Lecture 1: Basics Of Physics STUDY GUIDE FOR QUIZ Flashcards
What is the difference between mass and weight?
Mass is the amount of matter in an object.
Weight is the force of gravity on an object.
Velocity is a ___
Vector
What do vectors have?
Both magnitude and direction
Scalar quantities have ___
Magnitude only
Examples: weight, height, distance
Velocity infers that there was…
A change in position
Total displacement of an object is 0 when…
The object returns back to the original position where it started
Acceleration is a ___
Vector, because it describes how velocity changes with each second in time.
Acceleration is measured in…
Meters/second^2
A force is…
A push or a pull
Force of gravity =
9.8m/s^2
Pressure =
Force/area
How do you increase pressure?
Increase force or decrease area
How do you decrease pressure?
Decrease force or increase area
What is the effect of doubling the diameter of a syringe on the pressure within?
If you double the diameter of the syringe, you decrease the pressure by a factor of 4.
What does it mean if the reading on the bourdon gauge is 0?
There is still pressure in the tank–atmospheric pressure (14 psi)
What is work?
Work = force X displacement (distance)
-If there’s no force, there’s no work; if there’s no displacement, there’s no work
What is work measured in?
Joules
What is kinetic energy?
Energy of mass in motion
What is internal energy?
The sum of all kinetic and potential energies in a system
What is energy?
The capacity to do work
What is energy measured in?
Joules
What are 3 state functions?
- Temperature
- Pressure
- Volume
Calories
Big C = calories in the food that we eat (kilocalories, 1000 calories)
What is potential energy?
Stored energy
Examples: calories that we eat, electricity in batteries
Zeroth law of thermodynamics
If [temperature] A = B and B = C, then A = C
Energy moves from ___ to ___
Hot to cold
