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weeeeeb [17]
3 years ago
13

Q.20

Physics
1 answer:
Svetllana [295]3 years ago
6 0

Answer:

what are you talking about

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An electrical heater is used to supply 245.0 J of energy to a 15.0 g sample of aluminum, originally at 310.0 K. Determine the fi
Softa [21]

Answer:

T_f=328.1 K

Explanation:

To determine the final temperature of the sample, we use the specific heat formular as follows:

Q=mCp(T_f-T_0)\\T_f=\frac{Q}{mCp} +T_{0}\\mol Al= \frac{15g}{26.98gmol^{-1}}=0.555 mol\\T_f=\frac{245.0J}{0.555mol\times24.35Jmol^{-1}K^{-1}} +310.0K\\T_f=328.1 K

Finally, the temperature of the aluminium sample has raised 18 K.

8 0
3 years ago
What is the effect on climate from these factors??
fenix001 [56]
The effect on the climate is that the climate goes up
7 0
4 years ago
What are meant by the statement relative density of gold are 19.3
Doss [256]
It means that 19.3g of gold is packed into 1cm^3.
7 0
3 years ago
A 6.00-mH solenoid is connected in series with a 5.0-μF capacitor and an AC source. The solenoid has internal resistance 3.0 Ω w
son4ous [18]

Answer:

5773.50269 Hz

23 A

Explanation:

L = Inductance = 6 mH

C = Capacitance = 5 μF

R = Resistance = 3 Ω

\epsilon = Maximum emf = 69 V

Resonant angular frequency is given by

\omega=\dfrac{1}{\sqrt{LC}}\\\Rightarrow \omega=\dfrac{1}{\sqrt{6\times 10^{-3}\times 5\times 10^{-6}}}\\\Rightarrow \omega=5773.50269\ Hz

The resonant angular frequency is 5773.50269 Hz

Current is given by

I=\dfrac{\epsilon}{R}\\\Rightarrow I=\dfrac{69}{3}\\\Rightarrow I=23\ A

The current amplitude at the resonant angular frequency is 23 A

7 0
3 years ago
What region of the electromagnetic spectrum contains wavelengths the size of an atom? (10^-10 meters) What frequency does this w
DENIUS [597]

If a photon has a wavelength of about 10^-10 meters, it would be certainly in the X rays region and it would have a frequency of 2.99792458x10^18 Hz, that you can easily calculate using the relation that states that the product of the wavelength and the frequency of an electromagnetic wave aka light is always equal to 299,792,458 m/s which is the exact value of the speed of light!
3 0
4 years ago
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