Explanation:
1. LED of 3W used for 6 hours.
Answer:
2730.304 KJ
Explanation:
How much heat is required to convert 0.8 kg of ice at -35°C into steam at 100 C?
Given that:
mass of ice (m) = 0.8 kg = 800 g
Initial temperature () = -35°C = 238 K
final temperature ()= 100°C = 373 K
Specific heat of ice () = 2.108 J/g.K
Specific heat of water () = 4.18 J/g.K
Latent heat of fusion () = 334 J/g.
Latent heat of vaporization () = 2230 J/g.
Total heat (Q) required to increase the temperature of ice from the initial temperature of 238K to final temperature of 373 K is given by the equation:
Translation of question
A ship is used to measure the depth of the sea using sound devices. A sound was fired at the bottom of the water and five seconds later there was a bounce. If the speed of sound in the water is 1500 m / s, then the depth of the water is
Answer:
3750 m
Explanation:
For sound to bounch back and be heard, this phenomenon is echo. Therefore, the distance traveled is 2d. Considering that speed is distance per unit time, expressed as s=d/t where d is distance, t is time and s is speed, in this case we say s=2d/t. Making d the subject of the formula then d=0.5st
Given 5 s as time and 1500 m/s as speed, we deduce that d=0.5*1500*5=3750 m
Answer:
a monochromatic
Explanation:
because now you no need to worry about it and you can just answer in your paper