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3 years ago

An increase in temperature will ___________ the speed of a sound wave?

Physics

2 answers:

lbvjy [14]3 years ago

3 0

I think it’s cause no change i think

Sergeu [11.5K]3 years ago

3 0

Answer:

increase

Explanation:

The speed of sound has a direct relationship with temperature. As the temperature of an object goes up, the speed of sound increases. This change in speed occurs because a higher temperature reduces the density of material and as a result, the speed of sound increases

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Find the speed at which Superman (mass=78.0 kg) must fly into a train (mass = 17863 kg) traveling at 75.0 km/hr to stop it. Runn

lapo4ka [179]

Answer with Explanation:

We are given that

Mass of superman=m=78 kg

Mass of train=m'=17863 kg

Speed of train=u'=75 km/h= $75\times \frac{5}{18}=20.8 m/s$

$1 km/h=\frac{5}{18} m/s$

Let initial speed of superman=u

Momentum=mv

Using the formula

$78u=17863\times 75$

$u=\frac{17863\times 75}{78}$

$u=17175.9 km/h$

Average horizontal force=0.58

Deceleration $a=-0.58\times 9.8=-5.68 m/s^2$

Final speed of train=v'=0

$v=u+at$

Using the formula

$0=20.8-5.68t$

$5.68t=20.8$

$t=\frac{v'-u'}{a}=\frac{0-20.8}{-5.68}$

$t=3.66 s$

$v^2-u^2=2as$

Using the formula

$0-(20.8)^2=2(-5.68)a$

$(20.8)^2=2(5.68)s$

$s={\frac{(20.8)^2}{2(5.68)}=38.1 m$

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Butoxors [25]

Answer:

The atomic number

Explanation:

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