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Alexandra [31]
4 years ago
12

PLEASEEE HELP ME WITH THIS ALSO. I DONT WANT TO FAIL. You push a merry-go-round on which Kim and Katie are riding. Kim weighs 45

kg and Katie weighs 36 kg, while the merry-go-round weighs 163 kg. The merry-go-round leaves your hand with an acceleration of 40 m/s2. What size force was applied?
Physics
1 answer:
Serjik [45]4 years ago
5 0

Answer:

The body weight

Explanation:

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A 33.0 g iron rod, initially at 22.7 ∘c, is submerged into an unknown mass of water at 63.3 ∘c, in an insulated container. the f
professor190 [17]
When the iron and the water reach thermal equilibrium, they have same temperature, T=58.5^{\circ}C.
We can consider this as an isolated system, so the heat released by the water is equal to the heat absorbed by the iron.

The hear released by the water is:
Q_w =m_w C_{sw} \Delta T_w
where m_w is the water mass, C_{sw}=4.186 J/(g^{\circ}C) is the specific heat of the water, and \Delta T_w = 63.6^{\circ}-58.5^{\circ}=5.1^{\circ}C is the variation of temperature of the water.

Similarly, the heat absorbed by the iron is:
Q_i = m_i C_{si} \Delta T_i
where m_i = 33.0 g is the iron mass, C_{si}=0.444 J/(g^{\circ}C) is the iron specific heat, and \Delta T_i = 58.5^{\circ}-22.7^{\circ}=35.8^{\circ}C is the variation of temperature of the iron.

Writing Q_w=Q_i and replacing the numbers, we can solve to find mw, the mass of the water:
m_w= \frac{m_i C_{si} \Delta T_i}{C_{sw} \Delta T_w} =24.6 g
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3 years ago
What is her mass pls help
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Answer:

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Explanation:

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What is the main source of fuel for cellular respiration?
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The primary source of fuel for cellular is glucose, but oxygen is also utilized. Hope this helps! :)
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12. The Copernican model of the universe was supported by A. Brahe and Kepler. B. Ptolemy and Brahe. C. Kepler and Einstein. D.
Rom4ik [11]

Answer:

A. Brahe and Kepler

Explanation:

The Copernican model was a heliocentric model of the universe. Copernicus thought that the Sun is stationary, and the Earth and the other planets are orbiting around it. He also noted that the stars are further away from the Sun compared to the distance between the Earth and the Sun. Three very important hings in his theory are that he thought that the Earth rotates around its own axis, revolves around the Sun, and has annual tilting of its axis. At some things, Copernicus was right with his theory, at some he wasn't, but anyway he made one giant step forward in the understanding of the universe. His theory was supported by many, though mostly after his death, with one of the most noticeable supporters of him being Ticho Brache and Kepler who made model of his theory, as well as improving it.

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Scientists use models of volcanoes to...
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Scientists use models of volcanoes to , Determine their intensity.
So the answer is B.
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