Describe the factors that determine power in your own words (not from a website)

Answers

Answer 1

Answer:

As it was categorized in the physics category it must be the mechanical power.

Power is basically the amount of work done per unit time or in simpler words the amount of energy transferred per unit time.

The SI unit for power is Watt. Which is basically J/s or Nm/s as wor has the unit of Nm.

In electrical components power can also be categorized as the amount voltage supplied multiplied by the current passed through the component.

Answer 2

Answer:
Since you put your question in the <Physics> category, I'll assume
you're talking about mechanical or electrical power, and not political
or military power etc.

Power is the rate of doing work or moving energy from one place
to another.

In mechanical contraptions, Work is (force) x (distance) ,
so
   Power = (work) divided by (time)

   or    = (force) x (distance) divided by (time).

In electrical circuits,

   Power = (voltage) x (current)

   or = (current)² x (resistance)

   or = (voltage)² divided by (resistance) .

(Just use the formula with whatever quantities you know.)

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How much heat energy must be added to 52kg Of water at 68°F to raise the temperature to 212°F? The specific heat capacity for water is 4.186×10 to the third power J/kg times degrees Celsius

Answers

Answer:

The amount of energy added to rise the temperature Q = 17413.76 KJ

Explanation:

Mass of water = 52 kg

Initial temperature $T_(1)$ = 68 °F = 20° c

Final temperature $T_(2)$ = 212 °F = 100° c

Specific heat of water $C = 4.186 (KJ)/(kg c)$

Now heat transfer Q = m × C × ( $T_(2)$ - $T_(1)$ )

⇒ Q = 52 × 4.186 × ( 100 - 20 )

⇒ Q = 17413.76 KJ

This is the amount of energy added to rise the temperature.

What distinguishes a tornado watch from a tornado warning?

Answers

"Watch" . . . atmospheric conditions exist that could
produce tornados, but none have been seen yet.

"Warning" . . . tornados have formed and have been seen.

A 0.100-kilogram apple falls from a height of 1.50 meters to 1.00 meters. Ignoring frictional effects, what is the kinetic energy of the apple at this height?

Answers

Answer:

The kinetic energy of the apple at this height is 0.49 J.

Explanation:

Mass of apple, m = 0.1 kg

It falls form a height of 1.5 meters to 1 meters. We need to find the kinetic energy of the apple at this height. As the apple is falling, the decrease in potential energy is equal to the increase in kinetic energy. Using the conservation of energy as :

$E_k=-\Delta E_p$

$E_k=-mg\Delta h$

$E_k=-0.1* 9.8* (1-1.5)$

$E_k=0.49\ J$

So, the kinetic energy of the apple at this height is 0.49 J. Hence, this is the required solution.

before the fall, at 1.50 m, all the energy is potential and none is kinetic.

As it's falling the apple has both kinetic and potential energies. The decrease in potential energy is equal to the increase in kinetic energy

KE = -ΔPE
= -mgΔh
= -(0.100 kg)(9.81 m/s²)(1.00 m - 1.50 m)
= 0.491 J

If the truck has a mass of 2,000 kilograms, what is its momentum? Express your answer in kg·m/sec.

Answers

You don't tell us its speed. If that's the full question and there is no indication of a speed, the answer is 0kg.m/s as it has no momentum

Wait but u don't mention speed, so there's no momentum

Describe two reasons why an alpha particle is less penetrating than a beta or gamma particle.

Answers

Alpha particles travel through the air they collide with oxygen and nitrogen molecules. While they collide with these molecules, they lose some energy until all energy are used up and they are absorbed. These particles can be absorbed by a sheet of paper or by the air. On the other hand, beta particles and gamma particles move faster than the alpha particles and are poor at ionizing atoms or molecules thus it takes more of the material to be able to absorb these particles.

Answer:

1. Heavy mass

2. greater charge

Explanation:

An alpha particle has two protons and two neutrons. It has +2 e charge. It is a heavy mass particle. Thus, when it tends to penetrate even a thin sheet, it loses its energy very quickly because of its interaction with the material particles.

Beta particle is a high energy electron or positron. It carries 1 unit charge and has very less mass in comparison to an alpha particle. Thus, it has more penetrating power than alpha particle.

A gamma particle is charge less and mass less highly energetic particle. Thus, it has highest penetrating power.

Light travels 300,000,000 m/s, and one year has approximately 32,000,000 seconds. A light year is the distance light travels in one year. State this distance in centimeters.

Answers

   (3 x 10⁸ meter/sec) x (100 cm/meter) x (3.2 x 10⁷ sec/year)

   = (3 x 10⁸ x 100 x 3.2 x 10⁷) (meter-cm-sec) / (sec-meter-yr)

   = ( 9.6 x 10¹⁷    ) ( cm/yr )

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