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Feliz [49]
3 years ago
9

Think about the pencil-dropping activity that you did in the introduction. What did the target finally look like?

Physics
1 answer:
s344n2d4d5 [400]3 years ago
3 0

Answer:

By dropping a pencil from a certain fixed height again and again it will make the target super messay with marks of dot everywhere on the target and some even out side the target.

Explanation:

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The moon is significantly smaller than the sun. Why is the moon able to fully block the sun from our view on
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The moon is 400x smaller but it's also 400x closer so it looks the same size even though it's not

Explanation:

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A number of stars that orbit each other bound by gravitational attraction.
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A 200. Kg load of bricks is to be lifted from the ground to the top of a 30.0 m high building in 30.0 s. If a 75.0 N frictional
coldgirl [10]

Answer:

The minimum power the motor would need is 2035 Watts.

Explanation:

the minimum power motor needed is given by the total work done on the load, Wtot and the total time it takes the load to be lifted, given by:

P = Wtot/t

the forces doing works on the load is the gravitational force, Wfg and the frictional force, Wf the total work done on the load is:

Wtot = Wfg + Wf

        =  m×g×d + f×d

        = d×(m×g + f)

        = (30)×(200×9.8 + 75)

         = 61050 J

it takes t = 30s for the load to be lifted high the building, the minimum power neeed is then:

P = Wtot/t

  = (61050)/(30)

  = 2035 Watts

Therefore, the minimum power the motor would need is 2035 Watts.

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3 years ago
Pls help i’ll give brainliest if you give a correct answer!!
Pepsi [2]

Answer:

its1. the normal force extered on the apple by the tabel

4 0
3 years ago
Problems of nuclear energy and solutions for them plz
Stells [14]

Nuclear energy is a disruptive issue that numerous individuals have blended emotions about. Nuclear power has numerous hazardous impacts to nature and the general population living close to a power plant. Numerous nations utilize nuclear power as a substitute wellspring of electrical energy from petroleum products. Nuclear energy must be dealt with outrageous consideration or it could prompt shocking harms. These issues included radiation, discarding nuclear waste, and surprising expenses of structure and keeping up power plants. Be that as it may, while it is incredibly risky to utilize nuclear energy, it provides a substitute wellspring of energy that does not contaminate the air. Give us a chance to take a gander at what nuclear energy is and where it originated from.

Most early nuclear research was centered around creating viable weapons for use in World War II. After World War II, the legislature enabled nuclear energy to be produced for resident use. We produced our first power from nuclear energy in 1951. As indicated by the European Nuclear Society, as of end 2011 the all out power generation since 1951 adds up to 69,760 billion kWh and the combined working knowledge added up to 15,080 years by end of 2012. In light of mishaps and open hesitance for them another nuclear power plant has not been arranged in the U.S. since 1973.

Things being what they are, what is nuclear energy? As indicated by the EPA, nuclear energy begins from the part of uranium particles in a procedure called splitting. Splitting discharges energy that can be utilized to make steam, which is utilized in a turbine to produce power. Nuclear energy is commonly utilized in a consolidate blend with Uranium and Plutonium. EPA further states, in the plant’s nuclear reactor, neutrons from uranium particles slam into one another, discharging warmth and neutrons in a chain response. This warmth is utilized to create steam, which controls a turbine to produce power. Lamentably, nuclear energy likewise creates some terrible results like tritium, cesium, krypton, neptunium and iodine.

Give us a chance to discuss would could it be that makes nuclear energy so awful for nature and to individuals living close power plants. Give us a chance to begin with the perilous data and learning of this procedure. Information of how to make control plants is shared among numerous countries. The issues with sharing this information, is that nations will approach the learning of how to make nuclear weapons, which could be awful for certain countries. The Global Energy Office or IEA is in charge of energy in numerous nations, however some have censures them for not having the option to keep the information from antagonistic nations.

Right now, there are no profound land transfer spots or offices. It appears that the vast majority see that since the measure of waste is so little there is no requirement for it and that the more it is put away the simpler it is to deal with. A few nations additionally reuse their loss to utilize again however that likewise has numerous issues that go with that technique. There have been recommendations for these destinations in nations like Finland and Sweden, yet none have been made yet. The US thought about setting a site in Nevada to dump nuclear waste.

4 0
3 years ago
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