in which medium speed of sound are fastest?
1. in which medium speed of sound are fastest?
Jawaban:
di mana suara kecepatan sedang paling cepat
Penjelasan:
maaf kalo salh
2. A woman standing 1.0 km away from a storm hears the sound of thunder 3 s after she sees a flash of lightning. Calculate the speed of sound in air.
diket:
jarak (s) = 1 km = 1.000 m
waktu (t) = 3 s
ditanya:
kecepatan (v)....?
jawab:
v = s/tv = 1.000 m / 3 s
v = 333,33 m/s
Jadi, kecepatan bunyi di udara adalah 333,33 m/s.
3. speed of a sound is 32 m/s travels in 2,5 minutes, what is distence?
Penjelasan:
32m/s
2,5 minutes= 150s
32×150=4800 m = 4.5 km
4. In a triathlon, Ari cycles 50 km in 1.75 hours, swims a distance of 1.2 km at an average speed of 2.5 km/h, and runs at an average speed of 9km/h for 10/9 hours. Find his average speed for the entire competition.
Answer:
18.31 km/hrExplanation with steps:
Average speed = Total distance / total timeCycling distance = 50 km, cycling time = 1.75 hr
Swimming distance = 1.2 km, swimming time = 1.2/2.5 = 0.48 hr
Running distance = 9 x (10/9) = 10 km, running time = 10/9 hr
Therefore
Average speed = Total distance / total timeAverage speed = (50 + 1.2 + 10) / (1.75 + 0.48 + (10/9))
Average speed = 61.2 / (3007/900)
Average speed = (61.2 x 900) / 3,007
Average speed = (61.2 x 900) / 3,007
Average speed = 55,080 / 3,007
Average speed = 18 954/3,007
Average speed = 18.31 km/hr
___________
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5. A boat whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is:
30:15=2
2x9/2=9km/hour
6. When plucked, a 0.62m guitar string produces a sound wave with a fundamental frequency of 196Hz. The speed of sound in air is 343m/s. Determine the ratio of the wavelength of the sound wave in air to the wavelength of the waves that travel on the string.
Wavelength of the sound in air: v = f*lambda. You have the speed and the frequency, plug them in.
Wavelength of the sound on the string: The fundamental frequency on a string fixed at both ends (like a guitar string) is such that the length of the string is lambda/2. So lambda = 2*L.
7. a sound wave travels 4000m inside a medium if travels time is 20sec, decide the speed of sound in that medium
Diketahui :
s = 4.000 m
t = 20 s
Ditanya :
v?
Jawab :
v = [tex] \frac{s}{t} [/tex]
v = [tex] \frac{4.000}{20} [/tex]
v = 200 m/s
8. 2. a tortoise can reach speeds of 0.12m/s. work out the speed of a tortoise in kilometer per hour (km/h)
Jawaban:
0,432km/h
Penjelasan dengan langkah-langkah:
m/s -> km/h = 0,12 x 3.600 : 1.000 = 432 : 1.000 = 0,432km/h
9. A car travelled 240 km in 30 minutes.Calculate its speed in m/s
240 km/30 minutes = ..... m/s
240 km= 240.000 m
30 minutes = 1.800 s
240.000 m/1.800 s
=133,3 m/s or 133 m/s
Hopefully can help you:)
10. A particle travels 24.6 km in 30 minutes.Find the speed of the particlesin m/s
Jawab:
The speed is 49.2 km/hr.
Step-by-step explanation:
Given : A particle travels 24.6 km in 30 minutes.
To find : The speed of particle in km/h ?
