chemistry (charles law)
V₂=T₂V₁/T₁ T₁=303 K T₂=273 K
chemistry (charles law)
V₂=T₂V₁/T₁
physics
Given data: 1st rod: L₁, T₁, x₁, a => A₁=a²; 2nd rod: L₂, T₂, x₂, d => A₂= πd²/4; Hook’s Law for rods: σ=Eε T/A = E•x/L, 1st rod: T₁/a²= E•x₁/L₁, 2nd rod: 4T...
Science
m=D•V
Physics
m=39.0 kg s=4.5 m, F=135 N, μ=0.3 (a) W(F) = Fs (b) ΔU= W(fr) = μmgs (c) W(N) = 0 (d) W(mg) = 0 (e) KE=W(F) –W(fr) =Fs - μmgs (f) KE=mv²/2 v= sqrt(2•KE/m)
physics
The sums of torques respectively the edges of the board are: W•x-400•2 = 0 W• (2-x) -700•2=0 W•x=800 2W-W•x -1400 = 0 2W-800-1400=0 W=1100 N x=800/W =0.73 m
physical science
(A)tetrahedral This distorted tetrahedral arrangement is call bent. http://www.ausetute.com.au/shapemol.html
physics
h=s•sinα=v•t•sinα=1.5•21•sin30=15.75 m
physics
p=sqrt{p(x)²+p(y)²} = = sqrt{(10•9) ² +(20•12)²}=256.32 kg•m/s v= p/(m₁+m₂) =256.32/30 =8.54 m/s
physics
k =9•10⁹ N•m²/C² r=0.18 m q₁= 5•10⁻⁹ C q₂ = - 2•10⁻⁹ C PE= k•q₁•q₂/r = ...
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