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galina1969 [7]
4 years ago
13

Sound waves cannot travel in a vacuum because

Physics
1 answer:
blsea [12.9K]4 years ago
4 0
A. Nothing for them to travle through,
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A man weighing 989n on earth only 163 N on the moon. His mass on the moon is __ kg. (Use g=9.8m/s)
shtirl [24]

Answer:

16.63265306 Kg

Explanation:

This is a Newtons to weight conversion.

Fg = weight

Fg = N/9.8

4 0
3 years ago
A basketball is shot at 14.0 m/s at a 65.0 degree angle. What is the magnitude only (no direction) of the velocity of the ball 2
Alex787 [66]

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10.4 m/s

Explanation:

I just know it's right!

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3 years ago
What iz inertia ? -,-​
kipiarov [429]

Inertia refers to the tendency of a body to resist changes.

<h3>Inertia</h3>

It is the property of a body to resist change.

A moving body will continue moving until a force acts on it. Unless the acting force is big enough to overcome the inertia of the body, the body will continue moving.

Also, a body at rest will continue resting unless a force big enough to overcome the inertia force is used to displace it.

More on inertia can be found here: brainly.com/question/1358512

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2 years ago
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USPshnik [31]
If the resulting compound feels hot, then it is exothermic. Otherwise, it is endothermic.

Catalysts and inhibitors both affect the reaction rate of a chemical reaction. A catalyst speeds up the rate of reaction, while an inhibitor does the opposite (slows down the reaction rate).
4 0
3 years ago
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 kg/m3 , length 92.6 cm and diameter 2.95 cm fr
slavikrds [6]

Answer:

48.4293354946 N

Yes

Explanation:

d = Diameter of rod = 2.95 cm

h = Length of rod = 92.6 cm

\rho = Density of rod = 7800 kg/m³

g = Acceleration due to gravity = 9.81 m/s²

Volume of rod

V=\dfrac{1}{4}\pi d^2h\\\Rightarrow V=\dfrac{1}{4}\times \pi\times (2.95\times 10^{-2})^2\times 92.6\times 10^{-2}

Mass is given by

m=\rho V\\\Rightarrow m=7800\times \dfrac{1}{4}\times \pi\times (2.95\times 10^{-2})^2\times 92.6\times 10^{-2}\\\Rightarrow m=4.93673144695\ kg

Weight is given by

W=mg\\\Rightarrow W=4.93673144695\times 9.81\\\Rightarrow W=48.4293354946\ N

The weight of the rod is 48.4293354946 N

The mass of the rod is 4.93673144695 kg which is light. So, I will be able to carry the rod without a cart.

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