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focal point (distance from mirror) is: f =

**r**/2 = 10 cm given s = object distance from mirror s' = image distance from mirror...1 Answers · Science & Mathematics · 06/08/2019

... (d) What is the current through the resistor? I = E/

**R**= 5.8 v / 12.1 Ω = 0.479 A What is the current through...2 Answers · Science & Mathematics · 28/11/2019

(a) intensity = power / area of sphere = P / 4πR²

**R**= 3e8m/s * 3600s/h * 24h/day * 365day/yr * 40.3yr = 3.81e17 m P = 4.00e28 I...2 Answers · Science & Mathematics · 27/02/2019

...relationship between orbital speed and orbit radius in free fall follows from m g(

**r**) = m v^2 /**r**So v = sqrt( g**r**) Now g itself also depends...7 Answers · Science & Mathematics · 01/01/2020

... with the spring it goes in simple harmonic motion, derive an ex(p)ression fo(

**r**) the spring constant,k if the spring compresses a distance l (L for clarity...2 Answers · Science & Mathematics · 07/08/2019

v = ir i = v/

**r**= 5/10 = 1/2 amp1 Answers · Science & Mathematics · 11/01/2020

Ohm's law: V = IR Then,

**R**= V/I Resistance,**R**= (9.0 V) / (25 × 10⁻³ A) = 360 Ω3 Answers · Science & Mathematics · 12/01/2020

...why. eg When you close the switch would the current instantly become i = V/

**R**or not. Why? You should have the answers to both A and...1 Answers · Science & Mathematics · 21/02/2019

... and m₂ are the masses of the two objects in kg

**r**is the distance in meters between their centers g...2 Answers · Science & Mathematics · 01/11/2019

...from -2q to C = 3 units Potential is V = kq/

**r**. Potentials are scalars. To get total potential we simply...3 Answers · Science & Mathematics · 17/02/2019