Answer:
3.88kg
Explanation:
From the question given, we obtained the following data:
W = 32N
g = 8.25 m/s2
M =?
W = M x g
M = W/g
M = 32/8.25
M = 3.88Kg
The mass of the object is 3.88kg
An air pollution analyst analysis air pollution to see if anything is wrong with it and to help stop air pollution
Answer:
Ft = 17.48°C
Explanation:
Ft is the final temperature. However, ice absorbs heat during two process of melting and cooling and as such, there is no loss of heat to or from the surrounding hence by conservation of energy.
Therefore,
Heat absorbed by water of 20g = heat rejected by water of 265g.
So; M(ice)[C(ice) [(ΔT) + LH(ice) + C(water)(ΔT)] = C(water) M(water) (ΔT)
So, 20[(2.108) [0 - (-20)] + 333.5 + 4.187(Ft - 0)]] = (285)(4.187) (25 - Ft)
To get;
7513 + 83.74 Ft = 29832.4 - 1193.3 Ft
So factorizing, we get;
83.74 Ft + 1193.3 Ft = 29832.4 - 7513
So; 1277.04 Ft = 22319.4
So; Ft = 22319.4/1277.04 = 17.48°C
Power = voltage x current.
Each light dissipates 24 watts of heat and light.