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3 years ago

2. True or false. As a wave travels through a given material its velocity changes.

Physics

1 answer:

laila [671]3 years ago

6 0

Answer:

ture

Explanation:

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3 years ago

Read 2 more answers

The same 2000 kg truck formerly traveling at 32 m/s, plows into a

kvasek [131]

Answer: |F| = 1.28 x 10⁵ N

Explanation:

an impulse results in a change of momentum

FΔt = mΔv

F = m(vf - vi)/t

F = 2000(0 - 32) / 0.5

F = -128,000

|F| = 1.28 x 10⁵ N

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3 years ago

When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of

algol13

Answer:

0.0768 revolutions per day

Explanation:

R = Radius

$\omega$ = Angular velocity

As the mass is conserved the angular momentum is conserved

$I_1\omega_1=I_2\omega_2\\\Rightarrow \frac{I_1}{I_2}=\frac{\omega_2}{\omega_1}$

Moment of intertia for solid sphere

$I_1=\frac{2}{5}MR^2\\\Rightarrow I_1=0.4MR^2$

Moment of intertia for hollow sphere

$I_2=\frac{2}{3}M(4.3R)^2\\\Rightarrow I_2=12.327MR^2$

Dividing the moment of inertia

$\frac{I_1}{I_1}=\frac{0.4MR^2}{12.327MR^2}\\\Rightarrow \frac{I_1}{I_2}=0.032$

From the first equation

$\omega_2=\omega_1\frac{I_1}{I_2}\\\Rightarrow \omega_2=2.4\times 0.032\\\Rightarrow \omega_2=0.0768\ rev\day$

The angular velocity, in revolutions per day, of the expanding supernova shell is 0.0768 revolutions per day

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3 years ago

2. True or false. As a wave travels through a given material its velocity changes.​

2. True or false. As a wave travels through a given material its velocity changes.