Answer:
Speed = 328 m/s
Explanation:
Given the following data:
Wavelength = 4 m
Frequency = 82 Hz
To find the speed of the radio wave;
Speed = wavelength * frequency
Speed = 4 * 82
Speed = 328 m/s
Therefore, the radio wave is travelling at 328 meters per seconds.
Radio waves can be defined as an electromagnetic wave that has its frequency ranging from 30 GHz to 300 GHz and its wavelength between 1mm and 3000m. Therefore, radio waves are a series of repetitive valleys and peaks that are typically characterized of having the longest wavelength in the electromagnetic spectrum.
Answer:
Light bulbs are rated in watts to indicate how much energy they consume. Does the wattage of a light bulb have anything to do with brightness? ... In general, that works well with traditional incandescent light bulbs. ... It's also worth noting that kW can be synonymous with “demand” if you're talking to a utility ...
Explanation:
Light bulbs are rated in watts to indicate how much energy they consume. Does the wattage of a light bulb have anything to do with brightness? ... In general, that works well with traditional incandescent light bulbs. ... It's also worth noting that kW can be synonymous with “demand” if you're talking to a utility ...
Answer:
ΔU = -17640 J
Explanation:
use the formula ΔU = mgΔh for the change in potential energy
m = 60 kg
g = 9.8 m/s^2
Δh = 60 - 90 = -30 m
ΔU = mgΔh
ΔU = 60 * 9.8 * -30
ΔU = -17640 J
there was a decrease of 17640 joules in potential energy
Answer:
Find the dimension of each and every quantity in all the options to check whether they are the same or not. We can use any one formula of each identity to find its dimension.
Complete step by step solution:
To find the dimension of a quantity, we can use any formula related to that quantity but we will use the easiest ones to save time.
Force-
from Newton’s law of motion,
F=maF=ma
Dimension of force =[M][LT−2]=[MLT−2]=[M][LT−2]=[MLT−2]
Work done-
W=F×sW=F×s
Dimension of work=[MLT−2][L]=[ML2T−2]=[MLT−2][L]=[ML2T−2]
Momentum-
p=mvp=mv
Dimension of momentum=[M][LT1]=[MLT−1]=[M][LT1]=[MLT−1]
Impulse-
I=F×tI=F×t
Dimension of impulse=[MLT−2][T]=[