The reaction an astronaut in an earth satellite feels weightless is that the ast

Question

The reaction an astronaut in an earth satellite feels weightless is that the astronaut is beyond the range of the earth's gravity. The astronaut is falling. the astronaut is at a point in space where the effects of the moon's gravity and the earth's gravity cancel. this is a psychological effect associated with rapid motion. The astronaut's acceleration is zero. Two wave types are depicted above. The wave on the top is a _______ wave, while the wave on the bottom is a _____________ wave. Torsional, transverse Longitudinal transverse Transverse, longitudinal Longitudinal, torsional The time for the pulsar in the Crab Nebuls to rotate once is 0.033 s. With what frequency does this rapidly rotating neutron star rotate? 0.033 Hz 30 Hz 0.066 Hz There's no way to know with only that information. The wavelength of a wave on a string is 1.25 m and the wave's frequency is 262 Hz. What's the wave's speed? -330 m/s -210 m/s -660 m/s It depends on the amplitude and is therefore incalculable. A 256 Hz tuning fork is sounded along with a piano string and a beat frequency of 3 Hz is heard. Which could be the frequency of the guitar string? 85 Hz 253 Hz 261 Hz 768 Hz None of these could be the frequency of the guitar string. A clever student decides to measure the speed of sound with a pipe inserted into a bucket of water. The water serves t0 dose the pipe on one end. When using a tuning fork with a frequency of 383 Hz they find the loudest standing wave form in the open-dosed pipe when the pipe has a length of 0.225 m. How fast is the speed of sound inside the air of the pipe? -170 m/s -342 m/s -345 m/s -348 m/s The density of ice is 917 kg/m^3. If you have a cube of ice that's 0.152 m on a side, how much ice (mass) do you have? 320 Kg 3.22 Kg 418 Kg 139 Kg

Explanation / Answer

33 ans

ans

the wave is parallel to string so it is transverse wave

the wave is perpendicular to string so it is longitudinal wave

so the correct option is C

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34 ans

Given that

time t=0.033

now we find the frequency

frequency f=1/t=1/0.033=30 Hz

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35 ans

Given that

frequency f=262 Hz

length l=1.25 m

now we find the speed of wave

wave speed V=f*2L=262*2*1.25=660 m/s

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36 ans

Given that

frequency f1=256 Hz

frequency f2=3 Hz

now we find the beat frequency

the beat frequency f=f1-f2=256-3=253 Hz

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37 ans

Given that

frequency f=383 Hz

length L=0.225 m

now we find the velocity of wave

velocity v=f*4l=383*4*0.225=345 m/s

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38 ans

Given that

density of ice d=917 kg/m^3

length r=0.152 m

basing on the concept of kinematices

now we find the mass of ice

mass =volume*density=0.152^3*917=3.22 kg

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