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Katen [24]
3 years ago
11

Mrs. Perez added a room temperature copper cube and an aluminum cube she just removed from the freezer to a beaker of boiling wa

ter. She left thw cubes in the water for three hours. Which of the following describes a heat flow tha took place during those three hours?
A. From the aluminum cube to the beaker.
B. From the copper cube to the boiling water.
C. From the aluminum cube to the copper cube.
D. From the bolling water to the aluminum cube.​
Physics
1 answer:
faust18 [17]3 years ago
5 0
I think the answer is A
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A 1000-kg car is traveling north at 20.0 m/s. A 1500-kg car is traveling north at 36.0 m/s. The 1500-kg collides with the rear o
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B

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The 0.100 kg sphere in (Figure 1) is released from rest at the position shown in the sketch, with its center 0.400 m from the ce
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the speed of 0.10 sphere when it is moved to 0.20 kg  to the left is :   3.3337*10^{-5} \ m/s

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U= -(\frac{ Gm_1m_2 }{r_2} - \frac{ Gm_1m_2 }{r_1}) \\ \\ U=Gm_1m_2 (\frac{ 1 }{r_2} - \frac{ 1 }{r_1})

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the change in the gravitational potential energy  when the sphere exerts just 5 kg mass is ;

U_2=Gm_1m_2 (\frac{ 1 }{r_2} - \frac{ 1 }{r_1})

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U_{total } = U_1 +U_2

U_{total} = 2.778*10^{-11} + (-8.335*10^{-11})

U_{total} = -5.557*10^{-11}

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K.E =  5.557*10^{-11}

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v^2 = \frac{2*5.557*10^{-11} \ J}{m_1}

v=\sqrt{ \frac{2*5.557*10^{-11} \ J}{0. 1 \kg}

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Thus, the speed of 0.10 sphere when it is moved to 0.20 kg  to the left is :   3.3337*10^{-5} \ m/s

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