I am pretty sure it’s B (carbon dioxide)
Answer:
156.24N
Explanation:
From the data above;
Mass = 23g = 0.023kg
V = 88m/s
Kinetic energy = ½mv²
K.e = ½* 0.023 * 88²
K.E = 89.056J
The force required to accelerate the arrow to that speed and energy in 0.57m
Using equation of motion;
V² = U² + 2as
But U =0
V² = 2as
a = v²/2s
a = 88² / (2*0.57)
a = 6792.98m/s²
The force (F) that accelerates the arrow with that velocity = ?
F = M*a
F = 0.023 * 6792.98
F = 156.24N
Answer:
entire wall temperature difference = 29.29 K
Explanation:
given data
temperature difference steel ΔT = 17.79 K
steel L = 1.471 cm
lead L = 2.416 cm
to find out
temperature difference across wall
solution
we know that here heat transfer by steel and lead are same
and
heat transfer = k×A×ΔT / L ................1
so
H( lead) = H (steel)
k×A×ΔT / L = k×A×ΔT / L .................2
here we know
k for steel = 14.4 W/mK
k for lead = 36.6 W/mK
so put here all value in equation 2
k×ΔT / L = k×ΔT / L
36.6×ΔT / 2.416 = 14.4×17.79 / 1.471
ΔT = 11.50 K
so
entire wall temperature difference = 11.50 + 17.79
entire wall temperature difference = 29.29 K
In our Solar System there are nine Planets, It's realy
