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Ratling [72]
3 years ago
12

What is 0.40 as a fraction?

Physics
2 answers:
maxonik [38]3 years ago
8 0
Please remember to post in the right category next time :)

.40 as a fraction is 4/10 or 2/5
the 4 is in the tenths place, so put it over a 10 to make it a fraction.
then, simplify the fraction by dividing the numerator and denominator by 2, and you get 2/5

eimsori [14]3 years ago
3 0
It is 4/10 or 2/5.
0.40 or 0.4 is the same as 4/10
the simplified fraction is 2/5
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Answer: posteintal is like something that is about to happen and kinetic is like the energy while something is moving

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1) An ac source of period T and maximum voltage V is connected to a single unknown ideal element that is either a resistor, and
Lady_Fox [76]

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.

6 0
3 years ago
An iron rod and a copper rod of equal length are each held by hand at one end, with the other end in the flame from a Bunsen bur
lara31 [8.8K]

Answer:

Iron has a higher heat capacity than copper

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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.

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3 years ago
J.J Thompson proposed that atoms were made up of positively charged particles with electrons scattered into them. How did he rea
Harlamova29_29 [7]
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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.


8 0
4 years ago
An elevator is moving upward at 1.00 m/s when it experiences an acceleration 0.37 m/s2 downward, over a distance of 0.79 m. What
Nastasia [14]

Recall that

{v_f}^2-{v_i}^2=2a\Delta y

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\implies v_f=0.64\,\dfrac{\mathrm m}{\mathrm s}

6 0
3 years ago
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