DC Physics Final Review SCI11200

What is pseudoscience?

Junk Science.

What is inertia?

The law of inertia states that an object at rest will remain at rest.

What is a theory in science?

A synthesis of a large body of well-tested knowledge.

What is a scientific hypothesis?

An educated guess.

What is a valid hypothesis?

A valid hypothesis is testable.

What is an example of a scientific hypothesis?

It is a statement that can be proved or disproved.

What is the scientific method?

Observing, Predicting, Experimenting, Collecting Data, Organizing Findings.

What does a scientific law start as?

A hypothesis that is tested repeatedly and not contradicted.

What is a scientific statement?

A factual claim based on objective evidence that can be tested and verified through the scientific method.

How does mass compare on the Moon vs. Earth?

The mass of the apple would not change; it is the amount of substance.

What happens to weight on the Moon?

The apple would weigh less on the moon.

Regarding force during an impact, is the force greater on the bus or the bug?

The force that the windshield exerts on the bug and the force that the bug exerts on the windshield are the same magnitude.

What keeps a space probe traveling in remote outer space?

Inertia, according to Newton’s first law of motion.

What is weight?

The force acting on mass due to gravity, represented as W=mg.

Where does energy possessed by animals ultimately come from?

The energy source that powers most life on Earth is the Sun.

What happens when you blow air above a strip of paper?

The paper rises due to reduced pressure above it, causing lift.

When Joe pushes a crate at constant velocity, what does friction equal?

The friction between the crate and the floor is equal in magnitude to the force Joe is applying.

What is the effect on momentum when cycling at twice normal speed?

Your momentum would be doubled.

How is speed related to momentum?

Momentum depends on mass and speed and is represented as p=mv.

What does a constant net force on a moving van produce?

A constant acceleration.

Boiling water temperature in Celsius?

100 degrees Celsius.

What is the relationship between gravitational force and mass?

Gravitational force between bodies is greater if the bodies have greater mass.

What is pressure measured in?

Pascals or Kilopascals, PSI, Atm, mm Hg.

What is the concept of buoyant force?

The buoyant force on an object is greater when it displaces a larger volume of fluid.

What happens to pressure inside and outside the human head?

The pressure inside your head balances the pressure on the outside.

What is the law of reflection?

The angle of reflection is equal to the angle of incidence.

What is Ohm's Law?

The amount of current produced in a circuit is I = V/R.

What happens when an electron passes through a magnetic field?

Its direction will change due to the magnetic force acting on it.