what will be temperature on the kelvin scale if the indicated temperature on the Fahrenheit scale is 200degree Fahrenheit

Answers

Answer 1

Answer: We can use Kelvin = 5/9 (Fahrenheit - 32) + 273.15

K = 5/9(168) + 273.15

K = (93 and 1/3) + 273.15

K = 366.48 (rounded)

Answer 2

Answer: kelvin=366.38(approximately)

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Light can travel through a medium, but it does not require a medium.
a. True
b. False

Answers

That's true. Light can travel through glass, water or jello,
but it also gets here very effectively through empty space,
from the sun and stars.

What would likely happen if you were to touch the flask in which an endothermic reaction were occuring? A. The flask would probably feel cooler than before the reaction started.
B. The flask would probably feel warmer than before the reaction started.
C. The flask would feel the same as before the reaction started.
D. none of the above

Answers

Answer: A. The flask would probably feel cooler than before the reaction started.

Explanation: An endothermic reaction is a type of of chemical reaction in which energy is absorbed from the surroundings. The temperature of the surrounding decreases.

An Exothermic reaction is a type of of chemical reaction in which energy is released into the surrounding. The temperature of the surrounding increases.

When an endothermic reaction takes place in the flask, the heat is absorbed by the flask and thus the temperature of the surrounding (here the flask) will decrease which can be felt by touching the outside of the test tube. Thus the flask would appear colder.

CCA Unit 3: Heat Energy and Reactions Unit Test Answers

Please keep in mind these are for CHECKING YOUR ANSWERS, not for using as an answer key to cheat!!

1. A

2. C

3. A

4. A

5. C

6. D

7. C

8. C

9. A

10. A

11. C

12. A

13. C

14. C

15. C

16. B

17. D

18. B

19. Q= = mass * specific heat * delta T 343 = 55.0 * specific heat (86.0-19.0) 343=3685 * specific heat specific heat = 0.0931 cal/g Celsius

20. Temperature is absolute while heat is relative. The direction of heat always travels to the warmer temperature of the object to the cooler one.

21. Ke=[C]^2/[A]^3[B}^2

22. A chemical reaction is spontaneous if an increase in the total entropy of the system and surroundings accompanies it.

Example:

4 Fe + 3 O 2 -> Fe 2 O 3

Enjoy guys ;)

According to Charles's law whenever the temperature of a gas at constant pressure decreases the volume increases

Answers

I believe the answer is false

The answer is false.

A object of mass 33 is dropped from a height of 85 meters. Calculate the average power developed by the object in falling through this distance.Take g as 9.81 m/s^2

give the answer in watts to three significant figures

Answers

Power = Work done / Time taken.

Work done = mgh
Mass, m = 33kg ( Am presuming it is 33 kg).
h = 85 m.
Work done = 33 * 9.81* 85 = 27517.05 J.

Time taken.
Since object was dropped from height, it fell under gravity.
Using H = ut + (1/2) * gt^2. u = 0.
   H = 1/2 gt^2.
   t =   (2H/g) ^ (1/2)
   t = (2*85/9.81) ^ 0.5 = 4.1628 s.

Power = 27517.05 / 4.1628 = 6610.23 Watts.
   = 6610 W to 3 S. f.

Only the component of force perpendicular to the direction motion does work. true or false

Answers

No. Only the component of force parallel
to the direction of motion does work.

Calculate the Energy (E) in joules for that wavelength and record it in the table below. Remember that E = HF, where h the Planck constant (6.6 *10^-34 j*s)

Answers

In that formula for Energy, 'F' is the frequency of the photon.
But Frequency = (speed)/(wavelength), so we can write the
Energy formula as
   E = h c / (wavelength) .

So the energy, in joules, of a photon with that wavelength, is . . .

   E = (6.6 x 10⁻³⁴) x (3 x10⁸) / (that wavelength)

      = (1.989 x 10⁻²⁵) / (that wavelength, in meters) .

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