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Gennadij [26K]
3 years ago
9

Why does a skateboard on top of a ramp have potential energy.

Mathematics
1 answer:
saveliy_v [14]3 years ago
3 0

Answer:

Conservation of Energy

Step-by-step explanation:

This is because of friction which changes kinetic energy into heat. ... When a skater is at the top of the ramp he has the highest amount of potential energy. Kinetic energy is the energy of motion. The faster the skater moves the more kinetic energy he has.

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your answer is
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The cost of cementing 30 m² of floor area is $810. How much will it
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Answer:

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Step-by-step explanation:

27 per m^2 so 27 times 55 = 1485 m^2

6 0
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2.- Supóngase que los diámetros de los tornillos fabricados por una compañía están distribuidos normalmente con una media de 0.2
Sergio [31]

Answer:

7.30167%

Step-by-step explanation:

Usando la fórmula de puntuación z

z = (x-μ) / σ, donde x es la puntuación bruta, μ es la media de la población y σ es la desviación estándar de la población

Para x <0.20 pulgadas

z = 0.20 - 0.25 / 0.02

z = -2.5

Valor de probabilidad de Z-Table:

P (x <0.20) = 0.0062097

Para x> 0.28 pulgadas

z = 0.28 - 0.20 / 0.02

z = 1.5

Valor de probabilidad de Z-Table:

P (x <0.28) = 0.93319

P (x> 0.28) = 1 - P (x <0.28) = 0.066807

La probabilidad de que se produzcan tornillos defectuosos cuando el tornillo se considera defectuoso si su diámetro es inferior a 0.20 pulgadas o superior a 0.28 pulgadas es

P (x <0.20) + P (x> 0.28)

= 0.0062097 + 0.066807

= 0.0730167

Conversión a porcentaje

= 0.0730167 × 100

= 7.30167%

El porcentaje de tornillos defectuosos producidos es

7.30167%

3 0
3 years ago
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5 0
3 years ago
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Mrs. McClure's famous peanut butter cookies call for 1 cup of peanut butter for every 1 2 of a cup of oil. Today, she wants to m
bezimeni [28]

Answer:

Amount of butter need for 1 cup of oil = 2 cup of butter

Step-by-step explanation:

Given:

Amount of butter need for 1/2 cup of oil = 1 cup

Find:

Amount of butter need for 1 cup of oil

Computation:

Amount of butter need for 1/2 cup of oil = 1 cup

1 cup butter = 1/2 cup oil

So,

Amount of butter need for 1 cup of oil = 1 / [1/2]

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Amount of butter need for 1 cup of oil = 2 cup of butter

6 0
3 years ago
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