/FINAL.pdf 3. A lead bullet of mass m = 10.0 g is travelling with a velocity of vo = 100 m/s when it strikes a wooden block. The block has a mass of M = 1.00 kg and is at rest on the table, as shown in the diagram below. The bullet embeds itself in the block and after the impact they slide together. All the kinetic energy that is lost in the collision is converted into heat. Assume that all this heat goes into heating up the bullet. (a) What is the speed of the wooden block after the collision? (b) How much heat is generated as a result of the collision? (c) By how many degrees does the temperature of the bullet rise after the collision? (The specific heat of the bullet is 128 J/(kg °C).) (d) Suppose that the table has a coefficient of %3D %3D kinetic friction of u=0.2. At what distance will the block stop? M Vo 0. m
Latent heat and phase change
A physical process in which a conversion among the basic states or phases of matter, i.e., solid, liquid, and gas takes place under the effect of a certain temperature and pressure is referred to as a phase change. Generally, the phase change of a substance occurs when heat transfer takes place between the substance and its surroundings. Based on the direction in which heat transfer takes place, different types of phase changes can occur.
Triple Point of Water
The branch of physics in which observer deals with temperature related properties is called thermodynamics.
Boiling Point of Water
Everyday examples of boiling is, boiling milk, heating water. One would have observed that when we heat water it goes through various stages and at one point bubbles show in water, and water keeps splashing with bubbles bursting, we in layman terms say that water is boiling.
Freezing Point of Water
In general, the freezing point of water is 0° Celsius, or 32° Fahrenheit. This is the temperature at which water will ordinarily change from its liquid state to its solid state (ice). However, there are certain conditions that can affect the freezing point of water. For example, a liquid may be supercooled or contain impurities so that it does not freeze at the ordinary freezing point.
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