m = mass of water in bathtub = 62.7 kg
= initial temperature of water in tub = 31 c
M = mass of water added = ?
= initial temperature of water added = 76 c
T = final equilibrium temperature of the system = 40.3 c
c = specific heat of water = 4186
Using conservation of heat
Heat gained by water in tub = Heat lost by water added
m c (T - ) = M c ( - T)
m (T - ) = M ( - T)
(62.7) (40.3 - 31) = M (76 - 40.3)
M = 16.3 kg
Answer:
17.0 m s^-1
Explanation:
This question can be answered using suvat equations: (I'm assuming you know what these are)
s = 34.0 m
u = 0
v = ?
a = N/A
t = 4.00s
The only suvat equation that doesn't contain "a" is s = (u+v/2)t.
Make "v" the subject so v = 2s/t.
v = (2 x 34.0)/4.00 = 17 m/s
Answer:
Step-by-step explanation:
i dont know man im getting nervos
Answer:
3.06km/hr
Explanation:
Average speed (km/hr) = distance (km)/time(hr)
Total average speed = 152/10
= 15.2km/hr
For the first 85km which he drove for 7hours, average speed = 85/7
= 12.14km/hr
His average speed in km/h for the remaining journey will, therefore, be:
15.2km/hr - 12.14km/hr
= 3.06km/hr