Physics Homework Aid
Physics holds significant importance among the natural sciences, elucidating life's wonders and ranking among the most challenging subjects to master.
QuestionAI is a rich and user-friendly physics problem solver for novice physicists, enabling exploration of atomic properties and interactions, alongside molecular trajectories under various forces. Furthermore, you can delve into the mysteries concealed amidst galaxies with fellow physics enthusiasts. Boldly pose your conjectures and queries to the AI, and authoritative answers will readily emerge.
- What does the law of conservation of matter state? Matter can be created and destroyed Matter only exists in one form Matter can only be destroyed Matter can neither be created nor destroyed
- A.substance is heated at constant rate and its temperature is taken every minute During the heating, the substance undergoes one change of state The results are shown on the graph in Figure 5. Explain the shape of the graph in terms of the changes in the movement and arrangement of the particles as the substance is heated.
- Choose just one answer.a,b,cor d. A luminous object: a) reflects light b) refracts light c) gives off light d) diffracts light (1 mark) Which of these is an example of a transparent object? a) a brick b) a pane of glass c) a piece of wood d) a mirror (1 mark) We see lightning before we hear the thunder because: a) light waves are stronger than sound waves b) sound travels faster than light c) light travels faster than sound d) sound waves are stronger than light waves (1 mark) Answer all parts of all questions. 1 Fill in the missing words. We can see through a pane of glass because glass is a __ material We cannot see through a sheet of steel because steel is an __ material If we place an __ object in front of a source of light we can create a ........................ __ An object that emits light like a __ is called a __ object.We see __ __ objects because of the __ they reflect. Shadows have the same __ as the objects that create them.This suggests that __ travels in __ Light waves travel much __ than sound waves.This is why we always see lightning before we __ the __ (14 marks) 4 Arayof light strikes the surface of a plane mirror with an angle of incidence of 60^circ What is its angle of reflection? a) 30^circ b) 10^circ C) 90^circ d) 60^circ (1 mark) 5 An optical instrument that contains two mirrors and can be used to look over high walls is called a: a) kaleidoscope b) telescope c) microscope d) periscope (1 mark) Score ... 15
- Five points are connected by vectors. Not drawn accurately overrightarrow (FG)=2overrightarrow (EH) Work out overline (FE) in terms of a and b. [4 marks]
- Ethan made a diagram to compare examples of the first and second laws of thermodynamics. First Law of Second Law of Thermodynamics Thermodynamics square What belongs in the areas marked X and Y? X: The internal energy of a piston system increases as heat is added and rises to a cool area Y: As thermal energy is added to a container, some of the energy is lost to the environment X: As thermal energy is added to a container, some of the energy is lost to the environment Y: The internal energy of a piston system increases as heat is added and rises to a cool area X: A cold spoon placed in hot liquid gets warmer Y: Thermal energy is converted to light energy X: Thermal energy is converted to light energy Y: A cold spoon placed in hot liquid gets warmer