A child holds up a silver spoon and is surprised to see her reflection there. Which interaction between light and matter explains this?
A.
When light hits something relatively flat, smooth, and shiny, it is transmitted by the surface, allowing nearby objects to be seen on the surface.
B.
When light hits something relatively flat, smooth, and shiny, it is refracted by the surface, allowing nearby objects to be seen on the surface.
C.
When light hits something relatively flat, smooth, and shiny, it bounces off the surface, allowing reflected objects to be seen on the surface.
D.
When light hits something relatively flat, smooth, and shiny, it is absorbed by the surface, allowing refracted objects to be seen on the surface.
Answers
Related Questions
Jenny puts a book on her desk. she lifts the book up with her finger, using a force of 0.5N .The cover is 10cm wide .calculate the turning moment on the cover of the book
When a space shuttle was launched, the astronauts aboard experienced and acceleration of 29.0 m/s. If one of the astronauts had a mass of 69.0 kg, what net force in newtons did the astronaut experience?
Which of the following has the lowest U value?a. plywoodb. poured concretec. expanded polyurethaned. asbestos shingles
Newton's laws of motion
Answers
IF all 4 pieces are the same length, then she ends up
in exactly the same place where she started, and her
displacement for the complete square walk is zero.
Answers
Mass is a measure of the amount of matter contained by an object, while weight is a measure of the gravitational pull on an object. As the gravitational force exerted by Earth is the constant upon which mass is calculated, the values of an object's mass and weight on Earth are approximately equal depending on geographic location.
Rock 1000 0.5
Pillow 200 10
Bottle of soda 2000 2
Loaf of bread 100 1
Answers
Answer:
The densest materials are rock and bottle of soda.
Explanation:
The density of material is given by,
Density =
Case 1: Rock
Density =
Density = 2000
Case 2: Pillow
Density =
Density = 20
Case 3: Bottle of soda
Density =
Density = 1000
Case 4: Load of bread
Density =
Density = 100
The densest materials are rock and bottle of soda.
Answers
Convention occurs when the substance being heated begins a cycle of cooling and heating. the heat goes to the opposite side of which the substance is being heated and the substance is cooled on the corresponding side, this cycle continues until the heat source is extinguished.
Radiation occurs when the heat of a substance is being transferred via gas form. Ex: sunburn.
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Explanation :
Any object that is thrown in space that moves under the action of gravity is known as a projectile. Every object in the universe comes down due to gravitational force.
When a soccer ball is headed from the player 1 to player 2 across the soccer field, the soccer ball will act like a projectile.
In projectile motion, we can calculate certain parameters like
- Time of flight
- Range of projectile
- Maximum height
In apex the answer is "soccer ball"
Answers
Well, we usually assume that the resistance of a circuit component
is constant and doesn't change. But the truth is that for anything
that conducts current, its resistance always increases somewhat
when it warms up.
For things like light bulbs, electric toasters, space heaters, electric
stove burners, the heat coils in a blow-dryer ... anything that's
designed to be really hot when it's doing its job ... the resistance
of those things increases significantly when they come up to their
operating temperatures.
Hello user!
here is it answer.....
Because the lamp filament is physically very small and dissipates a relatively large amount of power (say, 60W for a typical incandescent bulb), while the conductors which feed it are relatively large and of negligible resistance, so they dissipate very little power, for a relatively large conductor area. How hot a component gets from resistive heating is proportional to its power dissipation, and inversely proportional to its area/size.
Thus if you dissipate, say 60W of power in a tiny lamp filament, it will get hot enough to become (surprise !!) incandescent, while the conductors which supply it (which dissipate perhaps a fraction of a watt for many feet of conductor length) will experience no significant temperature rise.
In fact, applicable electrical codes mandate that circuit conductors be sized large enough and provided with appropriate overcurrent protection, so that no significant conductor heating can take place.