Answer:α = 1.00 rad/s², τ = 90.0 N•m, KEr = 1.12 kJ
Explanation:
m = 795/9.81 = 81.0 kg
ω₁ = 47.79 rev/min(2π rad/rev) / (60 s/min) = 5.00 rad/s
α = (ω₁ - ω₀)/τ = (5.00 - 0.00)/5.00 = 1.00 rad/s²
I = ½mR² = ½(81.0)(1.49²) = 90.0 kg•m²
τ = Iα = 90.0(1.00) = 90.0 N•m
KEr = ½Iω² = ½(90.0)5.00² = 1,124.477 ≈ 1.12 kJ
Answer:
Convex lens is used in astrology
Answer:
They must have about 166 randomly 60 watt light bulbs to achieve the result
N = 166
Explanation:
σ = 30
% 99 = 2.576
Using the standard equation of statistics knowing the difference between the measurement have a margin error no larger than 6 can solve
σ = √∑ ( x - z' )² / N
Solve to N
N = ( % * σ / Δ x ) ²
N = ( 2.576 * 30 / 6 )²
N = 12.88 ²
N = 165. 89 44 ≅ 166
Answer:
5
Explanation:
Volume of raft, 
Density of raft, 
Total weight= Buoyant force
Assuming n number of friends weighing 65 Kg then
(20+55+65n)g= Buoyant force
Buoyant force will be given by multiplying density of water by volume by acceleration due to gravity

g is on both sides so they cancel
75+65n=400
65n=400-75=325

Therefore, 5 friends each weighing maximum of 65 Kg can go with you on one trip