3 years ago

A 1430 kg car speeds up from 7.5 m/s to 11 m/s in 9.3 s. Ignoring friction, how much power did that require?

Physics

1 answer:

katrin [286]3 years ago

8 0

Hope it helped you.

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If a person believes that dreams have hidden meaning he or she would agree with Freud's ideas about _ content

uysha [10]

A.lucid because it makes more sense yo the answer how about you do it yourself

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3 years ago

a mass of 1.00 kg of water at temperature T is poured from a height of 0.100 km into a vessel containing water of the same tempe

Mariana [72]

Answer:

1.34352 kg

Explanation:

$m_w$ = Mass of water falling = 1 kg

h = Height of fall = 0.1 km

$\Delta T$ = Change in temperature = 0.1

c = Specific heat of water = 4186 J/kg K

g = Acceleration due to gravity = 9.81 m/s²

$m_v$ = Mass of water in the vessel

Here the potential energy will balance the internal energy

$m_wgh=m_wc\Delta T+m_vc\Delta T\\\Rightarrow m_v=\dfrac{m_wgh-m_wc\Delta T}{c\Delta T}\\\Rightarrow m_v=\dfrac{m_wgh}{c\Delta T}-m_w\\\Rightarrow m_v=\dfrac{1\times 9.81\times 100}{4186\times 0.1}-1\\\Rightarrow m_v=1.34352\ kg$

Mass of the water in the vessel is 1.34352 kg

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3 years ago

A physical science test book has a mass of 2.2kg. . What is the weight on the earth

dem82 [27]

Weight = mg, g ≈ 9.8 m/s²

Weight = 2.2 * 9.8 ≈ 21.56 N

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4 years ago

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From the 1780s to the late 1800s, people thought the amount of land and resources in the West was limited

Sonbull [250]

Answer:true

Explanation:

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3 years ago

Braddy connected the loose wire to the battery and created an electromagnet. He picked up 45 thumb tacks with his electromagnet,

Katarina [22]

Answer:

C) Use two batteries instead of one.

Explanation:

-Strength of an electromagnet depends on the electrical current which flows through the wires.

-Two batteries have a higher current than one and thus higher strength in the electromagnet.

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3 years ago