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defon
3 years ago
5

Match the following:

Physics
1 answer:
joja [24]3 years ago
8 0

Explanation:

1. study of conversion of heat to mechanics → thermodynamics

A branch of physical science which deals with heat and other forms of energy.

2. The Law of Conservation of Energy  → first Law of Thermodynamics

Energy cannot be created nor be destroyed. According to first law of thermodynamics total energy of the system is always constant.

3. Result of applied energy  → work

Work is the way of system to release its energy.

4. Principle that states that in any energy transformation some energy is dissipated as heat  → Second Law of Thermodynamics

5. energy of motion  → kinetic energy

Kinetic energy is defined as energy possessed by the body due to its motion.

6. work/displacement  → force

Work is product of force and displacement.

Work=Force \times displacement

Force=\frac{Work}{displacement}

7. power · time  → energy

Power is defined energy per unit time.

Power=\frac{Energy}{Time}

Energy=Power\times Time

8. Device that transforms heat energy into mechanical energy →  heat engine

heat engine is a device which converts the heat energy which is released due to combustion of fuel into a useful work that is mechanical energy.

9 . Energy due to position  → potential energy

Potential energy is defined as energy possessed by the body due to its position.

10. efficiency of a heat engine unit of heat  → calorie

11. Measure of molecular motion  → Temperature

Kinetic energy is directly proportional to temperature.

Greater the motion more will be the kinetic energy and with more will be the temperature.

12. Heat given off by a liquid with no change in temperature  → latent heat of fusion

Latent heat of fusion is defined as heat released by 1 mole of substance when it under goes phase change that is from solid to liquid.

13. Motion within solids  → vibrational motion

Vibrational motion is the motion in which particle oscillates from its mean position.

14. Phase of matter on the sun → plasma

Plasma is hot ionized gas with equal number of positive and negative ions. Due to high temperature of sun most the gas are in the plasma state.

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Explanation:

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3 years ago
A compact disc (CD) is read from the bottom by a semiconductor laser beam with a wavelength of 790 nm that passes through a plas
Ad libitum [116K]

Answer:

The value is   t  = 110 nm

Explanation:

From the question we are told that  

   The wavelength of the beam is \lambda  =  790 \  nm  =  790 *10^{-9} \  m

   The refractive index is  n_r  =  1.80

Generally from the condition for destructive interference  the depth  of the pit  is mathematically represented as

     t  = [ m  + \frac{1}{2} ] *  \frac{\lambda}{n_r}  *  \frac{1}{2}

Here m which is the order of the fringe is zero because both beams cancel out

So

       t  = [ 0  + \frac{1}{2} ] *  \frac{790 *10^{-9}}{ 1.80}  *  \frac{1}{2}

=>     t  = 110 *10^{-9} \  m

=>     t  = 110 nm

7 0
3 years ago
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