Convert the temperature scales:
-> TC (Celsius Temperature)
-> TF (Fahrenheit Temperature)
->TC/5 = TF - 32/9
-30/5 = TF - 32/9
-270 = 5TF - 160
5TF = -270 + 160
5TF = -110
TF = -110/5
TF = -22 Fahrenheit
- 30 °C = -22 °F
So, -30°C is warmer than -30°F.
-30°F is lower than (30°C) -22°F.
When the ion concentrations in the cathode half-cell are increased by a factor of 10, the change in the cell voltage is ln10 times greater. This comes from the Nernst equation. Use variation to solve for the cell voltage in terms of the initial cell voltage before increasing the ion concentrations by 10.
Answer:
the hypotenuse = 13.78 cm
Ф = 27.44°
θ = 62.56°
explanation:
All of the observations except "powerful gravitational field" are consistent with the current theory of black holes.
The gavitational field of a black hole is thought to be no different than that of an ordinary star with the same mass.
Assuming the turntable is circular, its circumference is
(2 π) x (its radius) .
That's the distance covered by a point on its rim during every complete revolution.
The distance covered by the same point during 45 revolutions is
(45) x (2 π) x (radius).
So we can write . . .
Speed of the point = (45 rev/min) · (2 · π · 8 cm / rev)
Speed = (720 π) cm/minute
Speed = 12π cm/second
Speed = 37.7 cm/sec
<em>Speed = 0.377 m/s </em>
