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3 years ago

PLEASE HELP!!!!! In which medium does sound travel fastest.

Physics

2 answers:

Jobisdone [24]3 years ago

7 0

Answer:

D. Cast iron

Explanation:

Sound requires a medium to travel. More specifically, it relies on medium particles to vibrate, touching each other and propagating the sound through the medium. Knowing that then, it should follow that solids are the best conductors of sound because the particles in a solid are packed tightly together which vibrations travel faster unlike in a gas where it takes a lot for particles to touch since they are so far apart from each other.

So cast iron is the correct answer.

Art [367]3 years ago

3 0

<span>Sound travels fastest through solids, slower through liquids and slowest through gases.

Answer: Cast Iron, D.
</span>

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Yuck! This statement represents which of the folllwoing functions of language

rodikova [14]

Their is NO following options for us to choose from. Please resend in order for somebody's help!

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3 years ago

Kinetic and

beks73 [17]

Answer:

raise the board to a higher angle

Explanation:

Static friction is the force opposite to the applied force.

Static friction is dependent on the angle of inclination, it means as the angle of incline increases, the force of friction will increases as normal force will decrease.

So, if the board will be raised to a higher angle, it will increase the angle of incline and will overcome the static friction and block will be able slide.

Hence, the correct option is "raise the board to a higher angle".

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3 years ago

The current world-record motorcycle jump is 77.0 m, set by Jason Renie. Assume that he left the take-off ramp at 13.0° to the ho

kotegsom [21]

Answer:

The take-off speed is 41.48 $\frac{m}{s}$

Explanation:

Given :

Range $R = 77$ m

Projectile angle $\alpha =$ 13°

From the formula of range,

$R = \frac{v_{o} ^{2} }{g} \sin 2\alpha$

Find the velocity from above equation,

$v_{o} = \sqrt{\frac{gR}{\sin 2 \alpha } }$

$v_{o} = \sqrt{\frac{9.8 \times 77}{\sin 26} }$ ( ∵ $g = 9.8$ $\frac{m}{s^{2} }$ )

$v_{o} = 41.48$ $\frac{m}{s}$

Therefore, the take-off speed is 41.48 $\frac{m}{s}$

7 0

4 years ago

a coin press creates a pressure of 3.20*10^8 Pa on a nickel of radius 0.0106 m. how much force does the press exert on the coin?

Naya [18.7K]

Answer:

1.13 x 10⁵N

Explanation:

Given parameters:

Pressure of the coin press = 3.2 x 10⁸ Pa

radius of the nickel coin = 0.0106m

Unknown:

Force of the press on coil = ?

Solution:

Our knowledge of pressure will help us solve this problem.

Pressure is defined as the force applied per unit area on a body.

Pressure = $\frac{force}{area}$

Force = Pressure x Area

Since the pressure is known;

Area of the coin = Area of a circle = π r²

where r is the radius of the coin;

Area of the coin = π x 0.0106² = 3.53 x 10⁻⁴m²

Force = 3.2 x 10⁸ x 3.53 x 10⁻⁴ = 1.13 x 10⁵N

3 0

3 years ago

The simplest form of a substance

likoan [24]

Answer :

C) Atom

Actual answer should be element but depends on the way you interpret the question and the options given to answer it

Explanation :

Atom is the most basic unit of any substance and is what molecules are made of.

Hope it helps if it does let me know by thanking

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3 years ago