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Romashka-Z-Leto [24]

3 years ago

13

A car is moving with a speed of 15

1 answer:

mars1129 [50]3 years ago

5 0

The unit for the speed was not given

If speed is 15km/h
and distance is 1.2km
Then using the formula
Speed = distance/time
Time = t
15 = 1.2/t
15t = 1.2
t = 1.2/15
t = 0.08hrs

But
1hr = 60seconds
0.08hrs = t
t = 60(0.08)
t = 4.8s

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In what different ways can be sound heard

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The question is a bit ambiguous, but sound can be heard at different frequencies and amplitudes.

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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 = $150^{o}C$

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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.

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

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IgorLugansk [536]

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v = λ f

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f = v / 4L

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3 years ago

A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from zero to 9.41 m

Svetach [21]

Answer:

the impulse experienced by the passenger is 630.47 kg

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