Physical Science final

Front

What is the Kelvin scale?

Back

The Kelvin scale is a temperature scale that starts at absolute zero, where all molecular motion stops. It is used in scientific contexts and is based on the properties of gases.

Front

How do you convert Celsius to Kelvin?

Back

To convert Celsius to Kelvin, add 273.15 to the Celsius temperature. For example, 30°C = 30 + 273.15 = 303.15K.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It can occur due to a change in speed or direction.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What is force?

Back

Force is an interaction that causes an object to change its velocity, direction, or shape. It is measured in Newtons (N).

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

What is displacement?

Back

Displacement is the shortest distance from the initial to the final position of an object, taking direction into account.

Front

What is work in physics?

Back

Work is done when a force causes an object to move. It is calculated as the product of force and displacement in the direction of the force.

Front

How do you calculate work?

Back

Work (W) is calculated using the formula: W = F × d, where F is the force applied and d is the distance moved in the direction of the force.

Front

What is the formula for calculating gravitational potential energy?

Back

Gravitational potential energy (PE) is calculated using the formula: PE = m × g × h, where m is mass, g is the acceleration due to gravity (9.81 m/s²), and h is height.