Answer:
The Fluorescent lamp is most efficient
Explanation:
66.7 lumens/watt
Fluorescent was always the most efficient vs. incandescent or halogen gas envelope
This question needs some updating as LED lamps now beat fluorescents in life expectancy and lumens/watt.
- The work done by the pump is 13475 J.
- The power of the pump is 385 W.
<u>Explanation:</u>
When a force causes a body to move work is being done on the object by the force. Work is the measure of energy transfer when a force moves an object through a distance. The work done is the product of mass, gravity, and height.
Work done = m * g * h
= 55 * 9.8 * 25
Work done = 13475 J.
Power is defined as the rate of doing work with time.
Power = work done / time
= 13475 / 35
Power = 385 W.
Answer:
sometimes sunset could sometimes cause a pink and orange cloud
-- Top picture:
'a' and 'b' have the same magnitude, and both are positively charged.
-- Bottom picture:
The charge on the particle is negative.
Answer:
Basic kinematics, negating drag and assuming ideal conditions, we use the equation:
d=vi*t+1/2*a*t^2
Since vi is 0 (we know this because you’re dropping it, not throwing it)…
…and the only acceleration acting on it is gravity, a=9.8 m/s^2…
…we get
d=1/2(9.8)(5)^2
Explanation:
Some quick mental math tells us that this is about 125 m.
Plugging it in, we find it to be 122.5 m.
