PHYSICS HIGH SCHOOL

If 600 J of work is done in 3 s, what is the power? (Power: P = W/t)

Answers

Answer 1

Answer: P = W/t
= 600 / 3
Power = 200 Watt

Answer 2

Answer:

Answer: 200 W

Explanation:

In physics, power is defined as the amount of work done divided by the time taken to do that work:

$P=(W)/(t)$

where W is the work done and t is the time.

In this problem, the work done is W=600 J, while the time taken is t=3 s. Substituting into the formula, we find the power:

$P=(600 J)/(3 s)=200 W$

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True of false A millimeter I'd larger than a kilometer. So, these prefixes are listed in order of increasing size going from left to right
Which of the following is NOT true? a. The higher the moment of inertia, the greater the resistance to changes in angular velocity. b. The higher the moment of inertia, the slower something will roll down an incline. c. The lower the moment of inertia, the easier it is to change the angular velocity. d. The lower the moment of inertia, the slower something will roll down an incline.
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A current of 4A flows in a wire of resistance 60 ohm. calculate electrical energy consumed in 2 min.
Describe the factors that determine power in your own words (not from a website)

A swinging pendulum demonstrates what type of energy

Answers

The correct answer to the question is : Mechanical energy.

EXPLANATION:

Let us consider a pendulum which is raised to certain height. The energy possessed by the pendulum at this height is gravitational potential energy.

Let the pendulum is released. Now the potential energy of the pendulum is converted into kinetic energy. At the mean point, whole of its potential energy is converted into kinetic energy.

Due to inertia, the pendulum will overshoot its mean position and will move towards its extreme position. During its movement from mean point to extreme point, the kinetic energy is converted into potential energy. At extreme point, whole of its kinetic energy is converted into potential energy.

Hence, there is only energy conversion between kinetic energy and potential.

We know that sum total of kinetic energy and potential energy is called mechanical energy.

Hence, the correct answer is mechanical energy.

Potential and kinetic energy .

una granada de 4kg inicialmente en reposo,estalla en dos trozos,uno de los cuales ,de 2.5kg sale disparado hacia la derecha a 120m/s . Calcula la velocidad y el sentido del movimiento del segundo trozo.

Answers

according to google translate
reservation of momentum
momentum before = after

0 = momentum of piece to the right + 2nd one

0 = 2.5(120) + (4-2.5)v

v is negative so it moves to the left

Final answer:

La conservación de la momentum lineal dicta que la momentum total antes y después de la explosión de la granada debe ser la misma, o sea, cero. Teniendo en cuenta la dirección de cada trozo post-explosión, puedes resolver para hallar la velocidad del segundo trozo.

Explanation:

Este problema se resuelve usando las leyes de conservación de la momentum lineal, que dice que la momentum total de un sistema de partículas permanece constante siempre que no actúen fuerzas externas. En este caso, la granada explota en dos trozos, pero como la granada estaba inicialmente en reposo, la momentum total inicial sería cero. Así que, tras la explosión, la momentum total debe seguir siendo cero.

Puedes escribir la ley de conservación de la momentum para este ejemplo como sigue:

0 = momentum del trozo de 2.5 kg + momentum del trozo de 1.5 kg

Como sabemos, la momentum es el producto de la masa por la velocidad, así que para el trozo de 2.5 kg, la momentum sería 2.5 kg * 120 m/s que va a la derecha (puedes tomarlo como positiva). Luego, mujeres definir la velocidad del trozo de 1.5 kg como 'v', su momentum seria -1.5 kg * v (porque va a la izquierda, lo tomas como negativo).

Por ende,

0 = 2.5 kg * 120 m/s - 1.5 kg * v

De esta ecuación puedes resolver para 'v' y hallarás la velocidad del segundo trozo. Lo negativo indica que va a la izquierda.

Learn more about Conservación de la momentum lineal here:

brainly.com/question/32670451

#SPJ2

Only answer if you know all of themThe connections between neurons in the retina, specifically the connections referred to as “lateral inhibition,” help us see which of the following better?

AContrast
BFaces
CColors

Improving the contrast of an image (making the dark regions darker and the light regions lighter) helps us to identify:

AThe edges of objects
BThe center of objects
CThe color of an object

What assumption does our visual system make in order to see curved surfaces (domes, holes)?

ALight comes from above
BCurved surfaces are always evenly lit
CCurved surfaces are always easy to see, no assumptions are made

Which part of the face does our brain pay the most attention to?

AEyes and mouth
BEyes and ears
CEyes and chin

If all these assumptions sometimes lead to mistakes, for example in these optical illusions, why do we make them?

AIt helps us see things faster
BIt helps us see things correctly
CIt helps us pay attention to what's important
DAll of the above

Answers

1)
The connections between neurons in the retina, specifically the connections referred to as “lateral inhibition,” help us see which of the following better?

A) Contrast
B) Faces
C) Colors

2)
Improving the contrast of an image (making the dark regions darker and the light regions lighter) helps us to identify:

A) The edges of objects
B) The center of objects
C) The color of an object

3)
What assumption does our visual system make in order to see curved surfaces (domes, holes)?

A) Light comes from above
B) Curved surfaces are always evenly lit
C) Curved surfaces are always easy to see, no assumptions are made

4)
Which part of the face does our brain pay the most attention to?

A) Eyes and mouth
B) Eyes and ears
C) Eyes and chin

5)
If all these assumptions sometimes lead to mistakes, for example in these optical illusions, why do we make them?

A) It helps us see things faster
B) It helps us see things correctly
C) It helps us pay attention to what's important
D) All of the above

Hope that helps :)
*the correct answers are bolded, italicized, and underlined.*

What is one way that fission and fusion are similar?

Answers

Well, they both start chain reactions and they are also both used in certain nuclear bombs. Also they are both natural processes that occur in the sun, where hydrogen fuses with helium atoms and then they split by the process of fission.

Which substance—wood or steel—is the better conductor? A conductor is a material that requires very littleheat energy to experience a change in temperature. Explain your answer.

Answers

The better substance is steel because lightning hits iron more than wood

Steel because good conductors are made of metal and steel is metal.

What is the minimum total energy released whenan electron and its antiparticle (positron)
annihilate each other?
(1) 1.64 × 10^–13 J (3) 5.47 × 10^–22 J
(2) 8.20 × 10^–14 J (4) 2.73 × 10^–22 J