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sasho [114]
3 years ago
11

Compare and contrast between reflection and refraction

Physics
1 answer:
Tcecarenko [31]3 years ago
3 0

Differences:

<u>Reflection</u> is described as the reverting back of light or sound waves in the same medium, when it falls on plane.

<u>Refraction</u> means the shift in direction of the radio waves, when it enters medium with different density.

Comparisons:

<u>Reflection and refraction</u> <em>both</em> change the direction of light and both <em>do not </em>absorb light. All light waves can be reflected and refracted.

Both <u>Reflection and Refraction</u> are phenomenon related with wave motion of sound, and electromagnetic waves, thus including light.

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and james west is ALIVE

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Which of the following best expresses the definition of mass?
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The quantity of matter in a body regardless of its volume or of any forces acting on it.
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A student drops two metallic objects into a 120-g steel con- tainer holding 150 g of water at 25°C. One object is a 200-g cube o
marissa [1.9K]

Answer:

The mass of the aluminum chunk is 258 g

Explanation:

Given;

mass of steel container =  120-g

mass of water = 150 g

initial temperature of water, = 25°C

mass of copper cube, M_{cu} = 200 g

initial temperature of the copper cube, T_c_u = 85°C

initial temperature of the aluminum chunk T_A_l = 5.0°C

Neglecting heat loss, heat exchanged by the two metallic objects is the same since initial temperature is equal to final temperature of water.

M_{Al}C_{Al} \delta T_{Al} = M_{cu}C_{cu} \delta T_{cu}

where;

C_{AL} is specific heat capacity of aluminum

\delta T_{Al} is change in temperature of aluminum

C_c_u is the specific heat capacity of copper

\delta T_c_u is the change in temperature of copper

M_{Al}C_{Al} \delta T_{Al} = M_{cu}C_{cu} \delta T_{cu} \\\\M_{Al} = \frac{M_{cu}C_{cu} \delta T_{cu}}{C_{Al} \delta T_{Al}} \\\\M_{Al} = \frac{0.2*387*60}{900*20} = 0.258 \ kg

Therefore, the mass of the aluminum chunk is 258 g

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3 years ago
Which wave must have a medium to travel?
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Letter B

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A mass M is attached to an ideal massless spring. When this system is set in motion with amplitude A, it has a period T. What is
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<em>The period of the motion will still be equal to T.</em>

<em></em>

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for a system with mass = M

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The equation for the period T is given as

T = 2\pi \sqrt{\frac{M}{k} }

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