Physics, 22.06.2019 21:30 Inrimid3619

Aperson touches a large chunk of ice with their hand and remarks, “this is making me cold.” explain what this person is feeling. is the ice transferring “cold” to the person? is there a heat transfer occurring? explain.

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Cold temperature can't "flow" into a warmer object, in this case, the person's hand. The heat energy of the hand gets transferred to the colder object, the ice.

Answer from: SkinnestXOXO

In this case ice is not transferring cold to the person but person is transferring heat to the ice.

Explanation:

A person touches a large chunk of ice with his hand at that time their is difference of temperature between person's hand and chunk of ice. Person's hand has higher temperature than chunk of ice.

We know that heat transfer from higher temperature to lower temperature. In this case also heat is transferred from person's hand to chunk of ice. In this way chunk of ice will start melting and man's hand start getting cold due to transfer of heat.

In this case ice is not transferring cold to the person but person is transferring heat to the ice.

Answer from: Quest

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

Answer from: Quest

To compare speeds speeds of wagons we will use second newton's law. it states: f = m * ahere we can see that force depends on the acceleration. if we know acceleration for both wagons we can compare them to make conclusion of speeds of wagons.we have: m1 = 10lbm2 = 20lbf1 = 2*f2also: m2 = 2*m1for bill we have equation: f1 = m1 * a1for tom we have equation: f2 = m2 * a2after inserting identities we have: 2*f2 =m1 * a1f2 = 2*m1 * a2in order to make conclusions about speeds we will solve these equations for a and find their ratio: a1 = 2f2 / m1a2 = f2 / 2m1a1 / a2 = (2f2/m1) / (f2/2m1)a1 / a2 = (2f2*2m1) / (m1*f2)a1 / a2 = (4f2m1) / (m1f2)a1 / a2 = 4this ratio is bigger than 1 and this means that a1 is greater than a2. a1 is 4 times greater than a2. speed of bill's wagon is 4 times greater than speed of tom's wagon.

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Aperson touches a large chunk of ice with their hand and remarks, “this is making me cold.” explain...

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