Explain why an experiment should test only one variable at a time

Which statement about speed and/or velocity is true? Velocity has both speed and direction. Speed is constant. Speed has direction and velocity. Speed is measured over time.

Sarah wants to know which brand of nail polish lasts the longest without chipping. She buys 4 types of nail polish - Essie (which she normally uses,) butter, OPI, and Sally Hanse.

Wht does covection current have in common with a thermometer?

Which of these is an example of a mechanical wave? A. the light of the Sun B. a car stuck in traffic C. the shaking from an earthquake D. X-rays from an X-ray machine at the dentist's office

the temperature of the core of the sun is about 15,000,000°C use scientific notation to write the temperature of the suns core

A moving object has a kinetic energy of 150 j and a momentum with a magnitude of 30.0 kg•m/s. determine the mass and speed of the object

How does changing depth affect water pressure

The mass of a rigid rod is 0.60 kg and its length is 39.0 cm. Calculate the moment of inertia (in kg · m2) for the rod if it is pivoted about an axis through the center of mass of the rod. (Assume the axis is perpendicular to the rod.

Does a rolling basketball have kinetic energy

Noah Formula is in an airplane which is flying at constant speed in a circular course of radius 6500 m, circling O'Hare's airplane prior to landing. Noah observed that the plane completes each round trip in 345 seconds (5 minutes & 45 seconds).