Classical Mechanics Answers

Waves are propagating on the surface of water towards the shore with a velocity of 1.5 m/s. The distance between two neighboring crests is six meters. There is a piece of wood somewhere further in the water that turns up and disappears periodically as the water waves when you are looking at it from the shore. Calculate the time interval between two turn-ups.

Which statement is true?

A: In case of longitudinal waves the direction of oscillation and propagation are perpendicular to each other.

B: Mechanical waves can only be transverse.

C: Mechanical waves propagate as transverse waves only in solid materials (and partially on liquid surfaces).

D: Waves always carry material.

The parameters of the spring oscillator shown by the figure are: m = 3 kg and k = 300 N/m. We displace the ball to the left by s = 10 cm from the equilibrium position, then release it. Let us assume there is no loss of energy in the system! Calculate:

a) the natural frequency of the system,

b) the period of the oscillation,

c) the amplitude of the oscillation! 

Let us consider a swing as a harmonic oscillator! The velocity of the swing at the lowest position is 3 m/s. The acceleration at the highest point is 3 m/s2 . Write down the displacement-time function!

A 1kg of water initially at 25 degrees Celsius is brought to boil at 100 degrees. This process is then continued until all the water is completely turned into steam and evaporate. How much heat energy was used in the process if the Latent heat of vaporization is 2260kJ/kg?

Waves are propagating on the surface of water towards the shore with a

velocity of 1.5 m/s. The distance between two neighboring crests is

six meters. There is a piece of wood somewhere further in the water

that turns up and disappears periodically as the water waves when you

are looking at it from the shore. Calculate the time interval between

two turn-ups.

Which statement is true?

A: In case of longitudinal waves the direction of oscillation and

propagation are perpendicular to each other.

B: Mechanical waves can only be transverse.

C: Mechanical waves propagate as transverse waves only in solid

materials (and partially on liquid surfaces).

D: Waves always carry material.

A 6 L bottle contains 16·1023 N2 molecules. Find the

a) amount of substance and

b) the pressure of the nitrogen gas if its temperature is 0 °C and it is considered ideal.

Could you explain b) in detail please?

Your materials are a plank of wood, a ruler, protractor, and photo gate. Describe an experiment determining the coefficient of kinetic friction between the plank of wood and the tissue box. Assume that you are on Earth

and the downwards direction is negative and the upwards direction is positive and that the mass of the tissue box is 143.7 grams.