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related to: Need+for+Speed

1. ### Physics question: What is the height from which a car of mass m = 1350 kg must be dropped in order to acquire a speed v = 100km/h?

I so wanted to answer this question. However, my answer is "Anonymous" as your post is Anonymous. There is no need for an Anonymous question in this category,

1 Answers · Science & Mathematics · 22/11/2020

2. ### Some Physics HW :)?

First up... don't forget to choose a  BEST  answer... !! speed , that is tangential velocity,  v,   is  :          v =  ( 2πr ) * ( # rev )  /  t All the objects have the  same  value for   2πr,  just convert   r  to meters instead of cm before  any calculations...

1 Answers · Science & Mathematics · 09/11/2020

3. ### I need help with physics. I don't understand what I'm suppose to do?

...39;d say velocity, because it is squared. But one could argue for radius, because it's in the denominator (and so small radii lead to big ...

1 Answers · Science & Mathematics · 10/11/2020

4. ### Modern Physics Question?

The cooled atoms have nothing to do with the answer. If you've calculated photons per second (and remember that µW = µJ/s), then you're done. photons/s = power (J/s) / energy per photon (J...

1 Answers · Science & Mathematics · 06/11/2020

5. ### Physics help?

mg tanθ = mv²/r v²= r/m * mg tanθ, but mass cancels v = √(rg tanθ) v = √140*9.80665 * 0.3249 = 21.1m/s  ((76.0 kph)) Your answer is correct except for missing units.

2 Answers · Science & Mathematics · 31/10/2020

6. ### HELP WITH PHYSICS?

...vertical component = 26sin22 = 9.7 m/s (b) time, t = horizontal distance / horizontal component of speed = 27.4/24 = 1.1 s (c) ball's height, s = ut+½gt² ...where u...

1 Answers · Science & Mathematics · 27/10/2020

7. ### Red light has a wavelength of 650 nm. Green light has a wavelength of 550 nm. The speed of light is 3×108 m/s?

... 2. f = 3e8m/s / 550e-9m = 5.45e14 Hz (or s^-1) 3. Doppler for stationary source: f = f₀ * (c+v)/c 5.45 = 4.62*(3e8 + v) / 3e8 ignoring...

1 Answers · Science & Mathematics · 27/10/2020

8. ### If time stops, would the laws physics and biology still apply?

...anything with a fist or whatever. Same problem. Yes, your body would need food and water at an accelerated rate... but ***not from your perspective...

3 Answers · Science & Mathematics · 26/10/2020

9. ### I need help with 2 questions?

...      τ = torque in N•m   τ = αI torque required for that accel.   P = τω power to hold that speed with τ friction   θ = θ₀ + ω₀t + ½αt²...

1 Answers · Science & Mathematics · 26/10/2020

10. ### Phys help?

...½*0.906rev/s²*(0.193s)² = 0.0748 revs C. For speeds , we need to convert the angular velocities to rads: v_t = 0.475*2π rad/s...

2 Answers · Science & Mathematics · 31/10/2020