Recent content by European Sens

Does my logic seem correct. Please lead me in the right direction. Thanks once again.

well train # 1 is going 29 m/s and train # 2 is going 15.6 m/s in opposite directions... that I know. So do I add 29 + 15.6 to get 44.6 m/s away from each other... which when plugged in is: f' = [350*343] / [343+44.6] = 309.72 Please advice. Thank you.

There are two questions here: 1st is... The velocity of sound in air is 343 m/s. A train moving away from a detector at 29 m/s blows a 350 Hz horn. What frequency is detected by a stationary train? I got the correct answer of 322.7 using dopplers equation. Now part 2 is... What...

Okay. That was very helpful. I got the answer of 313.03. I submitted online and it is correct. Thanks!

I don't really know much about it. f' = f [(v+v1)/(v-v2)] that's the equation. could you please walk me through this problem.

Could someone possibly walk me through this. Sound a little more difficult than I'm used to.

Homework Statement A helicopter drops a paratrooper carrying a siren that emits a 788 Hz audible signal. The microphone (reciever) on the plane monitors the signal from the transmitter as the paratrooper falls. Take the speed of sound in air to be 343 m/s and assume the paratroopers always...

Could you explain this further?

ok i think its 100,000 Pascals. When I plug everything in I get 447.2 Somehow that doesn't seem correct though

So... pressure + 1/2 * density * velocity^2 + density * acceleration * elevation = constant I believe that density crosses out. One question is what is the pressure equal to?

**Below is the question. No need to solve it for me. Providing me with an equation would be fine. Thanks** A dairy farmer notices that a circular water trough near the barn has become rusty and now has a hole near the base. The hole is 0.14 m below the level of the water that is in the tank...

Homework Statement A rubber balloon is rubbed against a wall and then sticks to the wall. This is because 2. multiple choice a. the balloon and the wall exchange charges through contact b. electrons hop back and forth between the balloon and the wall c. the balloon induces an...

so i was correct?

Homework Statement what will happen to the electric potential energy of a charged particle in an electric field when the particle is released and free to move? 2. multiple choice a. it will increase b. it will change into kinetic energy c. it will remain unchanged The Attempt...

Believe it or not, it should read 60. I had to recheck that myself. So dropping the q2 should give us: [k*q1] / r^2 Since both charges are negative, I would guess that they would repel one another and face in opposite directions outward. I don't know whether to add or subtract the...