Glass and water are thicker and heavier than air. They are said to be 'denser' than air. What happens is that light slows down when it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction.
Answer:
m = 4.44 [g]
Explanation:
This is a problem related to heat transfer and thermodynamics. The second law of thermodynamics tells us that heat goes in only one direction, from the highest temperature substance to the lowest temperature. In this case the heat goes from tea to ice. The heat transfer process could be defined as the heat rejection of one body will be equal to the Heat received by another body.
Where:
m = mass = 177[g] = 0.177[kg]
Cp = specific heat = 4186 [J/kg*C]
T_f = 29.1 [°C]
Ti = 31.1 [°C]
Q = 0.177*4186*(29.1 - 31.1)
Q = - 1481.8 [J]
Note: The negative sign means that the heat is rejected.
Recall that the heat rejected is equal to the heat transferred
As the ice is going through a phase change, the fusion latent heat should be used, i.e. when it passes from solid to liquid. The heat transfer for this process is calculated with the following expression.
Qin = m *hf
m = mass of the ice [kg]
hf = Fusion latent heat = 333700 [J/kg]
1481.8 = m * 333700
m = 0.00444 [kg] = 4.44 [g]
Answer:
A
Explanation:
it's hard to explain... sorry
1. The _________ of a wave is the density of the medium’s particles at the compression of the wave.
2. In which part of the wave are the particles of the medium closer together?
B)compressions
3. In sound waves, the distance between compressions is called the wavelength.
What is the distance between rarefactions called?
D)wavelength
4) A student takes notes in class.
Sound Waves
I. Created by a vibration
A. Vibration: something that causes air molecules to move
back and forth quickly and steadily
II. Move through a medium
A. Solid
B. Liquid
C. Gas
Which line of her notes contains an error?
C)II B
5)Which of these would most likely cause a sound wave?
C)a spoon hitting the side of a bowl while mixing
6)Allison wants to calculate the speed of a sound wave.
Which formula should she use?
D)distance traveled / time
7)When sound is created, it travels to the ear through a
B)medium.
8) Why do waves move faster at higher temperatures and in a solid phase?
D)There is more energy and the particles are closer together.
