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2 years ago

8

what is the minimum heat if A 500cm³ of water is to be heated from a room temperature (28°C) to 100°C in order to prepare hot cu

p of coffee

1 answer:

mr Goodwill [35]2 years ago

7 0

I need my points my guy

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If a car increases its velocity from zero to 60 m/s in 10 seconds, its acceleration is A. 600 m/s2 B. 60 m/s2 C. 3 m/s2 D. 6 m/s

enot [183]

Answer:

a

Explanation:

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3 years ago

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Confirmation bias can affect our problem-solving abilities. <br> A. True <br> B. False

marusya05 [52]

The answer true I’m guessing. It’s a 50/50 chance

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2 years ago

Explain how a form of<br> energy is used in daily life

hram777 [196]

Answer:

When we talk about residential uses of energy, these are the most basic uses of energy . They include watching television, washing clothes, heating and lighting at home , taking a shower, working from home on your laptop or computer, running appliances and cooking.

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2 years ago

Susan is making an electromagnet in her science class today. First, she takes a nail and winds coils of copper wire around it th

matrenka [14]

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Electrical

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3 years ago

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A fairground ride consists of a large vertical drum that spins so

expeople1 [14]

Answer:

v = 3.84 m/s

Explanation:

In order for the riders to stay pinned against the inside of the drum the frictional force on them must be equal to the centripetal force:

$Centripetal\ Force = Frictional\ Force\\\\\frac{mv^2}{r} = \mu R = \mu W\\\\\frac{mv^2}{r} = \mu mg\\\\\frac{v^2}{r} = \mu g\\\\v = \sqrt{\mu gr}$

where,

v = minimum speed = ?

g = acceleration due to gravity = 9.81 m/s²

r = radius = 10 m

μ = coefficient of friction = 0.15

Therefore,

$v=\sqrt{(0.15)(9.81\ m/s^2)(10\ m)}$

<u>v = 3.84 m/s</u>

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2 years ago