Randomization in an experiment means that the experimental units or subjects are selected as a simple random sample from the whole population under study.

A. True

B. False

The phases of the moon depend on how much of the lighted side of the moon can be seen from Earth.

The third floor of a house is 8m above street level. how much work must a pulley system do to lift a 150-kg oven at a constant speed to the third floor?

How are mixtures and pure substances related?

Which is the best description of the acceleration of an object? an airplane changes elevation from 10,000 ft to 5,000 ft a cars velocity changes from 25 m/s to 20 m/s in 5 seconds a runner travels 100 m in one minute a remote-control car speeds up

Which event is an example of a contact force?

According to the law of universal gravitation, as mass increases, gravity As distance increases, gravity

You and your friends are doing physics experiments on a frozen pond that serves as a frictionless, horizontal surface. Sofia, with mass 80.0 kg, is given a push and slides eastward. Elena, with mass 55.0 kg, is sent sliding northward.

Which practice fits the definition of conservation? using more of a mineral resource than needed not using a necessary mineral resource at all mining a mineral without regard to the surface soil and vegetation above it recycling cans that contain a

The word family implies that the elements in a family have like properties. What property do the elements of the noble gas family all share?

What is the energy of an object because of its potential and kinetic energies? A.) chemical energy B.) electrical energy C.) nuclear energy D.) mechanical energy