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Flashcards in General Deck (22)
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1

Newton's 1st law?

objects with balanced forces acting on them will remain in constant motion or remain at rest

2

Newton's 2nd law?

F=ma

3

Newton's 3rd law?

for every action there is an equal and opposite reaction

4

As you go down the wave spectrum....

wavelength decreases
frequency increases
they have higher energy

5

D. Defraction?

when q wave passes through a small gap and bends

6

D. Refraction?

When a wave passes from one medium into another medium of a different density, and changes direction slightly

7

Angle of incidence =...

angle of reflection

8

P waves?

primary waves, longitudinal, go through solids and liquids

9

S waves?

secondary waves, transverse, only travel through solids

10

Convex lens.... (4)

- real image
- corrects longsightedness
- upside-down image
- magnifies

11

Concave lens.... (4)

- corrects shortsightedness
- virtual image
- upright
- smaller

12

Visible light spectrum?

red
orange
yellow
green
blue
indigo
violet

13

As you go down the visible light spectrum....

wavelength decreases
frequency increases

14

Black body?

perfectly absorbs all radiation that hits it

15

Transformer equations? (2)

Vs x Is = Vp x Ip

Vp/Vs = turns P/turns S

16

Generator effect?

passing a wire through magnetic field lines to generate a current

17

Planet order?

My
Very
Easy
Method
Just
Speeds
Up
Naming

18

Sun = .... generation star?

second - because contains heavy elements (eg iron) so must have formed from dust and gas left over from supernova

19

D. Satellite?

anything orbiting the Earth

20

Red shift?

increase in wavelengths of light coming from starts = moving further away

21

Blue shift?

decreasing wavelength of light coming from stars = getting closer

22

How does red-shift give evidence for big bang?

shows how planets were all in one place a long time ago