Asled is at rest at the top of a 2 m high slope. the sled has a mass of 45 kg. the sled's potential energy isj. (formula: pe = mgh) hurry

Asap 1. which surface feature of the moon is characterized by mountainous areas? question options: maria terrae regolith craters 2.which statement describes surface features called maria on the moon? question options: layers of dust and rock deep areas of cooled lava deep, rocky and barren valleys highlands and mountainous areas

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?