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Pachacha [2.7K]

3 years ago

7

With each bounce off the floor, a tennis ball loses 11% of its mechanical energy due to friction. When the ball is released from

a height of 3.4 m above the floor, what height will it reach after the third bounce?
240 mm

240 cm

24 cm

270 cm

1 answer:

Reika [66]3 years ago

3 0

Answer:

240 cm

Explanation:

Gradpoint

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It kinda melted I think

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Se tienen 500g de alcohol etílico a una temperatura de -40 °C ¿Cuánto calor se necesita para transformarlo a vapor a una tempera

Feliz [49]

The question is: You have 500g of ethyl alcohol at a temperature of -40 ° C. How much heat is needed to transform it into steam at a temperature of 150ºC?

Answer: 233700 J heat is needed to transform ethyl alcohol into steam at a temperature of $-40^{o}C$ to $150^{o}C$ .

Explanation:

Given: Mass = 500 g

Initial temperature = $-40^{o}C$

Final temperature = $150^{o}C$

The standard value of specific heat of ethyl alcohol is $2.46 J/g ^{o}C$ .

Formula used to calculate the heat energy is as follows.

$q = m \times C \times (T_{2} - T_{1})$

where,

q = heat energy

m = mass of substance

C = specific heat

$T_{1}$ = initial temperature

$T_{2}$ = final temperature

Substitute the values into above formula as follows.

$q = m \times C \times (T_{2} - T_{1})\\= 500 g \times 2.46 J/g^{o}C \times [150 - (-40)]^{o}C\\= 233700 J$

Thus, we can conclude that 233700 J heat is needed to transform ethyl alcohol into steam at a temperature of $-40^{o}C$ to $150^{o}C$ .

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What is NOT a major factor affecting climate?

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B Longitude

Explanation:

The line of longitude or longitude does not affects climates.

Climate is the weather condition over a place for a long period of time. It usually takes several years to delineate the climate of an area.

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All lines of longitude are all great circles.
Latitude are lines from north to south on the earth surface. Only the equator is a great circle.
Latitude affects climate. In fact based on the division of lines of latitude on can predict climatic patterns on earth.
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Answer:

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So the system moment of inertia when she's at the rim is:

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irina1246 [14]

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