Answer: a. (Q), (T), (E)
b. (Q), (T), (E), (W)
Explanation: <u>Thermal</u> <u>Energy</u> and Temperature are closely related: when the temperature rises causing atoms or molecules to move, thermal energy is produced. Thermal energy is the energy within the system.
<u>Mechanical</u> <u>Work</u> is the amount of energy transferred due to an applied force.
<u>Chemical</u> <u>Energy</u> is the energy contained in the bonds of chemical structures of the molecules released when a chemical reaction happens.
Given the explanations, let's analyse the situations:
a. For an ice cube to be melting, it has to be absorbing heat, which means its thermal energy is changing and, consequently, so does its temperature;
b. First, the gas inside the cylinder reaches a thermal equilibrium, which means its thermal energy and temperature changed. Since there were exchange of heat to reach the equilibrium, the gas absorbed or gave off heat. After the equilibrium, when the piston starts to be moved, the energy of the pressure is transferred to the gas, so mechanical work had been done.
Answer:
The focal length of the lens is 5.54 cm and the height of the image is -0.89 cm.
Explanation:
Given that,
Height of object h = 2 cm
Object distance u= -18 cm
Image distance v= 8 cm
We need to calculate the focal length of the lens
Using formula of lens
![\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7Bf%7D%3D%5Cdfrac%7B1%7D%7Bv%7D-%5Cdfrac%7B1%7D%7Bu%7D)
Where, f = focal length
Put the value into the formula
![\dfrac{1}{f}=\dfrac{1}{8}-\dfrac{1}{-18}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7Bf%7D%3D%5Cdfrac%7B1%7D%7B8%7D-%5Cdfrac%7B1%7D%7B-18%7D)
![\dfrac{1}{f}=\dfrac{13}{72}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7Bf%7D%3D%5Cdfrac%7B13%7D%7B72%7D)
![f=5.54\ cm](https://tex.z-dn.net/?f=f%3D5.54%5C%20cm)
(II). We need to calculate the height of the image
Using formula of magnification
![m =\dfrac{v}{u}=\dfrac{h'}{h}](https://tex.z-dn.net/?f=m%20%3D%5Cdfrac%7Bv%7D%7Bu%7D%3D%5Cdfrac%7Bh%27%7D%7Bh%7D)
![\dfrac{v}{u}=\dfrac{h'}{h}](https://tex.z-dn.net/?f=%5Cdfrac%7Bv%7D%7Bu%7D%3D%5Cdfrac%7Bh%27%7D%7Bh%7D)
Put the value into the formula
![\dfrac{8}{-18}=\dfrac{h'}{2}](https://tex.z-dn.net/?f=%5Cdfrac%7B8%7D%7B-18%7D%3D%5Cdfrac%7Bh%27%7D%7B2%7D)
![h'=\dfrac{8}{-18}\times2](https://tex.z-dn.net/?f=h%27%3D%5Cdfrac%7B8%7D%7B-18%7D%5Ctimes2)
![h'=-0.89\ cm](https://tex.z-dn.net/?f=h%27%3D-0.89%5C%20cm)
Hence, The focal length of the lens is 5.54 cm and the height of the image is -0.89 cm.
The answer is A. <span>The component waves have different frequencies.
The magnitudes of reinforcement usually really dependent on the number of frequencies and interference is usually caused due to the difference in frequencies. So, we can conclude that if the frequencies are different and causing interference, the reinforcement will also different
</span>
Because it is shorter and easier to write out such as .100000000000000 is easier to write in Scientific notation
The 60 and the 5 in parallel have an equivalent resistance of 4.615 ohms. (rounded). The 10 in series makes it 14.615...