Solution :
The distance is d=24.6 km
The time is t=30 minutes
Convert into hours :
1min = 1/60 hr
30 min = 0.5 hr
The speed formula is given by :
Speed : Distance/time
Speed : 24,6 / 0.5
Speed : 49,2 km/hr
#Learn more
https://brainly.in/question/11459948
Jawaban:
13,67 m/s
Penjelasan dengan langkah-langkah:
s = 24,6 km= 24600 m
t= 30 minutes= 1800 s
v=s/t
v=24600/1800
v=13,67 m/s
11. A ship measures the depth of a marine waters by using a sound device. The sound is fired at the bottom of the waters and 6 seconds later the reflective sound arrives back on the ship. If the speed of the sound in the water is 800 m / s, determine the depth of the water !
we know that
v(velocity)=800 m/s
t(time)=6 second
d=?
to determine the depth we will use the formula
D=v×t/2
d=800×6/2
=2400 m
or 2,4 km
so the depth of the water is 2400 m or 2,4 km
12. In which medium speed of sound are fastest? 1. Liquid 2. Solid 3. Vacuum 4. Gas
jawab : 2 solid, thanx for give me try to answer
13. the speed of light is ..... the speed sound
the speed of light is faster than the speed of sound
14. in a thriathlon, an athlete swims 750 m in 15 minutes, cycle at an average speed of 40 km/h for 30 minutes. and runs 5 km at an average speed of 3 m/s. find his average speed for the entire competition. giving your answer in km/h
s1=0,75km
s2=40.0,5=20km
s3=5km
s total=25,75km
t1=0,25h
t2=0,5h
3m/s=0,003/1/3600=10,8km/h
t3=5/10,8=0,46h
t total= 1,21h
v average=25,75/1,21=21,3km/h
15. a musical istrument produces a frequency 1700 Hz. If the speed of sound in the air is 340 m/s, then the wavelenght
f = 1700 Hz
v = 340 m/s
Wavelenght (λ) = ...?
Answer:
v = λ×f
λ = v/f
λ = 340/1700
λ = 0,2 m
16. A particle travels 24.6 km in 30 minutes. Find the speed of particle in km/h
Jawaban:
49,2km/h
Penjelasan dengan langkah-langkah:
s = 24,6km
t = 30minutes or 0,5hours
v=s/t
v=24,6/0,5
v=49,2km/h
17. A boat whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is
berikut jawabannya..
18. The speed of sound in air is 343 m/s. Meena heard a clap of thunder 1.5s after the sound was produced. How far was Meena from the thunderstorm?
Rumus untuk menghitung cepat rambat bunyi yaitul;
s = [tex]v.t[/tex]
Maka jarak Meena dari petir adalah 514,5 meter.
Penjelasan dengan langkah-langkah:
Diketahui:
The speed of sound in air is 343 m/s. Meena heard a clap of thunder 1.5s after the sound was produced.
Ditanya:
How far was Meena from the thunderstorm?
Jawab:
Rumus untuk menghitung cepat rambat bunyi yaitul;
s = [tex]v.t[/tex]
s = [tex]343 m/s.(1,5 s)[/tex]
s = 514,5 meter
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19. c) a sound wave of frequency 7.5 khz travels through a steel beam at a speed of 6100 m/s. (i) calculate the wavelength of this sound wave in the steel beam.
Jawaban:
0.8133 m
Penjelasan:
Known :
f : 7.5 kHz
v : 6100 m/s
Asked : wavelength (λ) = ?
Answer
λ = v/f = 6100 / (7500 Hz) = 61/75 = 0.8133 m
20. 5 A car travels 400 km in 3.5 hours. What is the speed of the car in km/h and m/s?
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Is Known from the question
mileage (S )= 400 Kmtime (t )= 3,5 hoursAsked
Speed in Km/h =?
V = s/t
V = 400 km/ 3,5 hours
V= 114,2 km/h
speed in m/s ?
V = s/t
V = 400.000 m /12.600 S
V = 31 ,74 m/s
So, speed of the car in Km/h is 114,2 Km/h , and the speed of the car in m/s is 31 ,74 m/s
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pembuktian
a. V = s/t
114,2 = 400/t
114,2 t = 400
t = 3,50 h
terbukti
b. V = s/t
31,74 = 400.000 /t
t = 12.600 s
terbukti
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