Answer:
23. Option B. Hertz
29. Refraction.
Explanation:
23. Determination of the unit of measurement of frequency.
Frequency is simply defined as the number of oscillation made in one second. Mathematically, frequency can be represented as:
Frequency = 1/period
f = 1/T
Period is measured in seconds.
Thus, the unit of frequency becomes
f = 1/T
f = 1/s = s¯¹ (Hertz)
Therefore, the unit of frequency is Hertz.
29. When a wave enters a new medium, the speed of the wave is uttered. This leads to the bending of the wave. When this occurs, we can say refraction has taken place.
Answer:B
Explanation:
Magnetic field lines form close loops and never intercept
Think it’s A. Cause a blue supergiant temperature will be around 20,000k
Answer:
0.08 ampere
Explanation:
Power = voltage x current
W = v x I
Given
Power = 10.0 w
V = 120v
I = ?
Therefore
10.0 = 120 x I
Divide both sides by by 120
10.0/120 = 120/120 x I
0.08 = I
I = 0.08 ampere