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1. ### An object 3.99 cm high is placed 24.7 cm from a convex mirror having a focal length of −6.52 cm.?

... Mirror Equation: 1/f = 1/do + 1/di Where f= the focal length, do = the...1.43cm Magnification = hi/ho = - di / do Magnification = 1.43cm / 3.99cm = - (8.86cm)/ (24.7cm) Magnification...

2 Answers · Science & Mathematics · 17/04/2014

2. ### A man jogs at a speed of .99 m/s. His dog waits 1.6s and then takes off running at a speed of 3.3 m/s to ...?

...3 * (t - 1.6) >>> dog took less time d (dog) = d (man) 3.3 * (t - 1.6) = 0.99*t 3.3 t - 5.28 = 0.99 t 2.31 t = 5.28 t = 2.286 s d = 0.99*2.286 = 2.011...

1 Answers · Science & Mathematics · 07/02/2008

3. ### A 1.61x10+3 kg race car can go from zero to 1500 m/s in 4.99 s.?

...4.99 (meters per second per second = m/s^2) Force = 1.61x10+3 x 1500 / 4.99 = 484x10+3 Newtons Power = Force x Velocity so...

2 Answers · Science & Mathematics · 30/05/2011

4. ### At what frequency f do a 1.0 micro F capacitor and a 1.0 micro-Henry inductor have the same reactance?

...f^2 = 1/(4π^2 * L * C ) f = √(1/(4π^2 * 1 x 10^-6 * 1 x 10^-6)) = 159.154 kHz b)XL = 2π * f * L = 0.99 ohms XC = XL = 0.99 ohms

2 Answers · Science & Mathematics · 16/07/2011

5. ### If you are going on a train at 99% of speed of light does the train get 7 times smaller relative to me?

... on the train, and the train is moving at 99% of the speed of light relative to you, and it is .... I agree that it would be approximately 1/7 as long as it would be when stationary next to you.

1 Answers · Science & Mathematics · 26/11/2012

6. ### If a quarter coin was to hit the earth at 99.9% speed of light what kind of damage would it do?

♠ lets calculate! The mass of relativistic coin would be m= m0/(1-(v/c)^2) =m0/√(1-0.999^2) =m0*22.4, where m0 is mass of a non-relativistic...

7 Answers · Science & Mathematics · 12/06/2007

7. ### Why does the nucleus account for 99.99% of the mass of an atom?

Nucleus made up of protons and neutrons which each have a relative mass of 1. Electrons have a relative mass of like 1/1820 so near enough 0.

2 Answers · Science & Mathematics · 31/12/2012

8. ### radon is a radioactive gas with a half-life of 3.6 days. how long does it take for 99% of a sample to decay?

...original decay formula becomes, A = Ao(e^-0.19254t) If 99% of the sample will decay, it means that A = 1% of Ao, hence your formula will be 0.01Ao = Ao(e^-(0...

2 Answers · Science & Mathematics · 30/06/2008

9. ### In a variation of Schroedingers cat expt, what happens if the odds of the cat living are say 100 to 1?

No. There is actually a continuum of worlds in MWI with different parts being more or less correlated, not a discrete integer number as you imply. The idea of us being in a discrete world is illusory since the...

5 Answers · Science & Mathematics · 31/05/2007

10. ### How do I solve this problem?

Bill has done most of the work. You can however solve the equations in a much simpler manner. Given 0.99 / r^2 = 1 / (r+h)^2 then (r+h)^2 / r^2 = 1 / 0.99 (r+h) / r = 1 + h/r = 1 / sqrt(0.99...

3 Answers · Science & Mathematics · 27/06/2009