Recent content by NeRdHeRd

Homework Statement A pressure measurement system uses a sensor that converts pressure into voltage according to the transfer function, Vp = (.5)(square root of P). This voltage is then converted into a current. As pressure varies from 0 - 100 psi, the current varies from 4 - 20 mA. A. Find...

Homework Statement A string with a length of 2.5m has two adjacent resonances at frequencies 112 Hz and 140 Hz. Determine the fundamental frequency of the string? A. 14 Hz B. 28 Hz C. 42 Hz D. 56...

The cancel each other because they are pointing in opposite directions. Which means the force acting on the hatch is 1960000 or 1.96 * 10^6

I guess I could assume that the density of the water is 1.000 * 10^3. If that is the case then: the pressure of the water is (1.000 * 10^3)(9.8)(100) = 980000 So the force is 980000*2 = 1960000 I guess then I would subtract 202600 from 196000 giving me 1757400... I think

Wouldn't I need to know the density of the water to determine the pressure thai it is exerting on the hatch?

Homework Statement A submarine is operating at 100 m below the surface of the ocean. If the air inside the submarine is maintained at a pressure of 1 atmosphere, what is the magnitude of the force that acts on the rectangular hatch 2.0 x 1.0 m on the deck of the submarine? Homework...

If that is the case then I'm completely confused. I guess since mass = density*volume the mass of the air inside the balloon would be 1.3 * 5 = 6.5 which is more than the combine mass of the air and balloon. I'M STUMPED!

Unfortunately the problem does not state what type of gas is inside the balloon. But it does state that the total mass of the balloon and gas combined is 2.0 kg. I'm not sure if I should assume that the balloon is filled with air and not some other gas.

Homework Statement Can anyone help me with this problem? A balloon is released from a tall building. The total mass of the balloon including the enclosed gas is 2.0 kg. Its volume is 5.0 m^3. The density of air is 1.3 kg/m^3. What is the average density of the balloon? 2. The attempt...

This is the only information given in the problem. I thought the same thing. to me there seems to be missing information.

1. A 9.0-kg box of oranges slides from rest down a frictionless incline from a height of 5.0m. A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to the right of point A. What is the speed of the block just before it reaches point A? Can anyone...

Wouldn't the net force actually be zero. Each team is applying an average force of 2500N but in opposite directions thus the net force in the center of the rope would be 2500N-2500N = 0.