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Andrews [41]
4 years ago
5

A boy and his younger sister are at the zoo on a hot day. They each buy a cold lemonade. The boy buys a large lemonade, and his

sister buys a small. They set their cups on a hot table and wait a while before they start drinking. When they finally begin to drink their lemonade, the girl complains that her drink is no longer cold. However, the brother states that his larger drink is still cold.
What conclusions could the boy and girl accurately draw from their observations? Choose the two that apply.

Question options:

A If there are two different amounts of the same liquid, the temperature is a good way to compare their thermal energies.


B The particles in the warmer cup of lemonade have more kinetic energy than the particles in the colder cup of lemonade.


C Energy from the hot table and warm air is transferred to the cold cups of lemonade.


D The thermal energy of a liquid is the same regardless of
Physics
1 answer:
FromTheMoon [43]4 years ago
7 0

Answer: A and C (i took the test)

Explanation: Hope this helps:)

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If two children, with masses of 16 kg and 24 kg , sit in seats opposite one another, what is the moment of inertia about the rot
Elena-2011 [213]

Answer:

The moment of inertia about the rotation axis is 117.45 kg-m²

Explanation:

Given that,

Mass of one child = 16 kg

Mass of second child = 24 kg

Suppose a playground toy has two seats, each 6.1 kg, attached to very light rods of length r = 1.5 m.

We need to calculate the moment of inertia

Using formula of moment of inertia

I=I_{1}+I_{2}

I=(m+m_{1})\times r^2+(m+m_{2})\times r^2

m = mass of seat

m₁ =mass of one child

m₂ = mass of second child

r = radius of rod

Put the value into the formula

I=(16+6.1)\times(1.5)^2+(24+6.1)\times(1.5)^2

I=117.45\ kg-m^2

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8 0
3 years ago
This chemical equation represents a ______________ reaction.
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A car with a mass of 710 kg is traveling at 37 km/hr. It accelerates to a speed of 120 km/hr in 12.6 seconds. What is the net fo
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Answer: The net force acting on the car 1,299.3 N.

Explanation:

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Final velocity of the car,v = 120 km/h = 33.33 m/s

time taken b y car = 12.6 sec

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The net force acting on the car 1,299.3 N.

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