Answer: posteintal is like something that is about to happen and kinetic is like the energy while something is moving
Explanation:
Answer: Capacitor
Explanation:
Given the following ;
At time, t = T/4 ; I = 0
At time, t = T/2 ; I = - Imax
Where T = period
We can confirm what the unknown element is by using the relation, such that the parameters satisfy the stated condition ;
Recall;
I = Iosin(wt + π/2) [for CAPACITOR]
w = 2π/T
At t = T/4
I = Iosin(2π/T(T/4) + π/2)
I = Iosin(π/2 + π/2)
I = Iosin(0)
I = 0
At t = T/2
I = Iosin(2π/T(T/2) + π/2)
I = Iosin(π + π/2)
I = Iosin(0)
I = Iosin(3π/2)
I = Iosin(540/2)
I = Iosin(270)
I = -Io
Note : Io = Imax
Both conditions are met, Hence, the unknown element is a CAPACITOR.
Answer:
Iron has a higher heat capacity than copper
Explanation:
The heat capacity of a substance is defined as the amount of heat required to raise the temperature of an object by 1°C.
The higher the heat capacity of a substance, the longer the time it takes for the substance to become hot when heated.
Since the copper rod becomes too hot to hold much sooner than the iron rod, it means that iron has a higher heat capacity than copper.
First, J.J Thompson experimented with cathode ray tubes: sealed glass tubes at vaccum (without air inside), with two electrons (cathode and anode). When a high voltage was applied a beam of particles left from the cathode and passed throuhg two charged plates (one negative and one positive).
The beam of particles was deflected toward the positively-charged electric plate, which indeicatedd that the particles were negatively charged.
Given that Thompson experimented with different materials (cathode electrodes), that the results were always the same, and that the mass of the electrons were a small fraction (approximately 1/2000) of the hydrogen atom, he concluded that the negatively particle was part of the atom (a subatomic particle).
Also, given that the atom is neutral, he concluded that there were negative and positive particles in any atom, and he speculated that the negative particles (electrons) were scattered into the positive particles which were way more massive.
Recall that

We're given
,
(so we take the upward direction to be positive), and
. Then the final velocity
satisfies


