Nuclear fusion and fission releases tremendous amount of energy using radioactive material as a fuel.
Fusion and fission are similar in that they both release large amounts of energy.
Nuclear fusion is a process in which two nuclei join to form a larger nucleus.
Nuclear fission is a process in which a nucleus splits into two smaller nuclei.
At first sight, it doesn’t make sense that both fission and fusion release energy.
The key is in how tightly the nucleons are held together in a nucleus. If a nuclear reaction produces nuclei that are more tightly bound than the originals, then the excess energy will be released.
It turns out that the most tightly bound atomic nuclei are around the size of iron-56.
Thus, if you split a nucleus that is much larger than iron into smaller fragments, you will release energy because the smaller fragments are at a lower energy than the original nucleus.
If instead you fuse very light nuclei to get bigger products, energy is again released because the nucleons in the products are more tightly bound than in the original nuclei.
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Answer: C) They both result in products that have less mass than the reactants
Explanation:
Answer: No
Explanation:
Electrons have negative charge. It's charge can be decimal because it's about 1.6*10-19 But number of electrons passing through a metal cannot be a decimal number. If you use Q = ne
Q - total charge
e - Charge of an electrone
n - Number of electrons
You might get decimal value for n but it doesnt mean that it shoud have decimal value . Then you have to get nearest less digit value for answer. We cant divide electrons in to pieces
Answer : The correct option is, (D) They have the same number of electrons in their outermost shells.
Explanation :
Periods : A row in the periodic table is known as periods.
The common features about the elements of a period are :
Each periods has elements with the same number of electron shells or energy levels or shell.
They transition from metal to noble gas that means they move from metal to non-metal and then non-metal to noble gas.
Groups : A column in the periodic table is known as groups.
The common features about the atoms of elements in a same group are :
Each groups has elements with the same number of valance electrons or have same of electrons in their outermost shells.
The elements in the same group have similar chemical properties.
The elements in the same group have similar physical properties.
Hence, the correct option is, (D) They have the same number of electrons in their outermost shells.
The time at which the current through the inductor reaches 63% of the maximum current is 4.85 s
The current is defined as the flow of the charge in the circuit is is the rate of flow of the charge.
At t=0 s there is no current in the circuit because the switch is not closed and the circuit is not complete. The current across the LR circuit increases exponentially, when the switch is closed, and becomes steady after a certain time.
Given that
The value of resistor is .120 ohm
The value of resistor is .330 ohm
The value of resistor is .240ohm
The value of the inductor is .1.6 mh
The voltage applied across the circuit is .9 V
To determine the value of effective resistance of this circuit we need to look at the circuit from inductor’s side i.e., from inductor’s side the resistors is connected in series with the parallel combination of resistors
The effective resistance of the circuit is:
…… (1)
Here, is the effective resistance of the circuit. Now substituting the values.
The current through the inductor is:
...... (2)
Here, is the current across the inductor, io is the maximum current in the circuit and L is the inductance across the inductor.
The current across the inductor is equal to the 63% of the maximum current in the circuit.
The current across the inductor is:
i=0.63io
Substitute 0.63io for 328 ohm , for 1.6 mH and for L in equation (2).
Simplify the above expression.
Taking natural log on both sides and simplify.
Thus, the time at which the current through the inductor reaches 63% of the maximum current is
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The time at which the current through the inductor reaches 63% of the maximum current is or .
Further Explanation:
At there is no current in the circuit because the switch is not closed and the circuit is not complete. The current across the LR circuit increases exponentially, when switch is closed, and becomes steady after certain time.
Given:
The value of resistor is .
The value of resistor is .
The value of resistor is .
The value of the inductor is .
The voltage applied across the circuit is .
Concept:
To determine the value of effective resistance of this circuit we need to look at the circuit from inductor’s side i.e., from inductor’s side the resistors is connected in series with the parallel combination of resistors and .
The effective resistance of the circuit is:
…… (1)
Here, is the effective resistance of the circuit.
Substitute the for , for and for in equation (1).
The current through the inductor is:
...... (2)
Here, is the current across the inductor, is the maximum current in the circuit and is the inductance across the inductor.
The current across the inductor is equal to the 63% or times of the maximum current in the circuit.
The current across the inductor is:
Substitute for , for and for in equation (2).
Simplify the above expression.
Taking natural log on both sides and simplify.
Thus, the time at which the current through the inductor reaches 63% of the maximum current is or .
Learn more:
1. Conservation of energy brainly.com/question/3943029
2. Average translational energy brainly.com/question/9078768
3. The motion of a body under friction brainly.com/question/4033012
Answer Details:
Grade: Middle School
Subject: Physics
Chapter: Current Electricity
Keywords:
Resistor circuit, LR circuit, current, current across inductor, time constant, 4.85 microsecond, 4.85 microsec, 4.85 micros, 4.85*10-6 s, 4.85*10^6 s, 4.85*10-6 sec, 4.85*10^6 sec.
Answer:
As the Earth revolves about the sun, different sky is visible during time of the year. We have winter constellations and summer constellations. But some constellations appear through out the year like Ursa Minor are the ones which lie close to the poles. The Earth rotates about the axis passing through North and south pole. The axis always points towards North. Thus, the constellations near the Poles would be visible throughout the year.