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8_murik_8 [283]
3 years ago
5

Heat always flows from a _________ object to a __________ one.

Physics
2 answers:
PolarNik [594]3 years ago
8 0

From a hot object to a cold object. Ill give an example as to why:

Say you place an ice cube in a glass of warm water, we know that in colder substances, the average kinetic energy per particle (which is the classical definition for temperature is lower). In hotter substances the average kinetic energy per particle is larger, as it is hotter. So now the ice is placed in the warm water. The fast moving particles within the water, that have higher kinetic energies will bounce off the slower moving particles in the ice with lower average kinetic energies. This causes an exchange in energy as the substance with more average kinetic energy per particle (which is temperature) will transfer energy to the slower moving particles located in the ice. This will eventually cause the water and ice to reach an equilibrium temperature as a result of the exchange, with the energy taken to melt the ice included.

satela [25.4K]3 years ago
6 0

Heat always flows from a B. hotter object to a colder one.

Heat transfers always from hotter to colder.

~

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-- If it has no vertical speed when it started, then at the end
of 3 seconds, its speed is

                         =       (0)            + (9.8 m/s²  x  3 sec)

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6 0
3 years ago
The main difference between obsessive-compulsive personality disorder (OCPD) and obsessive-compulsive disorder (OCD) is that ___
maksim [4K]

Answer:

B. people with OCD know their disorder is irrational

Explanation:

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6 0
2 years ago
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For spring break you are traveling to San Diego. The trip is 1,746.4 miles and the trip takes 20.1 hours. How fast will you be t
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Answer:

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7 0
2 years ago
Two astronauts, each with a mass of 50 kg, are connected by a 7 m massless rope. Initially they are rotating around their center
kiruha [24]

Answer:

The angular  velocity is w_f =  1.531 \ rad/ s

Explanation:

From the question we are told that

     The mass of each astronauts is  m =  50 \ kg

      The initial  distance between the two  astronauts  d_i  =  7 \  m

Generally the radius is mathematically represented as r_i  =  \frac{d_i}{2} = \frac{7}{2}  =  3.5 \  m

      The initial  angular velocity is  w_1 = 0.5 \  rad /s

       The  distance between the two astronauts after the rope is pulled is d_f =  4 \  m

Generally the radius is mathematically represented as r_f  =  \frac{d_f}{2} = \frac{4}{2}  =  2\  m

Generally from the law of angular momentum conservation we have that

           I_{k_1} w_{k_1}+ I_{p_1} w_{p_1} = I_{k_2} w_{k_2}+ I_{p_2} w_{p_2}

Here I_{k_1 } is the initial moment of inertia of the first astronauts which is equal to I_{p_1} the initial moment of inertia of the second astronauts  So

      I_{k_1} = I_{p_1 } =  m *  r_i^2

Also   w_{k_1 } is the initial angular velocity of the first astronauts which is equal to w_{p_1} the initial angular velocity of the second astronauts  So

      w_{k_1} =w_{p_1 } = w_1

Here I_{k_2 } is the final moment of inertia of the first astronauts which is equal to I_{p_2} the final moment of inertia of the second astronauts  So

      I_{k_2} = I_{p_2} =  m *  r_f^2

Also   w_{k_2 } is the final angular velocity of the first astronauts which is equal to w_{p_2} the  final angular velocity of the second astronauts  So

      w_{k_2} =w_{p_2 } = w_2

So

      mr_i^2 w_1 + mr_i^2 w_1 = mr_f^2 w_2 + mr_f^2 w_2

=>   2 mr_i^2 w_1 = 2 mr_f^2 w_2

=>   w_f =  \frac{2 * m * r_i^2 w_1}{2 * m *  r_f^2 }

=>    w_f =  \frac{3.5^2 *  0.5}{  2^2 }

=>   w_f =  1.531 \ rad/ s

       

3 0
2 years ago
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The correct answer is:

Newton’s laws can explain the forces that occur between objects every day


3 0
3 years ago
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