The one that does not involve chemical energy would be : C. Coasting downhill on a bike
This one requires physical energy, To be categorized as chemical energy, the bond of chemical compounds has to be released
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Answer:
1 DC
2 DC
3 DC
4 AC
5 DC
Explanation:
AC means alternating current this type of current is not constant I.e time varying
This type of current is being supplied from power lines
DC means direct current and flows at a constant direction. This type of current is being supplied from batteries.
Answer:
Explanation:
brooke speed, u = 9 km/h = 2.5 m/s
Jamail speed, v = 4 km/h = 1.11 m/s
Let Booke is at (0, 0) and Jamail is at 35 m. So, at time t, the position of Brooke is (2.5 t , 0 ) and Jamail is (- 1.11 t, 35)
Let l be the distance between them.
Distance at t = 5 s
L = 39.38 m
Differentiate with respect to time
Put t = 5 s
dL/dt = 0.127 m/s
Answer:
Explanation:
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