Law's

Question 1

What is Boyle’s law?

Answer 1

For a fixed mass of gas, at constant temperature and pressure, the pressure is inversely proportional to the volume. P ∝ 1/V

Question 2

What is Charles’ law?

Answer 2

For a fixed mass of gas, at a constant temperature and pressure, the volume is directly proportional to the temperature (in kelvin). V ∝ T (in K) x K - the constant

Question 3

Coulombs law?

Answer 3

Any two point charges exert an electrostatic force on each other - it is directly proportional to the product of their charges and inversely proportional to the square of their separation

Question 4

Faradays law?

Answer 4

The magnitude of the induced EMF is directly proportional to the rate of change of magnetic flux

Question 5

Hookes law?

Answer 5

The force applied is directly proportional to the extension of the spring unless the limit of proportionality is exceeded

Question 6

Archimedes principle?

Answer 6

The upthrust exerted on a body immersed in a fluid (fully or partially), is equal to the weight of the fluid that the body displaces

Question 7

The seven base units?

Answer 7

metre, kilogram, second, ampere, kelvin, mole

Question 8

Factor for P?

Answer 8

x10^15

Question 9

Factor for T?

Answer 9

x10^12

Question 10

Factor for G?

Answer 10

x10^9

Question 11

Factor for M?

Answer 11

x10^6

Question 12

Factor for k?

Answer 12

x10^3

Question 13

Factor for d?

Answer 13

x10^-1

Question 14

Factor for c?

Answer 14

x10^-2

Question 15

Factor for m?

Answer 15

x10^-3

Question 16

Factor for weird u/micro?

Answer 16

x10^-6

Question 17

Factor for n?

Answer 17

x10^-9

Question 18

Factor for p?

Answer 18

x10^-12

Question 19

Factor for f?

Answer 19

x10^-15

Question 20

Force in SI units?

Answer 20

kgms^-2

Question 21

Pressure regular symbol and then SI?

Answer 21

Pa and Nm^-2

Question 22

Energy or work done symbol and then SI?

Answer 22

J and Nm

Question 23

What equation relates energy and power?

Answer 23

Power = Energy/time

Question 24

Symbol for power and SI unit?

Answer 24

W and Js^-1

Question 25

Frequency SI units?

Answer 25

s^-1

Question 26

Momentum SI units?

Answer 26

kgms^-1

Question 27

How to go from degrees to kelvin?

Answer 27

+273

Question 28

Blue shifted?

Answer 28

If a galaxy is moving towards earth, absorption lines move towards the blue end of the spectrum (as wavelength appears shorter - compressed), red shift is the opposite

Question 29

Hubbles law?

Answer 29

The recessional speed (v) of a galaxy is almost directly proportional to its distance from earth (d) - V = humbles constant x d

Question 30

Newton’s law of gravitation?

Answer 30

The force between two point masses is directly proportional to the product of the masses and inversely proportional to the square of their separation

Question 31

Kepler’s 1st law?

Answer 31

The orbit of a planet is an ellipse with the sun at one of the two foci

Question 32

Kepler’s 2nd law?

Answer 32

A line segment joining a planet and the sun sweeps out equal areas during equal intervals time

Question 33

Kepler’s 3rd law?

Answer 33

The square of the orbital period T of a planet is directly proportional to the cube of its average distance r from the sun

Question 34

What makes an orbit geostationary?

Answer 34

Has to orbit above the earths equator
have an orbital period of 24 hours
rotate in same direction as earths rotation

Question 35

Cosmological principle?

Answer 35

That the universe is homogenous and isotropic

Question 36

Homogenous?

Answer 36

Matter is distributed uniformly across the universe

Question 37

Isotropic?

Answer 37

It looks the same in all directions