Unit Conversions - Energy, Power, Flux - Space Math Page 2
ADVERTISEMENT
1
2Answer Key
84
Problem 1 –
Watts
10 million ergs
1 meter
1 meter
ergs
6
Answer: 1300 --------- x -------------------- x ------------ x --------- = 1.3 x 10
-----------
2
2
meter
sec Watt
100 cm
100 cm
sec cm
Problem 2 –
1 Joule
1
Joules
Answer:
100 watts x (----------------- ) x ------------------- =
4.0 -----------------
2
2
1 sec watt
25 meters
sec meters
Problem 3 –
1 Joule
Joules
Answer: 1 kilowatt-hour x ------------------- = 1,000 --------- x 1 hour
1 sec 1 Watt
sec
Joules
3,600 sec
1,000 ------------ x 1 hour x (------------- )
sec
1 hour
Joules
1,000 ----------- x 3,600 seconds
sec
1 megaJoule
3,600,000 Joules x ------------------------- = 3.6 megaJoules
1,000,000 Joules
Problem 4 -
2
2
Answer: Area of roof =
27 feet
x (1 meter/ 3 feet) x (1 meter/ 3 feet) = 3 meter
Flux = Power/Area so Power = Flux x Area:
Joules
Joules
2
Power = 300 ---------------- x
3 meters
=
900 ----------
2
sec meter
sec
Energy = Power x Time
Joules
3,600 sec
= 900 ---------- x ( -------------) x 8 hours = 25,920,000 Joules
sec
1 hour
10 million ergs
=
25,920,000 Joules x ( ------------------- ) = 258.2 trillion ergs
1 Joule
Space Math
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education