Hey! I need help with this question. Will give Brainlest!! Thanks in advance!

Physics

2 answers:

Evgesh-ka [11]3 years ago

8 0

The answers are In the book

yaroslaw [1]3 years ago

4 0

A) is Ep= mgh so since you already have mg which is 500N and h which is 10m multiply them and your answer will be 5000J potential energy.

b) do the same thing as a except use 5m instead of 10m which gives you 2500N

c) the potential energy is transferred to kinetic since he’s at bottom of hill of mechanical energy. so kinetic energy would be 5000J since that’s the mechanical energy since at top of hill there’s 0 kinetic, making all the potential the same as the mechanical

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The auroras occur in the

kotykmax [81]

Answer:

Ionosphere

Explanation:

The thermosphere reaches 600 kilometres just above mesosphere and begins immediately above the mesosphere. This layer is where the aurora and satellites appear.

The ionosphere is the comprehensive career of the mesosphere because most of the thermosphere, located 80–400 kilometres just above ground atmosphere.

Auroras — magnificent flowing streaks of light seen in the night sky – appear in this location.

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3 years ago

A student lifts a 90 pound (lb) ball 4 feet (ft) in 5 seconds (s). How many joules of work has the student completed?

scZoUnD [109]

Wending your way through this question and the list of choices
is like running through a corn-maze on a moonless night with
your eyes closed.

Work = (force) x (distance)

Keeping with the units used In the question ...

   Work = (90 pounds) x (4 feet) = 360 foot-pounds .

If you want the work expressed in joules, then you need to convert
pounds and feet to newtons and meters.

   (90 pounds) x (4.448 newtons/pound) = 400.32 Newtons

   (4 feet) x (1 meter / 3.28084 feet) = 1.219 meters

Work = (force) x (distance)

      = (400.32 newtons) x (1.219 meters) = 488.1 joules .

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3 years ago

Newton’s 3rd law is also known as the law of

NemiM [27]

Answer:

Action and Reaction

Explanation:

For every force, there is one of equal and opposite also. Think of it this way. When you try to push on a wall, you are applying a force. However, that wall is also pushing back on you with that same force. You can also see this when you high five someone. You can slap as hard as you want to their stationary hand, but due to the 3rd law, you're both going to be left with red hands do to the amount of force applied.

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3 years ago

Describe the wavelength of a longitudinal wave.

Lilit [14]

In Longitudinal waves, particles of the medium vibrate around their mean positions. Their amplitude of vibration is in the direction of the propagation of the wave. In transverse wave of longitudinal wave, the wavelength is always the distance between two particles which are in the same phase.

If we take pressure waves, (sound waves), we have pressure variations created by sound wave along its path. Pressure is maximum at compression regions and pressure is minimum at rarefaction region. In between the two, pressure of air remains as the pressure when there is no wave.

The wave length is then the distance between two consecutive rarefactions or two consecutive compression regions.

It is also the distance traveled by the wave in one time period. Time period is the time the particles in the medium take to vibrate towards the end, turn back to reach the other end of their oscillation and then reach back their position.

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3 years ago

5. You are skateboarding on top of a small hill and take a break. You have 100 J of potential energy. If

Sholpan [36]

Given the potential energy of 100 J, the height of the hill is 0.128 m (12.8 cm)

Explanation:

The gravitational potential energy of an object is given by:

$U=mgh$