1. A girl uses a skateboard to travel 65 meters in 25 seconds. What is her average speed?

A solenoid has 332 turns and a length of 14 cm. If a current of 0.88 A produces a magnetic flux density of 0.28 T in the core of the solenoid, what is the relative permeability of the core material?

Nightmares occur during ___ sleep

A block has acceleration a when pulled by a string. if two identical blocks are glued together and pulled with twice the original force, what will their acceleration be?

This type of stretch prepares your muscles to exercise or participate in sports. static ballistic dynamic

What would be three forces acting on a roller coaster? I have gravity, air resistance, but I can't think of the third.

Why is copper a pure substance

Over the course of a martian year, what are the ranges of the rms speeds of the co2 molecules.

Why is it important that all scientists use the metric system?.

Whay is moon non-lominous body

How many (whole number of) 91 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton? A metric ton is 1.000 * 103 kg. Answer in units of people.