Meandering valleylike features on the Moon's surface are called

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

Keneila is attempting to ski down a 20 m high friction free hill for the first time. she has a speed 10 m/s at the top. what is her kinetic energy when she is a the bottom, 20 m ? (a)2500 j (b)9800 j (c)12300 j (d)3100j (e)15000j

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec