Answer:
B. They required fewer people to operate.
Answer:
Definition of direct current. : an electric current flowing in one direction only and substantially constant in value
Explanation:
Direct current (DC) is the one directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams. The electric current flows in a constant direction, distinguishing it from alternating current (AC). A term formerly used for this type of current was galvanic current.
A hypothesis proposes a mechanism of change that can be tested. If the results indicate the hypothesized mechanism is not the one in operation it narrows the field and we know more. A falsified hypothesis tested by a well designed experiment still provides real evidence about the world.
<span>It was once thought that maggots spontaneously arose from carrion. This was tested and falsified providing evidence this was not how new generations of flies appeared. This still left the question of how flies generated new life to be explored. One falsified hypothesis does not block further research into the question.
</span><span>Even a failed hypothesis can increase scientific knowledge if done correctly. By knowing this hypothesis is not how something works, you save time for future scientists and can now use your effort in other investigations. That is the real value of hypothesis that are not supported by evidence.</span>
Answer: Red has highest wavelength
Explanation:
Electromagnetic radiation is defined as the radiation which is associated with both electrical and magnetic component. These radiations travel in vacuum as well and travel with the speed of light.
The Electromagnetic visible spectrum involves violet, indigo, blue , green, yellow, orange and red which are arranged in order of increasing wavelength and decreasing frequency.
Thus red has highest wavelength and blue has lowest wavelength.
Answer:
It will take 
to fill a bottle with water.
Explanation:
Total capacity of tube 
cm.
Rate of full up the water in the tube 
Total full up the tube 
rate 
time
Learn more about seconds, refer :
brainly.com/question/1781825
