# Yahoo Web Search

1. Sort by

1. ### Air resistance acting on a falling body can be taken into account by the approximate relation for the acceleration:?

a=dv/dt=g-kv. Put y=g-kv. dy/dt= - k dvdt=-ky dy/dt= -k, y=y0 exp (-kt). This gives g-kv= y0 exp(-kt) kv...

2 Answers · Science & Mathematics · 11/02/2019

2. ### In acetylene, C-H stretch occurs about 3300 cm-1. Estimate the position of a C-T stretch.?

From ω=√︎(k/μ) you see that you have to assess how μ changes from CH to CT...

1 Answers · Science & Mathematics · 13/09/2019

3. ### A box of books weighing 347 N is shoved across the floor by a force of 492 N exerted downward at an angle of 31◦below the hori-zontal.?

... + 492N*sin31º = 600 N friction force f = µk*Fn = 0.59 * 600N = 354 N net horizontal force Fnet = ...

1 Answers · Science & Mathematics · 28/05/2019

4. ### At each corner of a square of side there are point charges of magnitude Q, 2Q, 3Q, and 4Q (Figure 1).?

From Q, the force = k* Q*2Q/L² at 0° From 4Q, the force = k*...

1 Answers · Science & Mathematics · 02/05/2019

5. ### Find (a) the magnitude and (b) the direction of the net electric field at the origin.?

field E = vector Σ kQ / d² where k = 8.99e9 N·m²/C² x-direction: The two charges on the...

1 Answers · Science & Mathematics · 10/09/2019

6. ### Thermal Conduction Quantified- Physics?

... many kinds of plywood. I found this, 0.13 W/m•K but that may not match your number. 58-cm2 ?? guessing that thus...

1 Answers · Science & Mathematics · 12/02/2019

7. ### In general, astronomical objects are not exactly electrically neutral. Suppose the Earth and the Moon each carry a charge of –1.27·106 C.?

Coulomb's law: F = k.q1.q2 /r² Newton's gravitational: Fn = G.m1.m2...

2 Answers · Science & Mathematics · 05/09/2019

8. ### 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?

...position s(t) = ∫ v(t) dt s(t) = ∫ [2sin(t) i + 2cos(t) j + t k] dt = -2cos(t) i + 2sin(t) j + ½t² k + C...] and so unit T(t) = [2sin(t) i + 2cos(t) j + t k] / √[4 + t²] d) the tangential component of the acceleration...

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

9. ### Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.119 N...?

electrostatic force F = kQq / d² where k = 8.99e9 N·m²/C² first condition: -0.119 N = 8....

2 Answers · Science & Mathematics · 05/09/2019

10. ### A daredevil wishes to bungee-jump from a hot-air balloon 70.5 m above a carnival midway.?

...the event. from the preliminary test, we can find the spring constant k by summing forces to zero. kx - mg = 0 kx = mg...by the cord at max stretch is F = kx F = (k'/25.1)(30.4) F = (5(mg/1.65)/25.1)(30.4) F...

4 Answers · Science & Mathematics · 07/10/2019