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AnnZ [28]
3 years ago
8

You drop the pendulum bob and it swings from point A to point C, and then back again. Eventually it slows down and stops, settli

ng at point B. A similar pendulum can be found in a pendulum clock. However, the clock pendulum does not stop; it continues to swing back and forth, with a tick-tick. Why is there a difference between the lab pendulum and the clock pendulum?
A) All of the potential energy is not converted to kinetic energy.
B) An enclosed pendulum is not acted on by air resistance or gravity.
C) An external energy source, like a battery, is needed to maintain motion.
Eliminate
D) Air resistance is not a factor since the pendulum is housed inside the clock.
Chemistry
1 answer:
maria [59]3 years ago
6 0
B An enclosed pendulum is not acted on by air resistence or gravity. Plus, pendulum's in clocks are electronic (I think) so that's why it keeps moving back in forth. (at least i think so)

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En los espacios en blanco escribe si la reacción es de síntesis, análisis, simple sustitución o doble sustitucion
Artist 52 [7]
I really can’t help sorry
6 0
3 years ago
a glass container was initially charged with 1.50 mol of a gas sample at 3.75 atm and 21.7C. some of the gas was release as the
butalik [34]

Answer:

0.39 mol

Explanation:

Considering the ideal gas equation as:

PV=nRT

where,  

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 0.0821 L.atm/K.mol

At same volume, for two situations, the above equation can be written as:-

\frac {{n_1}\times {T_1}}{P_1}=\frac {{n_2}\times {T_2}}{P_2}

Given ,  

n₁ = 1.50 mol

n₂ = ?

P₁ = 3.75 atm

P₂ = 0.998 atm

T₁ = 21.7  ºC

T₂ = 28.1 ºC

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15  

So,  

T₁ = (21.7 + 273.15) K = 294.85 K  

T₂ = (28.1 + 273.15) K = 301.25 K  

Using above equation as:

\frac{{n_1}\times {T_1}}{P_1}=\frac{{n_2}\times {T_2}}{P_2}

\frac{{1.50\ mol}\times {294.85\ K }}{3.75\ atm}=\frac{{n_2}\times {301.25\ K  }}{0.998\ atm}

n_2=\frac{{1.50}\times {294.85}\times 0.998}{3.75\times 301.25}\ mol

Solving for n₂ , we get:

n₂ = 0.39 mol

7 0
3 years ago
What are particles that are close together and locked in place??
Grace [21]
Particles that are close together and locked in a place means its
a solid
3 0
3 years ago
If an endothermic reaction occurs in solution, the temperature of the solution will
Ahat [919]

Answer:

increase

Explanation:

because in endothermic reaction heat is absorbed

4 0
3 years ago
Write electron configurations for Gallium, Ga (Z=31), and show the total valence electrons
ivann1987 [24]

<u>Answer:</u> The electronic configuration of gallium is written below and number of valence electrons is 3.

<u>Explanation:</u>

Electronic configuration is defined as the representation of electrons around the nucleus of an atom.

Number of electrons in an atom is determined by the atomic number of that atom.

Valence electrons are defined as the electrons present in the outermost shell of an atom.

We are given:

An element Gallium having atomic number as 31.

Number of electrons = 31

Electronic configuration of Gallium is: (Z=31):1s^22s^22p^63s^23p^64s^23d^{10}4p^1

This element has 3 electrons in its outermost shell. So, the number of valence electrons is 3

Hence, the electronic configuration of gallium is written below and number of valence electrons is 3.

3 0
3 years ago
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