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dalvyx [7]
3 years ago
6

1. first nuclear reactor

Physics
2 answers:
IRISSAK [1]3 years ago
7 0
The correct matches are as follows:

<span>1. first nuclear reactor 
</span>Fermi - an italian physicist who made the first nuclear reactor<span>
2. </span>1/0 η<span>
 </span>atomic mass <span>
3. decaying nuclei 
</span>fission<span> - nuclear reaction from a heavy elements to lighter elements
4. number of neutrons and protons 
</span>neutron <span>
5. builds heavier elements 
</span>fusion - nuclear reaction from two or more elements to a heavier element<span>
6. discovered radioactivity 
</span>Curie<span>
7. unit of radiation 
</span> Becquerel  
umka2103 [35]3 years ago
5 0

Answer:

atomic mass: 4.

fusion: 5

fission: 3

curie: 7

Becquerel:6

Fermi: 1

neutron: 2

Explanation:

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Please Help On These 2 Questions!!!!! I severely need help!!!!!!
lys-0071 [83]
3. In a uniform electric field, the equation for the magnitude of the magnetic field is E=(V/d). V= voltage d= distance. If the magnetic field magnitude is constant , as stated in your problem, then the voltage must stay the same otherwise the value of "E" would change". And the problem already told us the "E" is uniform and so, not changing. Does that make sense?

4a. If the magnetic field lines are equally spaced apart, in other words share the same density. Then we know that the magnitude of the magnetic field is unchanging. This is because the density of of the magnetic field lines(how many are in a certain area) is related to the magnitude being expressed by the electric field. Greater magnitude is expressed by the presence of more lines (higher line density) 

4b. The electric potential is measured in Volts(V) and is uniform along  the same equipotential line. What is an equipotential line(gray)? It is a line drawn perpendicular(forms a right angle with) to the magnetic field lines(black) to show the changes in electric potential. One space where electric potential will always be the same because it will always be equal to 0 Volts is exactly in between a positive and negative charges of equal charge value I have pointed to this line with a purple arrow in my picture.

I really hope this makes sense to you and that my pictures help! :)

3 0
3 years ago
A machine does 1500 joules of work in 30 second What is the power of the machine
lesya [120]
This is simple as power in watts is equal to joules per second so we can do 1500 joules divided by 30 seconds which equals 50 watts
8 0
3 years ago
A ball is dropped from rest at height of 20m. If it loses 25% of its kinetic energy when it strikes the ground. What is the heig
victus00 [196]

Answer:

15 meters

Explanation:

The inicial energy of the ball is just potencial energy, and its value is:

E = m * g * h = m * g * 20,

where m is the ball mass, and g is the value of gravity.

In the moment that the ball strickes the ground, all potencial energy transformed into kinetic energy, and 25% of this energy is lost, so the total energy at this moment will be:

E' = 0.75 * E = 0.75 * m * g * 20 = 15*m*g

This kinetic energy will make the ball goes up again, and at the maximum height, all kinetic energy is transformed back into potencial energy.

So, as the mass and the gravity are constants, we can calculate the height the ball will reach:

E' = m*g*h = 15*m*g -> h = 15 meters

6 0
3 years ago
What is the purpose of a rearview mirror in a car?
Shalnov [3]
The third choice.

The driver wants to see the object that is behind him. The light reflects off the mirror into the eyes of the driver portraying the object behind him
5 0
3 years ago
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I need help with the circled one
Whitepunk [10]
Yes the answer is yes 
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