Let's see..
- Melting
-Evaporation.
Two.
Answer:
172.9m
Explanation:
h = 1/2 gt^
First calculat for t using
v = gt
t = v/g = 58.8/10
= 5.88secs
now h = 1/2 x 10 x 5.88^2
h =1/2 x 10 x 34.57
= 345.74/2
= 172.9m
Answer:
Explanation:
Current drawn by electric heater = power/volt =1500/120 = 12.5 A.
current drawn by hair drier at 600 watt = 600/120 =5 A
current drawn by hair drier at 900 watt = 900/120 = 7.5 A.
Total current drawn by heater and hair drier used at 900 watt
= 12.5 + 7.5 = 20 A
Breaking current =20 A
So fuse will trip at this point .
Multiply the masses by the respective distances:
(12 kg) (2 m) = 24 J
(25 kg) (1 m) = 25 J
so the heavier bag takes more work to lift, and (b) is the answer.
(d) is technically correct if the sacks are carrying different contents whose masses are not equal, but since we don't know what's inside each sack, assume 12 kg and 25 kg are the masses of each sack *and* their contents.
It will be 80 miles and it can be done only in 16 min
