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1. A short current element dl = (0.500 mm)j carries a current of 5.40 A in the same direction as dl.?

How about awarding for this working? https://answers.yahoo.com/question/index?qid=20200320170944AAsCuWt And here would be nice, although I made an error which I explained in the comments: https...

1 Answers · Science & Mathematics · 01/04/2020

2. Ordinary differential equation..?

mass of ball m = 98N / 9.8m/s² = 10 kg spring constant k = F/x = 98N / 1.09m = 89.9 kg/s² First you must find...

2 Answers · Science & Mathematics · 22/03/2020

3. You connect a battery, resistor, and capacitor as in (Figure 1), where E = 51.0 V, C = 5.00 μF, and R= 110 Ω. The switch S is closed at t= 0?

T = R*C = 5.0 *110 =  0.55 msec  8/51 = 1-e^-k 43/51 = e^-k k = -ln 43/51 = 0.1706 = t/T t = T*0.1706 = 94 μ sec

1 Answers · Science & Mathematics · 10/03/2020

4. A 129 N object vibrates with a period of 4.65 s when hanging from a spring. Answer in units of N/m.?

ω = 2πf but T = 1/f so ω = 2π/T = √(k/m) 4π²/4.65² = k/m so  m*4π²/4.65² = k m = (129/9.81) so (129/9.81)*4π²/4.65² = k = 24 <<<<

3 Answers · Science & Mathematics · 09/03/2020

5. Two charges separated by 1 m exert a 1.0-N force on each other. If the charges are pushed to 0.25-m separation?

Yes, use the equation for the Coulomb force: F = k*Q*q / d² so k*Q*q = F*d² and this is...

2 Answers · Science & Mathematics · 05/03/2020

6. Physics Question?

A) just conservation of momentum 2.03kg * 1.30m/s = (2.03 + 1.83)kg * V V = 0.684 m/s √√√ agreed B) initial KE = ½ * 2.03kg * (1.30m/s)² = 1.72 J final KE = ½ * 3.86kg * (0.684m/s)² = 0.902 J and so the change...

1 Answers · Science & Mathematics · 27/02/2020

7. A balloon rubbed against denim gains a charge of −6.0 µC.?

... one charge and also you should have used the given value of k in the question (8.98755 × 10^9 ·m² /C²) (even though this precision ...

1 Answers · Science & Mathematics · 09/02/2020

8. What is the capacitance of two metal plates each of area 0.96 m^2 and separated by 0.5 mm using aluminum oxide as the material?

C = k*e*A/d, where C = capacitance in Farads k = relative permittivity e...

1 Answers · Science & Mathematics · 08/02/2020

9. Physics 2 question?

... at a distance r is given by Vₑ = kQ/r, where k is the Coulomb constant: 8.99 × 10⁹ N·m²/C²...

2 Answers · Science & Mathematics · 07/02/2020

10. What is the electric potential 14.0 cm from a 3.00 μC point charge?

V = k(3µ)/0.14 = 193000 volts Potential from a charge is V = kQ/r in volts    k = 1/4πε₀ = 8.99e9 Nm²/C²    r is separation in ...

1 Answers · Science & Mathematics · 09/02/2020