K, P, K, K, P, K, K, P, K, P.
Kinetic:
Walking down the hall.
Dropping a pencil.
Potential:
A book sitting on the edge of a shelf.
A stretched out rubber band.
Answer:
It is sensible heat- the amount of heat absorbed by 1 kg of water when heated at a constant pressure from freezing point 0 degree Celsius to the temperature of formation of steam i.e. saturation temperature
So it is given as - mass× specific heat × rise in temperature
i.e. 4.2 × T
4.2 × (100–0)
So it is 420kj
If you ask how much quantity of heat is required to convert 1 kg of ice into vapour then you have to add latent heat of fusion that is 336 kj/kg and latent heat of vaporization 2257 kj/kg (these two process occur at constant temperature so need to add rise in tempeature)
So it will be
Q= 1×336 + 1× 4.18 ×100 + 1× 2257
Q = 3011 kj
Or 3.1 Mj
Hope you got this!!!!!!
Answer:
F = 316.22 N
Explanation:
Given that,
The wind blows a jay bird south with a force of 300 Newtons.
The jay bird flies north, against the wind, with a force of 100 newtons.
Both the forces are acting perpendicular to each other. The net force is given by the resultant of forces as follows :
Hence, the net force on the jay bird is 316.22 N.
There are two parts to this solution: The down part for the helmet, and the up part for the sound. The down part has to be solved first, before the up part.
-- The helmet falls 78.4 meters. How long does that take ?
In gravity,
Distance = (1/2) (acceleration) (Time²)
78.4 m = (1/2) (9.8 m/s²) (Time²)
Time² = (78.4 m) / (4.9 m/s²)
Time² = 16 sec²
Time = 4 seconds.
-- The crew heard the sound of helmet hitting the ground 4.23 seconds after their buddy dropped it.
We just calculated that it took 4 seconds for it to hit the ground.
So it took 0.23 second for the sound of the clunk to propagate the 78.4 meters back up to them. What's that speed ?
Speed = (distance) / (time)
Speed = (78.4 m) / (0.23 sec)
<em>Speed = 340.9 m/s</em>