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1. Help with some physics problems?

...velocity of the arrow as it leaves the bow? The work that is done by the bow is equal the kinetic energy of the arrow. Work = ½ * 275 * 0.85^2 = 99.34375 KE = ½ * 0.125 * v^2 = 0.0625 * v^2 v = √(99.34375 ÷ 0...

2 Answers · Science & Mathematics · 11/11/2017

2. Why does it take longer than 6 seconds to reach terminal velocity?

... you never reach terminal velcoity! But you could get within (say) 99% of it, or (say) 99.999999% of it - depending how long you fall for. We...

6 Answers · Science & Mathematics · 19/10/2017

3. What does a trimmer resistor do?

...adjust the whole resistance within fine tolerances. eg if I had a 1 ohm potentiometer in series with a 99.5 ohm resistor then I could vary the resistance from 99.5 up to 100.5 using...

2 Answers · Science & Mathematics · 05/10/2017

...sin19.0°) ± √[(7.03 sin19.0°)² + 4(1/2)(9.81)(24/0)]} / [2(1/2)(9.81)] t = 1.99 s or t = -2.46 s (rejected) Time taken = 1.99 s (b) ...

3 Answers · Science & Mathematics · 24/09/2017

5. Quick Physics Question, need direction?

..., where kₑ is Coulomb's constant (kₑ = 8.99×10⁹ N m² C⁻²) q₁ and q₂...

1 Answers · Science & Mathematics · 08/09/2017

6. Explain where most of the mass of an atom is located. Also,explain y some particles that make up the atom do not contribute much to its mass?

... of 3 quarks each. However, the quarks represent only 1% of the mass of a proton or neutron. The rest of the mass (99%) comes from the binding energy of the gluons of the strong nuclear...

2 Answers · Science & Mathematics · 04/08/2017

7. How much work is required to accelerate a 1440 kg cylinder from rest to 1.00 revolution per second?

...1 rev/s = 2π rad/s The work done will equal the kinetic energy gained: W = ½Iω² = ½ * 4.05*10⁴ * (2π)² = 7.99*10⁵ J If ...

1 Answers · Science & Mathematics · 10/04/2017

8. physics: how to calculate electric field at a given point?

I'll just use different values to illustrat the method. ______________________________________ Find the magnitude of the electric field at a point midway between two charges qA = +50e−9 C and qB = +70e−9 C separated by a distance of 20cm. qA...

2 Answers · Science & Mathematics · 01/04/2017

9. Physics: 2D collision?

... v = √(8.99² + 1.97²) v = 9.2 m/s at an angle of tanθ = -1.97 / 8.99 θ = -12.364° I don't know how that is supposed to round...

2 Answers · Science & Mathematics · 15/03/2017

...solve for V4 0.023(270) + 0 = 0.023(140) + 3.0 V4 3.0 V4 = 2.99 V4 = 1.0 m/s to 2 sig figs When you get a good response, please consider...

2 Answers · Science & Mathematics · 07/03/2017