E = 0.25 = m*g*h
<span>h = 0.25/(m*g) = 0.25/(0.125*10) = 0.25/1.25 = 1/5 = 0.20 m
I hope this helps you have a great day and im sorry it took so long to get an answer</span>
Answer:
La velocidad del haz de electrones es 1.78x10⁵ m/s. Este valor se obtuvo asumiendo que el campo magnético dado (3500007) estaba en tesla y que la fuerza venía dada en nN.
Explanation:
Podemos encontrar la velocidad del haz de electrones usando la Ley de Lorentz:
(1)
En donde:
F: es la fuerza magnética = 100 nN
q: es el módulo de la carga del electron = 1.6x10⁻¹⁹ C
v: es la velocidad del haz de electrones =?
B: es el campo magnético = 3500007 T
θ: es el ángulo entre el vector velocidad y el campo magnético = 90°
Introduciendo los valores en la ecuación (1) y resolviendo para "v" tenemos:
Este valor se calculó asumiendo que el campo magnético está dado en tesla (no tiene unidades en el enunciado). De igual manera se asumió que la fuerza indicada viene dada en nN.
Entonces, la velocidad del haz de electrones es 1.78x10⁵ m/s.
Espero que te sea de utilidad!
Question: 5
The length of the pendulum is 7.6 m.
<h3>What is the expression of length of a pendulum in term of time period?</h3>
- Time period of the pendulum (T) = 2π×√(L/g)
- L= length of pendulum, g = acceleration due to gravity on earth
So, L = T²g/4π²
<h3>What is the length of the pendulum, if the time period is 3.20 s and acceleration due to gravity becomes 3×g?</h3>
- T= 3.20 s
- L = (3.2²×3×9.8)/4π²
= 7.6 m
Thus, we can conclude that the length of the pendulum is 7.6 m i.e option C is correct.
Learn more about the pendulum motion here:
brainly.com/question/15261645
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Question: 6
The object takes 2.55 seconds to reach the ground.
<h3>What is the expression of time taken to reach the earth surface by an object?</h3>
- From the conversation of energy, (1/2)mv²=mgh
- So, v=√(2gh)
- From Newtown's equation of motion, v=u+at
- Here, a= acceleration due to gravity which is g
- So, √(2gh)=gt
t= √(2h/g)
<h3>What is the time taken by an object dropped from 31 m to reach the ground?</h3>
t= √(2×31/9.8)
= 2.55s
Thus, we can conclude that the option A is correct.
Learn more about the conversation of energy here:
brainly.com/question/24772394
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Answer:
1.5×10^4 N
Explanation:
mass of earth M= 6×10^(24) kg
mass of object m= 6.5×10^2 kg
distance between them R = 4.15×10^6 m
we know from the newtons law of gravitation
putting values in the above equation we get
F= 1.5×10^4 N
the gravitational force between earth and the object
= 1.5×10^4 N
This reaction would be classified as a double displacement or replacement reaction. This is because the atoms/groups of atoms within each compound are swapped or have broken bonds and reformed with other atoms/groups, where each of them has been replaced with their counter metal or nonmetal in the equation.