Pros and cons of plastic bags
2 answers:
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Answer:
Explanation:
At first, you have to get the acceleration value from the given data.
s= 45m
u= 0 m/s
t = 6s
a = ?
45 = 0+ 0.5 × a × 6²
45 = 0.5 × 36 × a
45 = 18a
a = 2.5 m/s²
Now, you can use F=ma equation
F = ?
m = 1200kg
a = 2.5 m/s²
F = 1200 × 2.5
F = 3000 N
Answer:
a) Q = 80,000 cal
b) Q = 100,000 cal
c) Q = 540,000 cal
d) Q = 720,000 cal
Explanation:
a)1 kg from 0⁰ Ice to 0⁰ water, the heat produced is latent heat of fusion
= 1 * 80
= 80 kCal = 80,000 cal
b) 1 kg of O°C ice water to 1 kg of 100°C boiling water
Specific heat capacity, c = 1000cal/kg.C
c) 1 kg of 100°C boiling water to 1 kg of 100°C steam
Latent heat of vaporization is needed for this conversion
d) 1 kg of O°C ice to 1 kg of 100°C steam.
Q =
Q = 80,000 + 100,000 + 540,000
Q = 720,000 cal