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Vladimir [108]
3 years ago
13

30 points if you ask in 5 minutes

Physics
1 answer:
vfiekz [6]3 years ago
5 0

Perpetual motion is motion of bodies that continues indefinitely. A perpetual motion machine is a hypothetical machine that can do work indefinitely without an energy source. This kind of machine is impossible, as it would violate the first or second law of thermodynamics.

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6)
tiny-mole [99]

Answer: 14.5 N

Explanation:   NEED SCRATCH PAPER: A flower pot weighing 42.0 N (newtons) is hung above a window by three ropes, each making an angle of 15.0 degrees with the vertical. What is the tension in each rope supporting the flower pot?

✓ 14.5 N

found it on the internet?

5 0
3 years ago
An object is thrown horizontally off of a cliff. While falling, what happens to the horizontal acceleration?
irga5000 [103]

There is no acceleration in the horizontal direction because the speed in that direction is constant. So it stays at zero.

8 0
3 years ago
In the formulas for latent heat of fusion and latent heat of vaporization, what does Q represent?
Leto [7]

Answer:

the amount of heat of energy released or absorbed by a substance.

Explanation:

Mathematically, latent heat of fusion is given by the formula;

Q = mL

Where;

Q is the quantity of heat energy measured in Joules.

m is the mass measured in kilograms.

L is the specific heat latent heat of fusion.

In the formulas for latent heat of fusion and latent heat of vaporization, Q represents the amount of heat of energy released or absorbed by a substance.

In the process of heat conduction, thermal energy is usually transferred from fast moving particles to slow moving particles during the collision of these particles. Also, thermal energy is typically transferred between objects that has different degrees of temperature and materials (particles) that are directly in contact with each other but differ in their ability to accept or give up electrons.

3 0
3 years ago
Si las velocidades del viento y un avión tienen la
r-ruslan [8.4K]

Answer: Viendo que los aviones viajan muy raramente exactamente en la misma dirección que el para compensar continuamente tanto la dirección como la velocidad del vientoLos vientos en contra significa exactamente lo contrario; se necesita más combustible y el vuelo llevará más tiempo condiciones secas y húmedas, pero el piloto tiene la decisión final sobre si.

7 0
3 years ago
Un montañero de 65kg de masa ha ascendido a la cima del Everest, la montaña más alta del mundo de 8848m de altura sobre el nivel
andrew-mc [135]

Answer:

El trabajo realizado para subir los últimos 500 metros es 318727,5 joules.

Explanation:

Por la definición de trabajo sabemos que el montañero debió contrarrestar trabajo causado por la gravedad terrestre. Si asumimos que el cambio de la altura es muy pequeño en comparación con el radio del planeta (6371 kilómetros vs. 0,5 kilómetros), entonces podemos considerar que la aceleración gravitacional es constante y la ecuación de trabajo (\Delta W), medido en joules, que reducida a:

\Delta W = m\cdot g\cdot \Delta z (1)

Donde:

m - Masa del montañero, medido en kilogramos.

g - Aceleración gravitacional, medida en metros por segundo al cuadrado.

\Delta z - Distancia vertical de ascenso del montañero, medida en metros.

Si tenemos que m = 65\,kg, g = 9,807\,\frac{m}{s^{2}} y \Delta z = 500\,m, entonces el trabajo realizado por el montañero para subir es:

\Delta W = (65\,kg)\cdot \left(9,807\,\frac{m}{s^{2}} \right)\cdot (500\,m)

\Delta W = 318727,5\,J

El trabajo realizado para subir los últimos 500 metros es 318727,5 joules.

7 0
3 years ago
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