Answer:
6 seconds
Explanation:
If it took the ball 3 seconds to reach the maximum height, then it also took 3 seconds to return to its original height. So it was in the air for a total of 6 seconds.
Answer:
0.68 kg-m²
Explanation:
F = Force applied by the muscle = 2615 N
r = effective perpendicular lever arm = 2.85 cm = 0.0285 m
α = Angular acceleration of the forearm = 110.0 rad/s²
I = moment of inertia of the boxer's forearm = ?
Torque is given as
τ = I α eq-1
Torque is also given as
τ = r F eq-2
using eq-1 and eq-2
r F = I α
(0.0285)(2615) = (110.0) I
I = 0.68 kg-m²
Is there any answers option?
Answer:
310.94 grams of benzene.
Explanation:
Q = mL
Q is quantity of heat energy required to melt benzene = 39.8 kJ
MW of benzene (C6H6) = 78 g/mol
L = specific latent heat of fusion of benzene = molar heat of fusion × MW = 9.95 kJ/mol × 1 mol/78 g = 0.128 kJ/g
m = Q/L = 39.8 kJ/0.128 kJ/g = 310.94 g