fomulas

Question 1

What is the formula for speed?

Answer 1

speed = distance / time (v = s / t)

Question 2

What is the formula for average speed?

Answer 2

average speed = total distance / total time

Question 3

What is the formula for acceleration?

Answer 3

acceleration = change in velocity / time taken (a = Δv / Δt)

Question 4

What is the formula for gravitational field strength?

Answer 4

g = weight / mass (g = W / m)

Question 5

What is the formula for density?

Answer 5

density = mass / volume (ρ = m / V)

Question 6

What is the formula for resultant force?

Answer 6

resultant force = mass × acceleration (F = ma)

Question 7

What is the formula for spring constant?

Answer 7

spring constant = force / extension (k = F / x)

Question 8

What is the formula for moment of a force?

Answer 8

moment = force × perpendicular distance from the pivot

Question 9

What is the formula for momentum?

Answer 9

momentum = mass × velocity (p = mv)

Question 10

What is the formula for impulse?

Answer 10

impulse = force × time = change in momentum (FΔt = Δ(mv))

Question 11

What is the formula for kinetic energy?

Answer 11

Ek = ½mv²

Question 12

What is the formula for gravitational potential energy?

Answer 12

ΔEp = mgΔh

Question 13

What is the formula for work done?

Answer 13

work = force × distance (W = Fd)

Question 14

What is the formula for efficiency (energy)?

Answer 14

efficiency = (useful energy output / total energy input) × 100%

Question 15

What is the formula for efficiency (power)?

Answer 15

efficiency = (useful power output / total power input) × 100%

Question 16

What is the formula for power?

Answer 16

power = work done / time (P = W / t)

Question 17

What is the formula for power (energy ver.)?

Answer 17

power = energy transferred / time (P = ΔE / t)

Question 18

What is the formula for pressure?

Answer 18

pressure = force / area (p = F / A)

Question 19

What is the formula for hydrostatic pressure?

Answer 19

Δp = ρgΔh

Question 20

What is the formula for temperature in Kelvin?

Answer 20

T (K) = θ (°C) + 273

Question 21

What is the formula for specific heat capacity?

Answer 21

c = ΔE / (mΔθ)

Question 22

What is the formula for wave speed?

Answer 22

wave speed = frequency × wavelength (v = fλ)

Question 23

What is the formula for refractive index (angles)?

Answer 23

n = sin i / sin r

Question 24

What is the formula for refractive index (critical angle)?

Answer 24

n = 1 / sin c

Question 25

What is the formula for magnification?

Answer 25

magnification = image length / object length

Question 26

What is the formula for current?

Answer 26

I = Q / t (current = charge / time)

Question 27

What is the formula for potential difference?

Answer 27

V = W / Q (voltage = work done / charge)

Question 28

What is the formula for resistance?

Answer 28

R = V / I

Question 29

What is the formula for electrical power?

Answer 29

P = IV

Question 30

What is the formula for electrical energy?

Answer 30

E = IVt

Question 31

What is the transformer equation?

Answer 31

Vp / Vs = Np / Ns

Question 32

What is the orbital speed formula?

Answer 32

v = 2πr / T

Question 33

relation between refractive index and the speed of light?

Answer 33

n=c/v n= refractive index c= speed of light in vaccum v= speed of light in the medium