General Flashcards
Newton’s 1st law?
objects with balanced forces acting on them will remain in constant motion or remain at rest
Newton’s 2nd law?
F=ma
Newton’s 3rd law?
for every action there is an equal and opposite reaction
As you go down the wave spectrum….
wavelength decreases
frequency increases
they have higher energy
D. Defraction?
when q wave passes through a small gap and bends
D. Refraction?
When a wave passes from one medium into another medium of a different density, and changes direction slightly
Angle of incidence =…
angle of reflection
P waves?
primary waves, longitudinal, go through solids and liquids
S waves?
secondary waves, transverse, only travel through solids
Convex lens…. (4)
- real image
- corrects longsightedness
- upside-down image
- magnifies
Concave lens…. (4)
- corrects shortsightedness
- virtual image
- upright
- smaller
Visible light spectrum?
red orange yellow green blue indigo violet
As you go down the visible light spectrum….
wavelength decreases
frequency increases
Black body?
perfectly absorbs all radiation that hits it
Transformer equations? (2)
Vs x Is = Vp x Ip
Vp/Vs = turns P/turns S
Generator effect?
passing a wire through magnetic field lines to generate a current
Planet order?
My Very Easy Method Just Speeds Up Naming
Sun = …. generation star?
second - because contains heavy elements (eg iron) so must have formed from dust and gas left over from supernova
D. Satellite?
anything orbiting the Earth
Red shift?
increase in wavelengths of light coming from starts = moving further away
Blue shift?
decreasing wavelength of light coming from stars = getting closer
How does red-shift give evidence for big bang?
shows how planets were all in one place a long time ago
