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xxMikexx [17]
3 years ago
11

Mateo’s parents are thinking about investing money to help develop a new fusion power plant. Which issue is most important to co

nsider before making the investment?
a)Fusion has never been controlled, so how have they succeeded in doing it?
b)The fuel is quite limited, so have they discovered a more common fuel?
c)Fusion has been generating electricity for decades, so why build another fusion power plant?
d)Fusion requires high temperatures and pressures, so how have they reduced the energy cost for it?
Physics
2 answers:
Inessa [10]3 years ago
7 0
The answer is A because fusion has never been controlled in a non explosive manner. 
GrogVix [38]3 years ago
4 0
The answer is D i just took the test on e2020 hope this helps 
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Which layer of the sun do we normally see?
astra-53 [7]

Answer: I think its called the "photosphere"

Explanation: Its very unsafe to look at but when you look up at the sun, visible lights radiates the sun so we can see it. Hope this helps!

4 0
3 years ago
The diagram below shows a subduction zone where oceanic crust is sinking into the mantle underneath continental crust as two
Scrat [10]

Metal ores

Explanation:

in an area where subduction has occurred in times past, metal ores are likely to be found.

Metallic ores find subduction zone regions very favorable to crystallize out of a magma.

  • Ores have different modes of formation.
  • Typically, they are found in hydrothermal vents and black smokers of igneous intrusives.
  • These are igneous terrains where metallic sulfides and other minerals crystallize out of magmatic body.
  • Metals in magma usually have large sizes and do not partition easily in the melt.

At a subduction zone, partial melting of the subducting plate forces magma into nearby country rock as an intrusive and to the ocean floor where they form black smokers.

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4 0
3 years ago
A heavy stone of mass m is hung from the ceiling by a thin 8.25-g wire that is 65.0 cm long. When you gently pluck the upper end
Dominik [7]

Answer:

wavelength = 0.8989 m

Explanation:

Given data:

weight of wire is 8.25 g

length of wire is 65 cm

speed of sound in room is 344 m/s

time of returning of pulse is 7.84 ms

There are three time period

Time period = \frac{7.84\times 10^{-3}}{3} = 2.6133\times 10^{-3} s

frequency = \frac{1}{T}

                  =\frac{ 1}{2.6133\times 10^{-3})} = 382.6579 Hz

velocity = wavelength × frequency

wavelength = \frac{velocity}{frequency}

                   = \frac{344}{382.6579}

wavelength = 0.8989 m

6 0
3 years ago
1. Analyze the number line above to describe the motion of the object. Be sure to include starting position, intermediate positi
Colt1911 [192]

1) Distance: 9 m, displacement: +5 m

2) The average speed is 3 m/s

3) The average velocity is +2 m/s

Explanation:

1)

We start by reminding the definitions of distance and displacement:

- Distance: it is the total length of the path covered by an object, regardless of the direction of motion

- Displacement: is the distance in a straight line between the initial position and final position of motion

Let's now analyze the motion represented in the figure:

Initial position: x_0 = -1 m

Intermediate position: x_1 = +6 m

Final position: x_2 = +4 m

Therefore, the distance covered is

distance = |x_1-x_0|+|x_2-x_1|=|+6-(-1)|+|+4-(+6)|=7+2=9 m

While the displacement is:

displacement = x_2 - x_1 = +4 - (-1) = +5 m

2)

The average speed is a scalar quantity defined as

speed=\frac{d}{t}

where

d is the distance travelled

t is the time taken

For the object in this problem,

d = 6 m

t = 2 s

Substituting, we find the average speed:

speed = \frac{6 m}{2 s}=3 m/s

3)

The average velocity is a vector quantity defined as

velocity = \frac{d}{t}

where

d is the displacement

t is the time interval

For the object in this problem,

d = +12 m

t = 6 s

Substituting, we find the average velocity:

velocity=\frac{+12 m}{6s}=+2 m/s

Where the positive sign + indicates the direction of the velocity vector.

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7 0
3 years ago
A hobby rocket reaches a height of 72.3 m and lands 111 m from the launch point with no air resistance. What was the angle of la
Deffense [45]

Answer:

The angle of launch is 52.49 Degree.

Explanation:

The Range R and Height H of a thrown object is calculated using the formula,

R=V₀² sin(2φ)/g

H=V₀²sin²(φ)/g

From these equations it can be written,

V₀²=R g/ sin(2φ)

V₀²=H g/ sin²(φ)

These values are equal so it can be written by equating these equations,

R g/sin(2φ)=H g/sin²(φ)

tan(φ)= 2H/R

Given H=72.3 m and R=111 m, the angle of launch is,

tan(φ)= 2*72.3/111

φ= 52.49 Degree.

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7 0
2 years ago
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