Answer: 0.1416 kg
Explanation:
Total Mass = Mass of beach ball + Mass of air inside
Mass of beach ball = 0.100 kg
Mass of air = density * volume
Density = 1.30 kg/m^3
Radius (r) = 21.6 cm = 0.216 m
Volume (sphere) = π * r^3 = π * (0.216)^3 = 0.032 m^3
Hence:
Mass of air = 1.30 * 0.032 = 0.0416 kg
Total Mass = 0.100 + 0.0416 = 0.1416 kg
Answer:
10 seconds
Explanation:
because the cat is moving one m/s slower than the dog, the dog has a relative speed of 1 m/s. 10 meters would take 10 seconds for the dog to cover
Answer:
c. decreases 45°C
Explanation:
because it just makes sense
Answer;
Q = 359.2-J
Explanation;
Given that;
Constants for mercury at 1 atm
Heat capacity of Hg(l) is 28.0 J/(mol*K)
melting point is 234.32 K
Enthalpy of fusion is 2.29 kJ/mol
17.7-g Hg / 200.6g/mol = 0.0882 mol Hg;
°C + 273 = 298 K;
2.29-kJ/mol = 2290-J/mol
Q = (m x ΔT x Cp) + (m x Hf)
Q = 0.0882-mol x (298 - 234.32) x 28.0-J/mol*K) + (0.0882-mol x 2290-J/mol)
Q = 157.26-J + 201.978-J
Q = 359.2-J
Q=359-J (3 sig fig allowed due to 17.7-g given in problem)
