3 years ago

Explain which planets have seasons and why some planets have none at all.

1 answer:

8 0

Answer:

Some planets have seasons some don't bc of the distance from the sun some of them are too cold or too hot to have seasons

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bA cylinder is submerged in water as illustrated in the diagram. Which of the following statements is true? The pressure at B is

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Question: A cylinder is submerged in water as illustrated in the diagram. Which of the following statements is true?

Answer: The pressure at D is less than at B.

Explanation: this is because B has less amount of pressure and D has a lot more pressure weighing it down and B has less pressure

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To make them gas, you have to give liquids yes or no?

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Yes

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Runaway truck ramps are common on mountainous highways in case the brakes fail on large trucks. If a

dusya [7]

Answer:

$W=-21,870,000\ J$

Explanation:

<u>Work and Kinetic Energy </u>

The work an object does due to its motion is equal to the change of its kinetic energy. Being ko and k1 the initial and final kinetic energy respectively and m the mass of the object, then

$W=\Delta k=k_1-k_0$

Since

$\displaystyle k=\frac{mv^2}{2}$

We have

$\displaystyle W=\frac{mv_1^2}{2}-\frac{mv_0^2}{2}$

The truck has a mass of 60,000 kg and is moving at 27 m/s. The runaway truck ramp must stop the truck, so the final speed is 0. Thus

$\displaystyle W=\frac{(60,000)0^2}{2}-\frac{(60,000)(27)^2}{2}$

$W=0-21870000\ J$

$\boxed{W=-21,870,000\ J}$

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3 years ago

Distance meters Time (seconds) Trial Tria 2 Trials Average 3 053 059 0.52 055 6 106 719 104 Uning the values trom the data table

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Jsisisusuagahannananana this is worth 22 points g that’s crazy 25

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2 years ago

What’s the velocity of a sound wave traveling through air at a temperature of 18°C (64.4°F)?

Anna11 [10]

Answer:

342 m/s

Explanation:

The velocity of sound in air is approximated as:

v ≈ 331.4 + 0.6 T

where v is the velocity in m/s and T is the temperature in Celsius.

At T = 18:

v ≈ 331.4 + 0.6 (18)

v ≈ 342.2

The velocity is approximately 342 m/s.

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