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harina [27]
3 years ago
8

Please Hurry I'll Mark Brainlest

Physics
2 answers:
Natalija [7]3 years ago
4 0

Answer:

2) the sounds pitch

The strength or level of sound pressure

please give brainliest

have a nice day!

Montano1993 [528]3 years ago
3 0
The sounds volume, it can’t be pitch cause frequency affects pitch and it can’t be duration that’s just the total length of wave, and it can’t be frequency cause that affects pitch
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As shown in the diagram below, a rope attached to a 500.-kilogram crate is used to exert a force of 45 newtons at an angle of 65
kaheart [24]

Answer:

19.01 N

Explanation:

F = Force being applied to the crate = 45 N

\theta = Angle at which the force is being applied = 65^{\circ}

Horizontal component of force is given by

F_x=F\cos\theta\\\Rightarrow F_x=45\times \cos65^{\circ}\\\Rightarrow F_x=19.01\ \text{N}

The horizontal component of the force acting on the crate is 19.01 N.

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3 years ago
For a human zygote to become an embryo it must undergo
slava [35]
Only mitotic divisions change the zygote to embryo. The other sentences are related to the way zygote is created
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The position-time equation for a certain train is
astraxan [27]

Answer:

a=4.8m/s^2

Explanation:

Hello,

In this case, since the acceleration in terms of position is defined as its second derivative:

a=\frac{d^2x(t)}{dt^2}=\frac{d^2}{dt^2}(2.9+8.8t+2.4t^2)

The purpose here is derive x(t) twice as follows:

a=\frac{d^2x(t)}{dt^2}=\frac{d}{dt}(8.8+2*2.4*t)\\ \\a=4.8m/s^2

Thus, the acceleration turns out 4.8 meters per squared seconds.

Best regards.

8 0
4 years ago
Explain how motion and energy are related to roller coasters, please be specific!
Fittoniya [83]
Because when an object is in motion it has kinetic energy
4 0
3 years ago
You stand 17.5 m from a wall holding a softball. You throw the softball at the wall at an angle of 30.5 ∘ from the ground with a
emmainna [20.7K]

Answer: h = 20.92 m

Explanation: By using the law of conservation of energy, the kinetic energy of the ball equals it potential energy.

Kinetic energy =mv^2/2

Potential energy = mgh

Where m = mass of the object, v = velocity of object = 23.5 m/s

g = acceleration due gravity = 9.8 m/s^2

mv^2/2 = mgh

m cancels out each other on both sides , hence we have that

v^2 = 2gh.

We want the ball to move towards the wall (horizontal motion), hence we need the horizontal component of the velocity since the velocity is inclined at an angle of 30.5 to the ground (horizontal).

Hence v = 23.5 × cos 30.5, v = 20.248 m/s

Recall that v^2 = 2gh

(20.248)^2 = 2×9.8×h

409.98 = 19.6 h

h = 409.98/ 19.6

h = 20.92 m

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3 years ago
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