3 years ago

The divisions of time in the Geologic Time Scale represent:

Physics

1 answer:

qaws [65]3 years ago

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Major changes in biodiversity

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Answer:

B) Inertia is the resistance of any physical object

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3 years ago

Which of the following statements is TRUE?

KIM [24]

Hello there!

<span>Which of the following statements is TRUE?

Correct answer: </span>Light waves are electromagnetic waves and sound waves are mechanical waves.

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4 years ago

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A single, nonconstant force acts in the + x ‑direction on an object of mass M that is constrained to move along the x ‑axis. As

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Answer:

Velocity $V = \frac{dx}{dt} = \frac{d}{dt} (P + Qt + Rt^{3})$

$V = 0 + Q(1) + 3Rt^{2}$

V = Q + 3Rt²

at t = 0, $v_{i}$ = Q + 3r(0) ==> Q

at t = T, $v_{f}$ = Q + 3rT²

Work done (W) = ΔKE = $\frac{1}{2} m(v_f^{2} - v_i^{2})$

W = $\frac{1}{2} m[(Q + 3RT^{2})^{2} - Q^{2}]$

W = $\frac{1}{2} m$ [Q² + 9R²T⁴ + 2Q(3RT²) - Q²]

W = $\frac{1}{2} m$ (9R²T⁴ + 6QRT²)

Explanation:

Differentiate the position.

Find the equation for speed.

Find the initial and final speed.

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3 years ago

A children's roller coaster is released from the top of a track. If its maximum speed at ground level is 3 m/s, find the height

san4es73 [151]

Answer:

h = 0.46 m

Explanation:

According to the law of conservation of energy:

Potential Energy Lost by Roller Coaster = Kinetic Energy Gained by Roller Coaster

$mgh = \frac{1}{2}mv^2\\\\2gh = v^2\\\\h = \frac{v^2}{2g}$

where,

h = height = ?

v = speed at bottom = 3 m/s

g = acceleration due to gravity = 9.81 m/s²

Therefore,

$h = \frac{(3\ m/s)^2}{(2)(9.81\ m/s^2)}$

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3 years ago

In complete sentences, describe what causes the phases of the moon.

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The revolution of the moon going around earth is what causes the phases of the moon. It depends on exactly what point the moon is facing the earth and how much light is being produced onto it that causes the different phases!

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4 years ago