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3 years ago

Please help asap!99 points

Physics

2 answers:

Artemon [7]3 years ago

5 0

Answer:

Explanation:

1) Potential energy is energy due to an object's position relative to a reference. The higher the object, the larger its energy.

2) Potential energy is highest at Point A as it is the highest.

3) Kinetic energy is energy due to an object's motion relative to a reference. The fastest the object, the larger its energy.

4) Kinetic energy is highest at Point C as the speed there is the highest.

vladimir2022 [97]3 years ago

3 0

Answer:

1. Define potential Energy: Potential energy is a type of energy an object has because of its position.

2. Where is the potential Energy the highest in the picture? : A

3. Define Kinetic Energy: The energy of a body or a system with respect to the motion of the body or of the particles in the system.

4. Where is the Kinetic Energy the highest in the picture? : C

I hope this helps you!

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A paleontologist estimates that when a particular rock formed, it contained 12 mg of the radioactive isotope potassium-40, which

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Answer:

$t = 2.52 billion \:years$

Explanation:

As we know by radioactivity law

$N = N_o e^{-\lambda t}$

so here we will have

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$N_o = 12 mg$

now we will have

$3 = 12 e^{-\lambda t}$

$\lambda t = ln 4$

now we also know that

$\lambda = \frac{ln2}{1.26 \times 10^6 yrs}$

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3 years ago

A source emits sound uniformly in all directions. There are no reflections of the sound. At a distance of 12 m from the source,

yaroslaw [1]

Answer:

1.58 W

Explanation:

Since the sound spreads uniformly in all directions, it must be in a form of a circle with radius of 12 m. So the area of the circle is

$A = \pi r^2 = \pi 12^2 = 452.389 m^2$

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3 years ago

Example of energy transfer from potential to kinetic and back

Alex_Xolod [135]

Swimmer and Divers. The Potential energy is transferred into Kinetic energy, and allows the diver to submerge into the water. The Kinetic energy then allows the diver to submerge and dive into the water. Potential energy however, is needed to allow the diver to get back out of the water after diving to get up and go and dive again, and then the Kinetic energy is transferred back to Potential energy to repeat the process.

Hope :) -Emilie Xo this is right and it helps! Xo

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2 years ago

Light incident upon a pane of glass slows down in passing through the glass, Does it emerge at a slower speed or at its initial

Simora [160]

Answer:

It will emerge at its initial speed not a slower speed.

Explanation:

It will emerge at the initial speed because the medium at the point of emergence is the same as the medium before incidence.

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3 years ago

The earth rotates every 86,160 seconds. What is the tangential speed (in m/s) at Livermore (Latitude 37.6819° measured up from e

Lena [83]

Answer:

The tangential speed at Livermore is approximately 284.001 meters per second.

Explanation:

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