PHYSICAL SCIENCE PSC2121 Review

Vocabulary flashcards from the Physical Science PSC2121 review notes.

SI unit for mass

The symbol 'm' stands for meter in the International System of Units.

Unit of mass density

Kilograms per cubic meter (kg/m³) is a unit of mass density.

Definition of speed

Distance covered per unit of time.

Possible unit of acceleration

Meters per second squared (m/s²) is a possible unit of acceleration.

Freely falling object

A freely falling object has a uniformly increasing velocity due to the acceleration of gravity.

Net force from equal and opposite forces

The net force when two equal and opposite forces of 3.0 N act on an object is 0 N.

Effect of constant net force on an object

A constant net force acting on an object produces constant acceleration.

Unbalanced force on a mass of 10 kg with acceleration of 4 m/s²

The unbalanced force is 40 N.

Weight of a person on the Moon

If a person weighs 150 lb on Earth, their weight on the Moon would be approximately 93 N.

Unbalanced force for an 8 kg mass with 5 m/s² acceleration

The unbalanced force acting on the 8 kg mass is 40 N.

Speed after 4 seconds

The speed is calculated based on the acceleration and time.

Variable 'r' in gravitational equation

The variable r represents the straight-line distance between the centers of two masses.

Acceleration of a car moving at constant rate

If a car is moving at a constant rate of 20.0 m/s, its acceleration is zero.

SI unit of heat

The SI unit of heat is the joule.

Period of a wave with frequency of 9 Hz

The period is 1/9 seconds.

Prefix pico-

The prefix pico- stands for 10^-12.

Net charge of a system with electrons and protons

The net charge of a system with two electrons, two protons, and five neutrons is zero.

Unit of electric charge

One ampere multiplied by one second is a unit of electric charge.

Expression for electric power

Electric power is measured in joules per second (watts).

Electric power of a lamp carrying 2 A at 120 V

The electric power is 240 W.

Current drawn by lamps

The 100-W lamp draws more current than the 60-W lamp.

Average current through electroplating apparatus

The average current is 0.1 A.

Potential difference for current flow through resistance

A potential difference of 16 V is required for 2.0 A to flow through an 8.0 Ω resistance.

Power dissipated in a power line

The power dissipated in the line is 12,800 W.

Electric power definition

Electric power refers to joules per second or watts.