3 years ago

True or false - sound waves can travel across outer space .

Physics

1 answer:

Lilit [14]3 years ago

8 0

Answer:False

Explanation:Sound waves need a mediun

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James Cameron piloted a submersible craft to the bottom of the Challenger Deep, the deepest point on the ocean's floor, 11,000 m

Over [174]

Answer:

$4.1\cdot 10^8 N$

Explanation:

First of all, we need to find the pressure exerted on the sphere, which is given by:

$p=p_0 + \rho g h$

where

$p_0 =1.01\cdot 10^5 Pa$ is the atmospheric pressure

$\rho = 1000 kg/m^3$ is the water density

$g=9.8 m/s^2$ is the gravitational acceleration

$h=11,000 m$ is the depth

Substituting,

$p=1.01\cdot 10^5 Pa + (1000 kg/m^3)(9.8 m/s^2)(11,000 m)=1.08\cdot 10^8 Pa$

The radius of the sphere is r = d/2= 1.1 m/2= 0.55 m

So the total area of the sphere is

$A=4 \pi r^2 = 4 \pi (0.55 m)^2=3.8 m^2$

And so, the inward force exerted on it is

$F=pA=(1.08\cdot 10^8 Pa)(3.8 m^2)=4.1\cdot 10^8 N$

8 0

3 years ago

Read 2 more answers

You decide to impress Grandpa by showing him how fast sound travels. You have a piece of plastic pipe with an adjustable closed

fredd [130]

Answer:

336.96m/s

Explanation:

answer is in photo above

3 0

3 years ago

An object of 4 kg has a speed of 6 m/s and moves a distance of 8 m. What is its kinetic energy in joules.

11Alexandr11 [23.1K]

Answer:

The answer to your question is Ke = 72 J

Explanation:

Kinetic energy depends on the speed of and object and its mass.

Data

mass = m = 4 kg

speed = v = 6 m/s

distance = d = 8 m

Kinetic energy = ke = ?

Formula

Ke = (1/2) mv²

Substitution

Ke = (1/2) (4)(6)²

Simplification

Ke = (1/2)(4)(36)

Ke = (1/2)(144)

Ke = 72 Joules

Result

Ke = 72 J

3 0

3 years ago

A penny is dropped from the top of a 180m building. How much time will it take to fall to the ground?

lawyer [7]

Answer:

9.9 seconds

Explanation:

hope this helps :)

8 0

3 years ago

Do you think the amount of positive charge on the glass after rubbing it with silk cloth will be equal to the amount of negative

IrinaK [193]

This is not a answer but can’t you just search that up on the internet and get the answer?

5 0

3 years ago