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1. ### Physics Question?

2h = g*t^2 g = 2h/t^2 = 10.7/2.55^2 = 1.646 m/sec^2 = M*G/r^2 (G = 6.674*10^-11) M = g*r^2/G = 1.646*5.25^2*10^12*10^11/6.674 = 6.80*10^23 kg

4 Answers · Science & Mathematics · 17/01/2020

2. ### A long, solid rod 5.7 cm in radius carries a uniform volume charge density?

I think we can use field E = λ / 2πrε₀ to find the linear charge density 20e3 N/C = λ / (2π*0.057m...

1 Answers · Science & Mathematics · 16/01/2020

3. ### A proton is at the origin and an electron is at the point x = 0.35 nm, y = 0.31 nm?

...nm = 3.50E-10 m y = y-coordinate of electron = 0.31 nm = 3.10E-10 m r = distance between proton and electron = to be determined r² = x²...

1 Answers · Science & Mathematics · 10/01/2020

4. ### An airplane is flying in a horizontal circle at a speed of 103 m/s.?

(B) mv^2/r = m*6.45*g = (73.0 kg)(9.81 m/s^2)(6.45) = Around 4500 N but use a calculator. (A) v^2/r <= 6.45*g => r >= v^2/(6.45*g) = (103 m/s)^2/(6.45*9.81 m/s^2) = around 15m but use a calculator.

1 Answers · Science & Mathematics · 12/12/2019

5. ### Physics Help!?

...acceleration of the outer edge of the disk? α = angular acceleration = 2 rad/s² r = radius = 0.5 m at = tangential acceleration = to be determined at = αr at...

3 Answers · Science & Mathematics · 16/12/2019

6. ### A block of mass m=1.17kg is tied to a string and swings around in a vertical circle of radius R=1.60m.?

...  88.2 - 11.48 = 76.72 N Centripetal force is mv^2/r (76.72×1.6/1.17)^.5 = velocity = 10.24 m/s Update if you need more, and...

1 Answers · Science & Mathematics · 07/12/2019

7. ### How do i find density of air used in a heave motion compensator? Do i need any special formula or i use the formula for density of dry air?

Air is pretty close to an ideal gas but you are getting up there in pressure. calculate the density using the ideal gas equation and then check it other published data. https://www.engineeringtoolbox.com/air-temperature-pressure-density-d_771.html this looks like about 240 kg/m^3...

2 Answers · Science & Mathematics · 09/12/2019

8. ### What is the potential difference between points a and b? ?

...18v*0.5A = 25W Consumed by resistance P = i²*R: 1²*4Ω+(1/2)²*12+(1.5)²*8 = 25W ...

2 Answers · Science & Mathematics · 06/12/2019

9. ### Physic - Calculate the speed of the bicycle, force accelerating the bicycle and the mean force?

.../rot = 4π rad/s, ω_w = 1.3*4π rad/s = 16.3 rad/s and so v_w = ω_w * R_w = 16.3rad/s * 0.35m = 5.7 m/s ◄ 2. From s = ½at² we...

1 Answers · Science & Mathematics · 01/12/2019

10. ### How fast would a golf ball fall if dropped from an airplane? In MPH. How long to reach that speed?

... the drag coeff (0.5 for a sphere) A the cross-section area PI*r^2 in m^2 ρa the density of air equal to 1.25 kg/m^3 V the speed in m/sec...

3 Answers · Science & Mathematics · 29/11/2019