It can be said that the change is a chemical change. The green substance on the surface is copper oxide. It is a compound composed of the copper of the statue and the oxygen in the air.
Answer:
Explanation:
a ) Let let the frictional force needed be F
Work done by frictional force = kinetic energy of car
F x 107 = 1/2 x 1400 x 35²
F = 8014 N
b )
maximum possible static friction
= μ mg
where μ is coefficient of static friction
= .5 x 1400 x 9.8
= 6860 N
c )
work done by friction for μ = .4
= .4 x 1400 x 9.8 x 107
= 587216 J
Initial Kinetic energy
= .5 x 1400 x 35 x 35
= 857500 J
Kinetic energy at the at of collision
= 857500 - 587216
= 270284 J
So , if v be the velocity at the time of collision
1/2 mv² = 270284
v = 19.65 m /s
d ) centripetal force required
= mv₀² / d which will be provided by frictional force
= (1400 x 35 x 35) / 107
= 16028 N
Maximum frictional force possible
= μmg
= .5 x 1400 x 9.8
= 6860 N
So this is not possible.
Answer:
the heat flux between the person and the room = 6.0036 x 10 17 w/m2
Explanation:
The appropriate formular for the steffan boltzmann constant is used as it relates to the heat flux and the steps is as shown in the attachment.
A 18 wheeler weigh "<span>80,000 lbs"</span>
Answer:
Explanation:
Here as we know that total angular momentum is always conserved for child + round system
so here by angular momentum conservation we have
here we have
(inertia of boy)
now we have
