If you're only melting ice ... turning solid ice at 0°C into liquid water at 0°C ...
then you only need to know t<span>he latent heat of fusion for water</span>.
That's exactly what it means ... the amount of energy involved when a gram
of H₂O changes in either direction between liquid and solid, with no change
in temperature.
Answer: 6.67 m/s
Explanation:
Recall that average speed is the total distance covered by a moving body divided by the total time taken. The SI unit is metres per second.
i.e Average speed = distance/time taken
Given that:
Distance covered = 6.00 km
Convert kilometers to meters
If 1 km = 1000 m
6.00 km = (6.00 x 1000) = 6000m
Time taken to school = 0.250 hours
Convert time in hours to seconds
If 1 hour = 60 minutes & 1 minute = 60 seconds
Then, 0.250 hours = (0.250 x 60 x 60)
= 900 seconds
Average speed = ?
Average speed = 6000m/900s
= 6.67 m/s
Thus, your average speed to school is 6.67 m/s
Explanation:
c) is equal to the momentum of the fired bullet
Answer:
(a)7.48331 Km
(b) Directly above the tomb
(c) 12.53 degrees
Explanation:
Given that the distance is 3.5 Km, converted to meters we obtain 3500 m
Using the formula
where s is the distance and t is time, taking acceleration due to gravity as 9.8 then
t = 26.72 sec
We know that speed=distance/time hence to get the distance in part (a)
Distance=Speed*time
280 *26.72 = 7483.31 m converted to Km we obtain 7.48331 Km
(b)directly above the bomb
(c) 
Answer:
- <u>Because in both kind of motions, the position is periodically repeated. Both are simple harmonic motions.</u>
Explanation:
<em>Moving back and forth</em> means that the moving object goes through the same position every time a certain period of time elapses.
The same is true for the <em>circular motion</em>, every time the object completes a turn, the object is in the same position.
They are examples of simple harmonic motions. The time it takes the object to repeat a complete cycle is called period.
Therefore, in a grahp of position versus time, the curve that represents the position repeats itself every so often equal to one period, both for moving back and forth and for moving in a circle.
