Answer: When the worker is on the top rung
Explanation: When the ladder was initially resting on the wall, the torque from the normal reaction on ladder from the horizontal surface is equal to the torque from the vertical surface on ladder.
The weight of the worker produces a torque which is in the direction of the torque from the normal reaction on ladder, produced by the vertical surface. Therefore for the ladder to stay in rotational equilibrium, the torque on ladder from the normal reaction produced by the horizontal surface must increase.
This increase is possible when the worker is on the lower rung, but as the worker goes high, the magnitude of normal reaction from the vertical surface would increase, thereby increasing the risk of slipping of ladder.
Some animals die, and that makes the ecosystem tilt its food chain.
Answer:
Both Particles having a positive charge.
I just did it.
Answer:
Q' = 3.21*10^{-5}C
Explanation:
To find the new magnitude of the charge you take into account that the voltage of the this capacitor is given by:
Q: total charge
d: distance between parallel plates
A: area of the plates
εr: dielectric constant
εo = dielectric permittivity of vacuum
for the case of the air εr = 1, then,
(1)
When a dielectric material is placed in between the plates, you have, for the same voltage, and for a different charge:
(2)
you equal the equation (1) and (2) and obtain:
by replacing you obtain:
Similar to the other works of Giotto, he puts figures and
objects in discrete locations to improve the disposition of the piece. In the
Lamentation of Christ, he improves the sorrow and misfortune in the painting by
putting objects and figures in a way that the whole thing leads to the section
of the painting where The Virgin Mary holds Jesus’s head in her arms which
makes this the focal point of the painting.