time. (a) Wha ...

1 derive the theoretical formulae for the diode temperature

1. Derive the theoretical formulae for the diode temperature at which the Shockley and SNS current components are equal. 2. Derive the theoretical formulae for the lifetime at which the Shockley and SNS current component ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen