The mass of a penny is measured on two different balances, an analytical balance and a top loader balance. The mass of the penny is 2.4881 grams according to the analytical balance. The mass of the penny is 2.49 grams according to the top loader balance . Which balance has a higher sensitivity?

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.

What are the dimensions of the cross section that passes through the points a, f, g, and d?

What is the period of a wave traveling 5 m/s if its wavelength is 20 m/s