The length of a rectangle was measured to be (6 + 0.01) cm and its width was measured to be (4 0.01) cm, then the percentage of error in measuring the perimeter of
the rectangle is
(a) 0.2%
(b) 0.4 %
(c) 0.1 %
(d) 2 %

In a system, when potential energy decreases, then entropy also decreases. true false

When does your body conduct current more readily?

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.