Answer:
A
Explanation:
v = change of X / change of T
v = 200/19.3
The Balmer series lights fall under the category of VISIBLE LIGHT.
Balmer series light refers to the spectral emissiions that emanate from hydrogen atom. The spectrum of light from an hydrogen atom possess four different types of wavelengths, these are: 410, 434, 486 and 656 nm. It can be seen that the four wavelengths fall under the category of visible light, the wavelengths are more that 400 nm but lower than 700 nm.<span />
Answer:1.21A
Explanation: E= Ivt
I=?
V=220volts
E=7.2*10^6
t=45mins
Convert t from mins to secs.
T=45*60=2700secs
E=Ivt
I= E/vt
I=720000/220*2700
I= 720000/594000
I=1.21A
Answer:
6.77 m/s
Explanation:
First, in the x direction:
Given:
Δx = 3.17 m
v₀ = v cos 30.8° = 0.859 v
a = 0 m/s²
Δx = v₀ t + ½ at²
(3.17 m) = (0.859 v) t + ½ (0 m/s²) t²
3.17 = 0.859 v t
3.69 = v t
Next, in the y direction:
Given:
Δy = 0.432 m
v₀ = v sin 30.8° = 0.512 v
a = -9.81 m/s²
Δy = v₀ t + ½ at²
(0.432 m) = (0.512 v) t + ½ (-9.81 m/s²) t²
0.432 = 0.512 v t − 4.905 t²
Two equations, two variables. Solve for t in the first equation and substitute into the second equation:
t = 3.69 / v
0.432 = 0.512 v (3.69 / v) − 4.905 (3.69 / v)²
0.432 = 1.89 − 66.8 / v²
66.8 / v² = 1.458
v² = 45.8
v = 6.77
20 because if you go to 45 then scroll up it is at 20 degrees celcius