A figure skater stands on one spot on the ice (with negligible friction) and spins around with her arms held in. She then extends her arms, changing her rotational speed. During this process, her angular momentum a. increases b. decreases C. remains the same d. the answer depends on how far she extends her arms e. none of the above

Q: 4.67 Determine the reactions at B and D when b = .C hp 80 N A D 75 mm 250 mm C 90 mm- B 60 mm.

A:

Q: Distinguish between compressions and rarefactions?

A: Compressions and rarefactions

Q: Longitudinal waves show what?

A:

Q: The pitch of sound depends on O frequency O amplitude both of these none of these

A: →Pitch isthat characteristic of a susical sound by which a sound can be    distin guished from a…

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Q: Expplain reflection of sound in an open pipe.

A: Reflection of sound wave:At the end of a tube, due to the impedance mismatch sound wave reflects.

Q: = • CALC A 1.50-m cylinder of radius 1.10 cm is made of a complicated mixture of materials. Its…

A:

Q: Define Newland law of octaves.

A: Definition of Newland law with example is provided below. Please have a good look

Q: Distinguish between compression and rarefaction?

A:

Q: A wave passes from one medium to another medium. Mention one property of wave out of speed,…

A: Explanation:

Q: What does Bragg's law state?

A: The Bragg's law states that. 1. The X-rays, Gamma rays or particle rays that are diffracted from a…

Q: Which list contains only transverse waves

A: There are two categories of wave: Longitudinal wave Transverse wave Longitudinal wave are those…

Q: Why is lightning seen before thunder is heard?

A: lightning seen before thunder is heard

Q: Use the following constants if necessary. Coulomb constant, k = 8.987 × 10° N · m² /C². Vacuum…

A:

Q: What is the nature of ripples produced on the surface of the water?

A: Nature of ripples produced on the surface of the water is

Q: Which is normally greater, the energy in ordinary sound or the energy in ordinary light?

A:

Q: Why it be so hard to drag a rubber over smooth glass keeping in mind that frction is created by…

A: The rubber and the smooth glass are two non conducting material or non polar substance, when the…

Q: Waves and Optics

A: Solution     Given dataThe point on the screen marked with a dot is how much farther from the left…

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Q: What is the relationship between period and frequency? a d They are inverses of each other They are…

A: Required:  The relationship between frequency and period

Q: what is the frequency of light with a wavelenght of 5.10x10-7m

A:

Q: What do all waves transfer?

A: Que. What do all waves transfer.

Q: Refraction changes the of water) of a wave. (think about light entering a bucket O neither speed or…

A: When  а  wаve  trаvels  frоm  оne  medium  tо  аnоther  medium,  the  wave  сhаnges  its  direсtiоn…

Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.