In what way is a piano an example of a quantized system?

1 answer:

7 0

When you play a piano, your energy increases in a uniform, continuous manner and is therefore quantized.When you play a piano, you can press only on individual keys, so that your energy is restricted to certain values and is therefore quantized.

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2. As a pendulum swings, its energy is constantly converted between kinetic

Alex

Answer:

at point F

Explanation:

To know the point in which the pendulum has the greatest potential energy you can assume that the zero reference of the gravitational energy (it is mandatory to define it) is at the bottom of the pendulum.

Then, when the pendulum reaches it maximum height in its motion the gravitational potential energy is

U = mgh

m: mass of the pendulum

g: gravitational constant

The greatest value is obtained when the pendulum reaches y=h

Furthermore, at this point the pendulum stops to come back in ts motion and then the speed is zero, and so, the kinetic energy (K=1/mv^2=0).

A) answer, at point F

6 0

3 years ago

The process of conversion of solid into gas and again gas into solid is known as

pantera1 [17]

Sublimation is when a solid becomes a gas. And gas to solid is deposition.

6 0

3 years ago

1. What are the things needed by plants to make their own food?

iren2701 [21]

Answer:

1-D(carbon dioxide, water and sunlight)

2-D(parasitism)

3-C(competition)

Explanation:

hope it helps

4 0

3 years ago

if an object is falling on earth at a terminal velocity of 140 km/hr, does that mean that the acceleration is ZERO?

Simora [160]

If he's falling in a straight line and his speed is not changing, that tells you that his acceleration is zero.

And THAT tells you that the forces on him are balanced, the net force acting on him is zero, and his motion is the same as it would be if there were NO force acting on him.

7 0

4 years ago

Measurements show that the enthalpy of a mixture of gaseous reactants decreases by during a certain chemical reaction, which is

snow_tiger [21]

The given question is incomplete. The complete question is as follows.

Measurements show that the enthalpy of a mixture of gaseous reactants decreases by 338 kJ during a certain chemical reaction, which is carried out at a constant pressure. Furthermore, by carefully monitoring the volume change it is determined that 187 kJ of work is done on the mixture during the reaction. Calculate the change in energy of the gas mixture during the reaction. Be sure your answer has the correct number of significant digits. Is the reaction exothermic or endothermic ?

Explanation:

The given data is as follows.

Change in enthalpy ( $\Delta H$ ) = -338 kJ (as it is a decrease)