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3 years ago

What does the potential energy and kinetic energy of an object depend on ?

Physics

1 answer:

alexdok [17]3 years ago

4 0

Answer:

Both, potential energy and kinetic energy depends on mass. The higher the mass, the higher the energy. However, the difference is that potential energy depends on vertical height whereas kinetic energy depends on the velocity.

Explanation:

From the formula we can see that;

Potential Energy = mass* gravitational acceleration *vertical height.

Kinetic Energy = 0.5 * mass * (velocity)^2

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A small 18 kilogram canoe is floating downriver at a speed of 1 m/s. What is the canoe's kinetic energy?

In-s [12.5K]

Kinetic energy = (1/2) (mass) (speed²).

A Physicist in the canoe, or on a raft floating downriver next to the canoe, will say that the canoe's kinetic energy is zero.

A Physicist on the riverbank, watching the canoe drift by at 1 m/s, will say that its kinetic energy is 9 Joules.

They're both correct.

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3 years ago

An airtight box has a removable lid of area 1.00 10-2 m2 and negligible weight. the box is taken up a mountain where the air pre

gladu [14]

<span>9.50x10^2 newtons A pascal is defined as 1 newton per square meter. So let's multiply the pressure by the surface area of the box lid. F = 1.00x10^-2 m^2 * 9.50x10^4 N/m^2 = 9.50x10^2 N So it will take 9.50x10^2 newtons of force to remove the lid from the box.</span>

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3 years ago

SCALCET8 3.9.018.MI. A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the

Firlakuza [10]

Answer:

The length of his shadow is decreasing at a rate of 1.13 m/s

Explanation:

The ray of light hitting the ground forms a right angled triangle of height H, which is the height of the building and width, D which is the distance of the tip of the shadow from the building.

Also, the height of the man, h which is parallel to H forms a right-angled triangle of width, L which is the length of the shadow.

By similar triangles,

H/D = h/L

L = hD/H

Also, when the man is 4 m from the building, the length of his shadow is L = D - 4

So, D - 4 = hD/H

H(D - 4) = hD

H = hD/(D - 4)

Since h = 2 m and D = 12 m,

H = 2 m × 12 m/(12 m - 4 m)

H = 24 m²/8 m

H = 3 m

Since L = hD/H

and h and H are constant, differentiating L with respect to time, we have

dL/dt = d(hD/H)/dt

dL/dt = h(dD/dt)/H

Now dD/dt = velocity(speed) of man = -1.7 m/s ( negative since he is moving towards the building in the negative x - direction)

Since h = 2 m and H = 3 m,

dL/dt = h(dD/dt)/H

dL/dt = 2 m(-1.7 m/s)/3 m

dL/dt = -3.4/3 m/s

dL/dt = -1.13 m/s

So, the length of his shadow is decreasing at a rate of 1.13 m/s

5 0

2 years ago

Assoli18 [71]

Answer: 40.4M/s

Solution: 46.6/1.15 = 40.4347826 then round it to a single decimal point, since 3 is lower than 5 it will be rounded to 40.4

8 0

2 years ago

“instrucciones” para hacer los diagramas de Lewis de un compuesto iónico y luego para uno covalente. ¿En qué se diferencian y en

Mazyrski [523]

Answer:

- Se diferencian en que en los compuestos iónicos se ceden y aceptan electrones, mientras que en los covalentes de comparten.

- Se parecen en que los enlaces son formados por medio de los electrones de valencia y que en ambos compuestos la ley del octeto se debe cumplir.

Explanation:

¡Hola!

En este caso, debemos recordar que los compuestos iónicos se dan cuando se forman enlaces iónicos en los que el elemento más electronegativo tiene la capacidad de aceptar los electrones perdidos por el elemento menos electronegativo con el fin de cumplir la ley del octeto en la que 8 electrones deben ser exhibidos en la molécula. Por otro lado, los compuestos covalentes se forman cuando los átomos comparten sus electrones de valencia con el fin de alcanzar la ley del octeto.

De este modo encontramos que se diferencian en que en los compuestos iónicos se ceden y aceptan electrones, mientras que en los covalentes de comparten.

Por otro lado, ambos se parecen en que los enlaces son formados por medio de los electrones de valencia y que en ambos compuestos la ley del octeto se debe cumplir.

¡Saludos!

6 0

3 years ago