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1. ### A jet is flying at a speed of 356 m/s in an air temperature of 25 C. What is the Mach number of the jet?

...286 m²/s²/K for air T = absolute temperature (273.15 K + °C) = 298.15 K v(s) = speed of sound = to be determined v...

3 Answers · Science & Mathematics · 24/08/2019

2. ### suppose the position of a particle is i+3j-2k at t=2pi/3 sec, and suppose the particles velocity at any time t is v(t)=2sin(t)i+2cos(t)j+tk?

...2sin(t) i + 2cos(t) j + t k] dt = -2cos(t) i + 2sin(t) j + ½t² k + C We're told that s(2π/3) = i + 3 j - 2 k, and so i + 3 j...

1 Answers · Science & Mathematics · 29/06/2019

3. ### PHYSICS PLEASE HELP! PARTS B, C, D, AND E!?

...the diagram, i.e. the -z direction. So the torque is -LTcosθ k. ________________________ C) |τ₁| = 9.1*399*cos(21°) = 3390 Nm to 3 sig. figs...

2 Answers · Science & Mathematics · 23/06/2019

4. ### Physics problem!!?

The surplus of energy stored in the hotter body is received by the other , so that while one decreases its own temperature, the other increases by the same amount, being the two bodies equal in mass and material . ΔE = m*c...

1 Answers · Science & Mathematics · 18/04/2019

5. ### Physics homework. Help is greatly appreciated?

F = k * C * C / r^2 https://en.wikipedia.org/wiki/Coulomb%27s_law...

2 Answers · Science & Mathematics · 14/02/2019

6. ### Solve the differential equation (for v as a function of t)?

... for v: kv + mg = Ce^(-k/m t) kv = -mg + Ce^(-k/m t) v = -mg/k + C/k e^(-k/m t)

1 Answers · Science & Mathematics · 07/04/2018

7. ### Two loudspeakers are 1 meter apart. A person stands 12 meters directly in front of one of the speakers.?

... wavelength is ratio of speed of sound and frequency, λ = c/f 0.0415 m = k * c/f f = k*c / 0.0415 m We see smallest frequency occurs when k...

1 Answers · Science & Mathematics · 30/01/2018

8. ### Plasma angular frequency question?

frequency for k->0 wave: wp. This is the lowest frequency. v_phase = w/k = c sqrt( 1 + wp^2/(ck)^2 ) v_group = dw/dk = c / sqrt( 1 + wp^2 / (c^2 k^2))

1 Answers · Science & Mathematics · 18/12/2017

9. ### Physics help please?

.../r^2 0.5mv^2 = -C/r + K v = 0 at r = 1.2 x 10^11 K = C/1.2 x 10^11 at r= infinity v = 3 x 10^7 0.5(4.5 x 10^4)(3 x10^7)^2 = C...

2 Answers · Science & Mathematics · 03/12/2017

10. ### Can we change time?

...by dt = dT sqrt(1 – (v/c)^2); where v is the speed of k relative to K. c is the speed of light in a vacuum; also relative to K. The general...

4 Answers · Science & Mathematics · 06/11/2017