Which characteristic is the same for all electromag Jetic waves in a vacuum?
A. Wavelength of the photons
B. Energy stored in photons
C. Speed of the photons
D. All of the above

What kind of enegia produces the mixture of bicarbonate and vinegar  chemical producetion

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.

Answerreduces the visual acuity or sharpness