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1. ### a concave mirror has a curvature of 20 cm and a 1.5 cm object is placed 5 cm away from the mirror, where is the object ? (focal point etc)?

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

2. ### Physics Help VERY URGENT!!!!!!!!!!?

...  (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

3. ### Help me please with this physics question?

(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

4. ### Is the orbital speed required for weightlessness a constant for Earth no matter the altitude? ?

...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

5. ### 2 blocks (collision and separation) Simple harmonic motion?

... 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

6. ### Using Ohm’s Law, what is the current through a 10Ω resistor when a 5.0 V potential difference is applied across it?

v = ir i = v/r = 5/10 = 1/2 amp

1 Answers · Science & Mathematics · 11/01/2020

7. ### Physics Help?

Ohm's law: V = IR Then, R = V/I Resistance, R = (9.0 V) / (25 × 10⁻³ A) = 360 Ω

3 Answers · Science & Mathematics · 12/01/2020

8. ### Physics help?!?

...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

9. ### Physics......?

... 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

10. ### Phsics question with picture last one didnt work lol electric potential?

...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