Help me with Economics please and thank you the question is going to be down in a attached file while the answers on here

Physics

2 answers:

Tresset [83]2 years ago

6 0

I think is A or B it depends on like what the trying to answer

Usimov [2.4K]2 years ago

6 0

zoooooooooooooom i am here

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Power can be defined as

maria [59]

I think it’s D sorry If I’m wrong

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2 years ago

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a 230 kg roller coaster reaches the top of the steepest hill with a speed of 6.2 km/h. It then descends the hill, which is at an

igor_vitrenko [27]

Answer: 81.619 kJ

Explanation:

Given

Mass of roller coaster is $m=230\ kg$

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Hill to bottom is 51 m long with inclination of $45^{\circ}$

Height of the hill is $h=51\sin 45^{\circ}=36.06\ m$

Conserving energy to get kinetic energy at bottom

Energy at top=Energy at bottom

$\Rightarrow K_t+U_t=K_b+U_b\\\Rightarrow \dfrac{1}{2}mu^2+mgh=K_b+0\\\\\Rightarrow K_b=0.5\times 230\times 1.72^2+230\times 9.8\times 36.06\\\Rightarrow K_b=340.216+81,279.24\\\Rightarrow K_b=81,619.456\ J\\\Rightarrow K_b=81.619\ kJ$

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2 years ago

Science is the process of pursuing knowledge?

tatyana61 [14]

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3 years ago

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A crane raises a crate with a mass of 150 kg to a height of 20 m. Given that

Virty [35]

Answer:

$\boxed {\boxed {\sf 29,400 \ Joules}}$

Explanation:

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$E_P= m \times g \times h$

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